Updated on 2024/05/18

写真a

 
KATAOKA Kyoko S.
 
Organization
Research Institute for Natural Hazards and Disaster Recovery Professor
Graduate School of Science and Technology Environmental Science and Technology Professor
Title
Professor
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Degree

  • 博士(理学) ( 2002.3   大阪市立大学 )

Research Interests

  • Natural Hazard Science

  • Field Science

  • Volcanology

  • Quaternary Geology

  • Sedimentology

Research Areas

  • Natural Science / Solid earth sciences

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Disaster prevention engineering

  • Natural Science / Human geosciences

  • Humanities & Social Sciences / Geography

Research History (researchmap)

  • Niigata University   Research Institute for Natural Hazards and Disaster Recovery   Professor

    2020.10

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  • Niigata University   Research Institute for Natural Hazards and Disaster Recovery   Associate Professor

    2011.4 - 2020.9

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  • Niigata University   Research Center for Natural Hazards and Recovery   Associate Professor

    2006.4 - 2011.3

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  • Niigata University   Research Institute for Hazards in Snowy Areas   Associate Professor

    2004.9 - 2006.3

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  • Science Council of Japan   Associate Member

    2023.10

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  • GNS Science, Wairakei Research Centre, New Zealand   Visiting Research Fellow

    2007.6 - 2008.5

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  • Kyoto University   Faculty of Science   Research Fellow

    2004.4 - 2004.9

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  • Niigata University   Research Fellow

    2002.11 - 2004.3

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Research History

  • Niigata University   Research Institute for Natural Hazards and Disaster Recovery Research Division of Cascading and Linked Multi-Hazards   Professor

    2020.10

  • Niigata University   Research Institute for Natural Hazards and Disaster Recovery Research Division of Cascading and Linked Multi-Hazards   Associate Professor

    2015.4 - 2020.9

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology   Associate Professor

    2011.4

  • Niigata University   Research Institute for Natural Hazards and Disaster Recovery Division of Geo-Science Section of Geology and Geomorphology   Associate Professor

    2011.4 - 2015.3

  • Niigata University   Research Center for Natural Hazards and Disaster Recovery   Associate Professor

    2006.4 - 2011.3

  • Niigata University   Associate Professor (as old post name)

    2004.9 - 2006.3

  • Niigata University

    2002.11 - 2004.3

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Education

  • Osaka City University   Graduate School of Science

    1998.4 - 2002.3

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    Country: Japan

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  • Osaka City University   Graduate School of Science

    1996.4 - 1998.3

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  • Osaka City University   Faculty of Science   地学科

    1992.4 - 1996.3

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    Country: Japan

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Professional Memberships

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Committee Memberships

  • 日本学術会議   地球惑星科学委員会IUGS分科会  

    2024.2   

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    Committee type:Government

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  • 日本学術会議   地球惑星科学委員会地球惑星科学社会貢献分科会  

    2023.12   

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    Committee type:Government

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  • 日本学術会議   地球惑星科学委員会地球・人間圏分科会  

    2023.12   

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    Committee type:Government

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  • 日本学術会議   地球惑星科学委員会地球惑星科学国際連携分科会 INQUA 小委員会  

    2023.11   

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    Committee type:Government

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  • 日本堆積学会   運営委員  

    2023.1   

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    Committee type:Academic society

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  • 日本堆積学会   国際交流委員長  

    2023.1   

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    Committee type:Academic society

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  • 日本地質学会   代議員  

    2022.6   

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    Committee type:Academic society

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  • 日本学術会議   地球惑星科学委員会 IGU分科会・IAG小委員会  

    2022.2   

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    Committee type:Government

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  • 新潟焼山火山防災協議会   火山専門家  

    2018.12   

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    Committee type:Municipal

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  • 日本学術振興会   科学研究費委員会専門委員  

    2018.12 - 2021.11   

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    Committee type:Government

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  • 日本火山学会   編集委員  

    2018.7 - 2022.6   

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    Committee type:Academic society

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  • Journal "Volcanica"   Associate Editor  

    2017.12   

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    Committee type:Academic society

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  • 日本第四紀学会   編集委員  

    2011.8 - 2015.7   

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    Committee type:Academic society

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  • 日本堆積学会   日本堆積学会20周年記念行事実行委員  

    2021.10 - 2023.9   

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    Committee type:Academic society

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  • 日本第四紀学会   評議員  

    2019.8 - 2021.7   

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  • 日本堆積学会   行事委員  

    2017.1 - 2019.12   

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  • 日本堆積学会   行事委員長  

    2014.1 - 2016.12   

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  • 日本堆積学会   運営委員  

    2014.1 - 2016.12   

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  • 日本堆積学会   基金運用委員  

    2011.1 - 2022.12   

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  • 日本地質学会   行事委員  

    2010.10 - 2013.9   

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  • 新潟県環境審議会   温泉部会委員  

    2009.6 - 2019.5   

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    Committee type:Municipal

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  • 日本堆積学会   行事委員  

    2005.1 - 2010.12   

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Papers

  • From ‘source to sink’ to ‘sink to source’: a review of volcanic fluvial and lacustrine successions in Japan Invited Reviewed

    Kyoko S. Kataoka

    Geological Society, London, Special Publications   520   393 - 416   2023.4

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Geological Society of London  

    Abstract

    Volcaniclastic sedimentological studies in Japan have addressed Miocene to Holocene volcaniclastic fluvial and lacustrine successions. These research approaches can be categorized into: 1) the “from volcanic source to sink” concept focusing on hydrological volcaniclastic sedimentation (including lahars), environmental impacts, and cascading processes by explosive volcanism; and 2) the “from sink to volcanic source” view, with a focus on elucidating volcanic and eruptive information such as the location of the eruption center, eruption style, and eruption age from analyses of distally deposited volcaniclastic sediments other than tephra fall deposits, despite the occasional absence of correlative eruption records in proximal areas and/or on the volcanic edifice itself. The geological records having a longer time span can reveal decadal- to millennial-scale hydrological and cascading volcaniclastic sedimentation, which cannot be assessed by direct observation in the present time. Also the distal volcaniclastic successions in sink having a continuous depositional record that can provide precise ages and the recurrence intervals of the past eruptions and eruption-associated hydrological events. Both perspectives, beyond the borders of sedimentology and volcanology, are necessary to fully capture the geologic record and to understand past volcanisms and their impacts, which eventually lead to prediction and preparing for future volcanic events.

    DOI: 10.1144/sp520-2022-171

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  • Crisis hazard assessment for snow-related lahars from an unforeseen new vent eruption: the 2018 eruption of Kusatsu-Shirane volcano, Japan Reviewed

    Kyoko S. Kataoka, Kae Tsunematsu, Takane Matsumoto, Atsushi Urabe, Katsuhisa Kawashima

    Earth, Planets and Space   73 ( 1 )   2021.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    <title>Abstract</title>Two-thirds of the 111 active volcanoes in Japan are covered with snow for several months during winter and demonstrate high hazard and risk potentials associated with snow-related lahars during and after eruptions. On 23 January 2018, a sudden phreatic eruption occurred at the ski field on Kusatsu-Shirane (Mt. Motoshirane) volcano, Japan. This new vent eruption from the snow-clad pyroclastic cone required forecasting of future snow-related lahars and crisis hazards zonation of downslope areas including Kusatsu town, a popular tourist site for skiing and hot springs. In order to achieve a prompt hazard assessment for snow-related lahars, a multidisciplinary approach was carried out involving characterization of proximal tephra deposits, snow surveys, and numerical lahar flow simulations using the Titan2D model. To determine the input parameters for the flow model, the consideration of snow water equivalent (SWE) immediately after the eruption (on 29 January) and in the post-eruptive period (on 12 March), was significant. In the case of Kusatsu-Shirane volcano during the winter of 2018, linear relationships between altitude and SWE, obtained at different elevations, were used to estimate the snow volume around the new vents. Several scenarios incorporating snow and snowmelt (water), with or without the occurrence of a new eruption, were simulated for the prediction of future lahars. Three lahar scenarios were simulated, including A) rain-on-snow triggered, B) ice/snow slurry, and C) full snowmelt triggered by a new eruption, and indicated the flow paths (inundation areas) and travel distances. These were useful for lahar hazard zonation and identification of potential high-risk areas. Since the input parameters required for the Titan2D flow model can be relatively easily determined, the model was suitable for the 2018 eruption at Motoshirane where historical and geological lahar records are not available for calibration. The procedure used in the study will enable rapid lahar prediction and hazard zonation at snow-clad volcanoes. Further consideration for simulating a cohesive-type flow, which was predicted by the primary deposits containing large amounts of clay minerals and could not be expressed in the Titan2D flow model, is necessary.

    DOI: 10.1186/s40623-021-01522-0

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    Other Link: https://link.springer.com/article/10.1186/s40623-021-01522-0/fulltext.html

  • From sink to volcanic source: Unravelling missing terrestrial eruption records by characterization and high-resolution chronology of lacustrine volcanic density flow deposits, Lake Inawashiro-ko, Fukushima, Japan Reviewed

    Kataoka, K.S, Nagahashi, Y

    Sedimentology   66 ( 7 )   2784 - 2827   2019.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/sed.12629

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  • Suspended sediment transport diversity in river catchments following the 2014 phreatic eruption at Ontake Volcano, Japan Reviewed

    Kataoka, K.S, Matsumoto, T, Saito, T, Nagahashi, Y, Iyobe, T

    Earth, Planets and Space   71 ( 1 )   15 (11 pages)   2019.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1186/s40623-019-0994-x

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  • Lahar characteristics as a function of triggering mechanism at a seasonally snow-clad volcano: contrasting lahars following the 2014 phreatic eruption of Ontake Volcano, Japan Reviewed

    Kyoko S. Kataoka, Takane Matsumoto, Takeshi Saito, Katsuhisa Kawashima, Yoshitaka Nagahashi, Tsutomu Iyobe, Akihiko Sasaki, Akihiko Sasaki, Keisuke Suzuki

    Earth, Planets and Space   70 ( 1 )   113 (28 pages)   2018.7

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    DOI: 10.1186/s40623-018-0873-x

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  • Millennial-scale reworking of tephra in alluvial to shallow marine settings: Distinguishing pseudo-isochrons from genuine ones Reviewed

    Kyoko S. Kataoka, Atsushi Urabe, Yoshitaka Nagahashi

    QUATERNARY INTERNATIONAL   397   173 - 193   2016.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Primary tephra layers can provide isochrons in a stratigraphic sequence. Such isochrons are powerful tools in terms of correlation and chronology of strata, and they constrain a chronological framework for geology, geomorphology, archaeology and palaeo-environmental studies in the Neogene to Quaternary. However, reworking processes can re-distribute tephra materials in both time and space, so that a given tephra can form a new discrete layer later in the depositional sequence, or it can be distributed in low concentrations (no visible layers, i.e., crypto-tephras) over a range of different stratigraphic horizons. The present study, based on sedimentological, petrographical, and geochemical analyses of reworked tephras in Japan, evaluates the duration and persistence of reworking and the tephra mobilisation and delivery to watersheds. Furthermore, it discusses how a unique isochron can be constructed from tephra distribution in a sedimentary sequence. Examples presented here are from fluvial and deltaic sequences in the Japanese Quaternary, which contain several visible tephra layers and a certain amount of tephra materials from multiple sources at different stratigraphical horizons. In the Niigata Plain, 5.4 ka Numazawako tephra material continued to be reworked for more than 4000 years after the eruption of Numazawa volcano, and was re-deposited as reworked pumice grains consisting of a "visible" tephra layer in delta front deposits. Mixed tephra materials originating from an earlier eruption of Numazawa volcano and eruptions from other calderas were also identified. In the Tsugaru Plain, post-2.5 ka subsurface deposits have &gt; 10% glass shards content throughout the sequence. Glass shards were derived from several different tephra materials, such as those from the most recent eruption of Towada volcano (AD 915), and earlier caldera forming eruptions (30 ka, 15 ka). Some of the glass shards probably originated from erosion of exposed Pliocene pyroclastic bedrock. Thus, tephra reworking processes in alluvial to shallow marine settings can continue long after an eruption has ended, and can persist even during inter-eruptive (i.e., background sedimentation) periods. As tephra reworking involves complicated processes, careful observation and interpretations are necessary to evaluate whether tephra materials can truly provide an isochron for the strata in which they are found to exist. (C) 2015 Elsevier Ltd and INQUA. All rights reserved.

    DOI: 10.1016/j.quaint.2015.03.022

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  • Geomorphic and sedimentary evidence of a gigantic outburst flood from Towada caldera after the 15 ka Towada-Hachinohe ignimbrite eruption, northeast Japan Reviewed

    Kyoko S. Kataoka

    GEOMORPHOLOGY   125 ( 1 )   11 - 26   2011.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    This study reports on geomorphic and sedimentary evidence for a gigantic breakout flood from Towada caldera, Honshu Island, northeast Japan, as observed along the Oirase River downstream from the outlet of the caldera lake. A number of features of the Oirase River are inconsistent with its present discharge, including the occurrence of 1) hanging valleys and a horseshoe-shaped waterfall in the upstream gorge area, 2) boulder bars and scattered flood boulders, 3) a dry valley at a high elevation in the gorge, and 4) a large fan (the Sanbongi fan) in the downstream area of the river. The Sanbongi fan is composed of thick, lithic-rich hyperconcentrated flow deposits that include pumice clasts derived from the 15 ka Towada-Hachinohe ignimbrite and well-rounded meter-sized (and outsized) boulders derived from bedrock of welded ignimbrite. The deposits are entirely aggradational, with no major channels, indicating the absence of a major hiatus during sedimentation. The depositional facies also indicate that a single sheet-like flood event deposited the sediment within the Sanbongi fan area. Based on the age of the Sanbongi fan, the flood occurred between 15 and 12 ka, after eruption of the Towada-Hachinohe ignimbrite. The most probable water source for the flood is Towada caldera lake, as suggested by landforms and sediments along the lake outlet. A paleohydrological analysis indicates that at least 6 km(3) of water was released from the caldera at a peak discharge of &gt;2 x 10(4) to 3 x 10(5) m(3) s(-1) during the breakout flood. Although the Sanbongi fan was previously considered to be a "normal" alluvial fan that formed during a stage of low-stand sea level, the present results show that the formation of the fan was closely related to a catastrophic flood from Towada caldera rather than perennial fluvial activity, climate change, or a change in relative sea level. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.geomorph.2010.08.006

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  • Impacts of explosive volcanism on distal alluvial sedimentation: Examples from the Pliocene-Holocene volcaniclastic successions of Japan Reviewed

    Kyoko S. Kataoka, Vern Manville, Takeshi Nakajo, Atsushi Urabe

    SEDIMENTARY GEOLOGY   220 ( 3-4 )   306 - 317   2009.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    Volcanic activities can create cataclysmic hazards to surrounding environments and human life not only during the eruption but also by hydrologic remobilisation (lahar) processes after the cessation of eruptive activity. Although there are many studies dealing with the assessment and mitigation of volcanic hazards, these are mostly concentrated on primary eruptive processes in areas proximal to active volcanoes. However, the influence of volcaniclastic resedimentation may surpass the impacts of primary eruptive activity in terms of both extent and persistence, and can ultimately result in severe hazards in downstream areas.
    Examination of the volcaniclastic successions of non-marine Pliocene-Holocene sedimentary basins in Japan has revealed hydrological volcaniclastic sedimentation in fluvial and lacustrine environments hundreds of kilometres from the inferred source volcano. Impacts on these distal and often spatially separated basins included drastic changes in depositional systems caused by sudden massive in fluxes of remobilised pyroclastic material. Typical volcaniclastic beds comprise centimetre-to decimetre-thick primary pyroclastic fall deposits overlain by metre- to 10s of metres-thick resedimented volcaniclastic deposits, intercalated in sedimentary successions of non-volcanic provenance. The relatively low component of primary pyroclastic fall deposits in the volcaniclastic beds suggests that: 1) potential volcanic hazards would be underestimated on the basis of primary pyroclastic fall events alone; and 2) the majority of resedimented material was likely derived from erosion of non-welded pyroclastic flow deposits in catchment areas rather than remobilisation of local fallout deposits from surrounding hillslopes.
    The nature, distribution and sequence of facies developed by distal volcaniclastic sediments reflect the influence of: 1) proximity to ignimbrite, but not directly with the distance to the eruptive centre; 2) ignimbrite nature (non-welded or welded) and volume; 3) temporal changes in sediment flux from the source area; 4) the physiography and drainage patterns of the source area and the receiving basin, and any intervening areas; and 5) the formation of ephemeral dam-lakes and intra-caldera lakes whose potential catastrophic failure can impact distal areas. Models of the styles and timing of distal volcaniclastic resedimentation are thus more complicated than those developed for proximal settings of stratovolcanoes and their volcaniclastic aprons and hence present different challenges for hazard assessment and mitigation. (C) 2009 Elsevier B. V. All rights reserved.

    DOI: 10.1016/j.sedgeo.2009.04.016

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  • Breakout flood from an ignimbrite-dammed valley after the 5 ka Numazawako eruption, northeast Japan Reviewed

    Kyoko S. Kataoka, Atsushi Urabe, Vern Manville, Atsushi Kajiyama

    GEOLOGICAL SOCIETY OF AMERICA BULLETIN   120 ( 9-10 )   1233 - 1247   2008.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:GEOLOGICAL SOC AMER, INC  

    Numazawa volcano in northeast Japan erupted most recently at ca. 5 ka, forming a 2-km-diameter caldera and emplacing at least 4 km(3) of valley-confined ignimbrite. The ignimbrite dammed the Tadami River to a depth of &gt;100 inn, temporarily impounding &gt;1.6 km(3) of water. Overtopping of the barrier triggered breaching and catastrophic release of the dam lake. Pyroclastic material redeposited by the ensuing flood is widely distributed along the Tadami and Agano Rivers in deposits tens of meters thick as far as the coastal Niigata Plain &gt;150 km downstream of the volcano. Evidence for damming and flooding found along the rivers includes (1) fine-grained, thinly laminated lacustrine deposits upstream of the pyroclastic blockage; (2) 30-m-thick, pumiceous debris-How and hyperconcentrated-flow deposits that show continuous sedimentation with no major hiatus downstream of the volcano; (3) fine-grained slackwater deposits at tributary river mouths; and (4) large flood boulders that form lags on stripped ignimbrite surfaces and younger terrace surfaces, or cropping out within hyperconcentrated-flow deposits. Paleohydraulic estimation techniques indicate a peak discharge of 30,000-50,000 m(3)/s at the breach point. Burial of Neolithic Jomon settlements by flood and volcaniclastic aggradational deposits at distal locations indicates that such indirect volcanogenic hazards are significant, even where direct primary consequences of volcanic eruptions are minor or absent.

    DOI: 10.1130/B26159.1

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  • Distal fluvio-lacustrine volcaniclastic resedimentation in response to an explosive silicic eruption: The Pliocene Mushono tephra bed, central Japan Reviewed

    K Kataoka

    GEOLOGICAL SOCIETY OF AMERICA BULLETIN   117 ( 1-2 )   3 - 17   2005.1

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    The Pliocene Mushono tephra bed, central Japan, is characterized by fluvio-lacustrine volcaniclastic resedimentation at distal locations from the volcanic source. Sedimentary responses to an explosive eruption are well recorded in the resedimented Mushono tephra bed. Immediately after the eruption, large volumes of primary volcaniclastic material were reworked from proximal areas and discharged into the distal basin. Overloading of fluvial systems by pyroclastic debris resulted in the development of low-sinuosity active fluvial channel systems that carried sediment-laden, hyperconcentrated flows. The fluvial system flowed into a lake more than 150 km from the inferred source location, resulting in delta formation and progradation. Primary pyroclastic fall deposits are only a few centimeters thick but are overlain by reworked volcaniclastic deposits more than 5 m thick, which show coarsening-upward successions representing fluvio-lacustrine deltaic progradation. The reworked succession consists of six sedimentary facies, which can be interpreted as prodelta, mouth bar, distributary-channel, hyperconcentrated-flow, interdistributary-lowland or floodplain, and slump deposits. Rounded, cobble-sized pumice clasts in prodelta and distributary-channel deposits and thick, reworked deposits imply that the majority of resedimented volcaniclastic material was derived from voluminous proximal ignimbrite, rather than thin, fine-grained distal fallout ash material. Vertical facies changes are concordant with a decrease in sediment yields with time. Lateral facies distributions correspond to episodic influxes of volcaniclastic sediments that controlled the morphology of discrete fluvio-lacustrine deltas. The distal sedimentary response to an explosive silicic eruption is thus clearly recorded in vertical and lateral facies distribution of reworked volcaniclastic sediments.

    DOI: 10.1130/B25379.1

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  • Volcaniclastic resedimentation in distal fluvial basins induced by large-volume explosive volcanism: the Ebisutoge-Fukuda tephra, Plio-Pleistocene boundary, central Japan Reviewed

    K Kataoka, T Nakajo

    SEDIMENTOLOGY   49 ( 2 )   319 - 334   2002.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:BLACKWELL PUBLISHING LTD  

    The Ebisutoge-Fukuda tephra (Plio-Pleistocene boundary, central Japan) has a well-recorded eruptive style, history, magnitude and resedimentation styles, despite the absence of a correlative volcanic edifice. This tephra was ejected by an extremely large-magnitude and complex volcanic eruption producing more than 400 km(3) total volume of volcanic materials (volcanic explosivity index=7), which extended more than 300 km away from the probable eruption centre. Remobilization of these ejecta occurred progressively after the completion of a series of eruptions, resulting in thick resedimented volcaniclastic deposits in spatially separated fluvial basins, more than 100 km from the source. Facies analysis of resedimented volcaniclastic deposits was carried out in distal fluvial basins. The distal tephra (approximate to100-300 km from the source) comprises two different lithofacies, primary pyroclastic-fall deposits and reworked volcaniclastic deposits. The resedimented volcaniclastic succession shows five distinct sedimentary facies, interpreted as debris-flow deposits (facies A), hyperconcentrated flow deposits (facies B), channel-fill deposits (facies C), floodplain deposits with abundant flood-flow deposits (facies D) and floodplain deposits with rare flood deposits (facies E). Resedimented volcaniclastic materials at distal locations originated from unconsolidated deposits of a climactic, large ignimbrite-forming eruption. Factors controlling inter- and intrabasinal facies changes are (1) temporal change of introduced volcaniclastic materials into the basin; (2) proximal-distal relationship; and (3) distribution pattern of pyroclastic-flow deposits relative to drainage basins. Thus, studies of the Ebisutoge-Fukuda tephra have led to a depositional model of volcaniclastic resedimentation in distal areas after extremely large-magnitude eruptions, an aspect of volcaniclastic deposits that has often been ignored or poorly understood.

    DOI: 10.1046/j.1365-3091.2002.00445.x

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  • An extremely large magnitude eruption close to the Plio-Pleistocene boundary: reconstruction of eruptive style and history of the Ebisutoge-Fukuda tephra, central Japan Reviewed

    K Kataoka, Y Nagahashi, S Yoshikawa

    JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH   107 ( 1-3 )   47 - 69   2001.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    An extremely large magnitude eruption of the Ebisutoge-Fukuda tephra, close to the Plio-Pleistocene boundary, central Japan. spread volcanic materials widely more than 290,000 km(2) reaching more than 300 km from the probable source. Characteristics of the distal air-fall ash (&gt; 150 km away from the vent) and proximal pyroclastic deposits are clarified to constrain the eruptive style, history, and magnitude of the Ebisutoge-Fukuda eruption.
    Eruptive history had five phases. Phase 1 is phreatoplinian eruption producing &gt; 105 km(3) of volcanic materials. Phases 2 and 3 are plinian eruption and transition to pyroclastic how. Plinian activity also occurred in phase 3, which ejected conspicuous obsidian fragments to the distal locations. In phase 5, collapse of eruption column triggered by phase 4. generated large pyroclastic how in all directions and resulted in more than 250-350 km(3) of deposits. Thus, the total volume of this tephra amounts over 380-390 km(3). This indicates that the Volcanic Explosivity Index (VEI) of the Ebisutoge-Fukuda tephra is greater than 7. The huge thickness of reworked volcaniclastic deposits overlying the fall units also attests to the tremendous volume of eruptive materials of this tephra.
    Numerous ancient tephra layers with large volume have been reported worldwide, but sources and eruptive history are often unknown and difficult to determine. Comparison of distal air-fall ashes with proximal pyroclastic deposits revealed eruption style, history and magnitude of the Ebisutoge-Fukuda tephra. Hence, recognition of the Ebisutoge-Fukuda tephra, is useful for understanding the volcanic activity during the Pliocene to Pleistocene, is important as a boundary marker bed, and can be used to interpret the global environmental and climatic impact of large magnitude eruptions in the past. (C) 2001 Elsevier Science B.V, All rights reserved.

    DOI: 10.1016/S0377-0273(00)00300-0

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  • The 2022 Heavy Rainfall Disaster Caused by Stagnated Linear Rainbands in the Kaetsu Region, Niigata Reviewed

    Ryoko Nishii, Katsuhisa Kawashima, Takane Matsumoto, Kyoko S. Kataoka, Shun Watabe, Hiroshi Kurita

    Journal of Japan Society for Natural Disaster Science   2024

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  • Lahar deposits along the Nigorikawa River in the eastern foot of Zao Volcano, Japan, during the last 8000 years Reviewed

    Masao Ban, Konosuke Kawashima, Kae Tsunematsu, Kyoko S. Kataoka, Takumi Imura

    Journal of Volcanology and Geothermal Research   432   107685 - 107685   2022.12

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    DOI: 10.1016/j.jvolgeores.2022.107685

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  • Geologic and petrologic characteristics of the lahar deposits at western foot of Zao Volcano Reviewed

    Ban, M, Kawashima, K, Tsunematsu, K, Imura, T, Kataoka, K.S, Yamanoi, T

    Journal of Disaster Research   17 ( 5 )   736 - 744   2022.8

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    The lahars are one of the most hazardous volcanic phenomena causing the third greatest causalities among the volcanic hazards since the 16th century worldwide. Lahars can flow down a long distance and cause tremendous disaster at the foot of volcanoes often beyond the areas of primary volcanic impacts of pyroclastic fall and pyroclastic density currents. Therefore, the research on lahar history of active volcanoes approaching from an analysis of a geological record in distal volcanic regions is significant for lahar hazard risk evaluation. Zao volcano has high risks of future eruptions, because volcanic tremors have been detected since 2013. The presence of a crater lake at the summit area, and steep slopes at the high altitude of Zao indicates high potential energy for future lahars, if triggered by an eruption starting underneath the crater lake. This study firstly reports the existence of lahar deposits at the western foot of Zao and discusses the depositional features and the origin of these as well as the lahar hazard risk at this volcano. The lahar deposits were exposed during the archaeological excavation of the Fujiki ruin, western foot of the Zao volcano. Two major lahar units, L1 and L2, were recognized. Based on the <sup>14</sup>C dating and stratigraphic relationships, the ages of units L1 and L2 were estimated to be &lt;ca. 4.0 and ca. 4.6 cal ka, respectively. The lithology, granulometry, and componentry features of the lahar deposits revealed the depositional features and the source materials. The upper part of L1 (L1-1) unit and lower part of L2 (L2-2) unit were deposited from a hyperconcentrated flow, whereas, the lower part of L1 (L1-2) unit and upper part of L2 (L2-1) unit were formed by a debris flow. The sources of both units were phreatomagmatic eruption products that may have erupted shortly before the lahar events. This implies that these eruptions were the most plausible trigger for the lahars. These results suggest that lahar risk will increase especially after the phreatomagmatic eruptions as well as phreatic eruptions, even in the western foot of this volcano.

    DOI: 10.20965/jdr.2022.p0736

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  • Prediction for the next 50 years of radiocesium concentration after the Fukushima Dai-ichi Nuclear Power Plant accident based on the lacustrine sediment analysis, Lake Inawashiro-ko, Fukushima Prefecture, Japan Reviewed

    Yoshitaka NAGAHASHI, Kyoko S. KATAOKA, Kenji NANBA

    Journal of Geography (Chigaku Zasshi)   131 ( 3 )   339 - 363   2022.6

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    DOI: 10.5026/jgeography.131.339

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  • A Study of War Remains Using Interviews, Excavations, and Ground Penetrating Radar Surveys : In the Muramatsu Station, Field Center for Sustainable Agriculture, Niigata University Reviewed

    19   1 - 29   2022.3

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  • New insights into the recent eruptive and collapse history of Montagne Pelée (Lesser Antilles Arc) from offshore marine drilling site U1401A (IODP Expedition 340) Reviewed

    Clara Solaro, Georges Boudon, Anne Le Friant, Hélène Balcone-Boissard, Laurent Emmanuel, Martine Paterne, IODP Expedition Science Party

    Journal of Volcanology and Geothermal Research   403   107001 - 107001   2020.10

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    DOI: 10.1016/j.jvolgeores.2020.107001

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  • Late Cenozoic Igneous Activity and Crustal Structure in the NE Japan Arc: Background of Inland Earthquake Activity Reviewed

    Takeyoshi YOSHIDA, Reishi TAKASHIMA, Takeshi KUDO, Oky Dicky Ardiansyah PRIMA, Sumire MAEDA, Keisuke YOSHIDA, Tomomi OKADA, Satoshi MIURA, Tomohiro TAKAHASHI, Yoshitaka NAGAHASHI, Kyoko KATAOKA

    Journal of Geography (Chigaku Zasshi)   129 ( 4 )   529 - 563   2020.8

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    GNSS data analyses reveal that recent large inland earthquakes in the Northeast (NE) Japan occurred in strain concentration zones. Seismic low-velocity anomalies, indicative of mechanically weak materials (weak zones), are estimated below the strain concentration zones at depths corresponding to the lower crust. Such crustal structures with weak zones have been formed as an accumulation of tectonic movements and igneous activities since early Miocene. Volcanic activity in the NE Japan during the Late Cenozoic Era can be subdivided into three prominent stages: continental margin volcanism stage, back-arc basin opening stage, and island-arc volcanism stage. The crustal structure of the NE Japan arc is characterized by many rift structures and large transcurrent faults formed during the back-arc basin opening stage, and by many large caldera volcanoes formed during the island-arc volcanism stage. The relationships among mechanically weak crustal structures, present strain localizations, earthquake distributions, and geological characteristics including rift structures, large transcurrent faults, volcanic belts, and caldera volcanoes, are clarified using various geophysical data such as gravity anomalies, seismic velocity structures, strain rates, and epicenter distributions. The results show that strain concentration zones and inland earthquake epicenters have close spatial relationships with geological structures such as rift boundary faults, large transcurrent faults, caldera structures, and volcanic belts. It can be interpreted that fluids migrating upwards from lower crustal weak zones below rifts, volcanic belts, or calderas, effectively weakened the crust due to its high pore fluid pressure, and caused earthquake ruptures under horizontal compression.

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  • Geochemistry of Marine Carbonates from Hole 1394, off the Coast of Montserrat, IODP Expedition-340: Implications on Provenance, Paleoenvironment and Lesser Antilles Arc Migration Reviewed

    Subramanyam, K.S.V, Balaram, V, Manikyamba, C, Roy, P, Krishna, A.K, Sawant, S.S, Narshimha, C, the IODP Expedition Scientists

    In: Pandey D., Ravichandran M., Nair N. (eds) Dynamics of the Earth System: Evolution, Processes and Interactions. Society of Earth Scientists Series, Springer   101 - 140   2020

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  • Submarine landslides around volcanic islands -A review of what can be learned from the Lesser Antilles Arc-. Reviewed

    Le Friant, A, Lebas, E, Brunet, M, Lafuerza, S, Hornbach, M, Coussens, M, Watt, S, Cassidy, M, Talling, P.J, IODP Expedition Science Party

    In: Ogata, K., Festa, A., Pini, G.A. (eds.) Submarine Landslides: Subaqueous Mass Transport Deposits from Outcrops to Seismic Profiles. Geophysical Monograph Series, American Geophysical Union   277297   2020

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  • Lahar record during the last 2500 years, Chokai Volcano, northeast Japan: Flow behavior, sourced volcanic activity, and hazard implications Reviewed

    Minami, Y, Ohba, T, Hayashi, S, Kokubu, Y, Kataoka, K.S

    Journal of Volcanology and Geothermal Research   387   106661   2019.12

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    Volcanic fans and volcaniclastic aprons (ring plains) developed at the foot of a volcano preserve the products of high-discharge, sediment-laden lahar flows that originate from a volcano. Geological and geomorphological features of a volcanic fan are important for discussing the flow characteristics and history of far-reaching flows such as lahars. The present study focuses on volcanic-fan deposits at the northern base of Chokai Volcano in northeast Japan. The authors conducted geomorphological analysis, excavation survey at the distal part of the volcanic fan, sedimentary facies analysis, radiocarbon dating, and historical document analysis to understand the flow characteristics and history of far-reaching lahars in relation to changes in the depositional processes and their triggering volcanic activity. Geological observation by manual trenching and coring revealed that the volcanic fan is composed mainly of a series of lahar deposits formed by at least five large lahar events. The 14C ages of the lahar deposits and their correlation with historical documents indicate that the large lahars travelled down the volcanic fan at: the 2nd–5th century BCE (L1); 2nd to 4th century BCE (L2); 5th to 7th century CE (L3); 871 CE (L4); and 1801 CE (L5) after the Kisakata debris avalanche (2.5 ka). According to the stratigraphy, ratio of magmatic fragments and hydrothermally altered material content in the deposits, and correlation with historical documents, these lahar events can be classified into three types in terms of their material source: (1) a cohesive debris flow sourced by the debris avalanche deposit (L1); (2) a non-cohesive lahar by a magmatic eruption (L2, L3, L4, and L5–1 subunit); and (3) a cohesive debris flow by a phreatic eruption (L5–2 subunit). The facies analysis revealed that the different flow behaviors of lahars reflect their sourced volcanic activity. The oldest lahar (L1), incorporating debris avalanche deposit, flowed as hazardous cohesive debris flow; lahars after magmatic eruptions (L2, L3, L4, and L5–1 subunit) tends to be streamflow through the flow transformation of sandy debris flow; and a cohesive lahar (L5–2 subunit) by a phreatic eruption tends to be of small scale. These results indicate that the characteristics of a lahar depend largely on causal volcanic activity.

    DOI: 10.1016/j.jvolgeores.2019.106661

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  • Soft-sediment deformation structures in gravelly fluvial deposits: a record of Cretaceous seismic activity in Patagonia? Reviewed

    Villegas, P, Umazano, A.M, Melchor, R.N, Kataoka, K

    Journal of South American Earth Sciences   90   325 - 337   2019.3

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    DOI: 10.1016/j.jsames.2018.12.016

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  • Descriptions and 14C ages of the Holocene tephra layers on the eastern flank of Adatara volcano, northeast Japan Reviewed

    Nagahashi, Y, Kataoka, K

    Earth Science (Chikyu Kagaku)   73   47 - 48   2019.1

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  • Descriptions and 14C ages of the Holocene tephra layers on the northwestern flank of Bandai volcano, northeast Japan Reviewed

    Nagahashi, Y, Kataoka, K

    Earth Science (Chikyu Kagaku)   73   49 - 50   2019.1

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  • 融雪型火山泥流の流動性に与える雪の影響 Reviewed

    沖田竜馬, 河島克久, 松元高峰, 片岡香子, 渡部俊

    寒地技術論文・報告集   34   2018.12

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  • Spfa-1 tephra identified from core samples in Lake Inawashiro-ko and off Sendai in the Pacific Ocean, northeast Japan Reviewed

    Nagahashi Yoshitaka, Kimura Jun-Ichi, Sumita Mari, Ikehara Ken, S. Kataoka Kyoko, Nakazawa Naomi

    The Quat. Res. (Daiyonki-Kenkyu)   57 ( 2 )   65 - 75   2018

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    DOI: 10.4116/jaqua.57.65

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  • Photogrammetry-based texture analysis of a volcaniclastic outcrop-peel: Low-cost alternative to TLS and automation potentialities using Haar Wavelet and Spatial- Analysis Algorithms Reviewed

    Gomez, C, Kataoka, K.S, Saputra, A. Wassmer, P, Urabe, A, Morgenroth, J, Kato, A

    Forum Geografi (Indonesian Journal of Spatial and Regional Analysis)   31   16 - 27   2017.6

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    DOI: 10.23917/forgeo.v31i1.3977

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  • Concurrent and sustainable development of a local-scale digital heritage inventory through action research at Bat, Oman Reviewed

    Yasuhisa Kondo, Takehiro Miki, Taichi Kuronuma, Yuichi S. Hayakawa, Kyoko Kataoka, Takashi Oguchi

    Journal of Cultural Heritage Management and Sustainable Development   6 ( 2 )   195 - 212   2016.8

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    © 2016, © Emerald Group Publishing Limited. Purpose – The purpose of this paper is to present a concurrent implementation of sustainable inventory for the UNESCO World Heritage sites of Bat, Al-Khutm and Al-Ayn in the interior of Oman. Design/methodology/approach – A digital heritage inventory (DHI) was developed through an action research to realize demands of the local agent and to co-design the solution. The Ministry of Heritage and Culture of Oman, the local agent, demanded to have archaeological information of the sites shared with foreign expeditions, which had worked at the sites for decades, for efficient heritage management, scientific research, outreach, and education. To this end, the Bat Digital Heritage Inventory (BatDHI) was implemented by a combination of network-access-ready database application, open source geographical information systems, and a web-based map service to incorporate and visualize previous works, which were concurrently cross-checked and updated by ground-truth surveys. Findings – The online inventory made it possible to update information during archaeological fieldwork in real time and accelerated the decision-making process in heritage management by prompt data updates and visualization. Research limitations/implications – The DHI is extendable for other sites or regions. It should also be considered to install Arches, an open-source suite of digital heritage inventories. Practical implications – The BatDHI was implemented through the action research mentioned in the design/methodology/approach section and yielded the implications mentioned in the findings section. Originality/value – This paper is a challenging application of transdisciplinary approach to the sustainable heritage management, in which researchers and societal stakeholders collaborate for co-design of research agendas, co-production of knowledge, and co-dissemination of outcomes.

    DOI: 10.1108/JCHMSD-01-2016-0005

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  • The relationship between eruptive activity, flank collapse, and sea level at volcanic islands: A long-term (> 1 Ma) record offshore Montserrat, Lesser Antilles Reviewed

    Maya Coussens, Deborah Wall-Palmer, Peter. J. Talling, Sebastian. F. L. Watt, Michael Cassidy, Martin Jutzeler, Michael A. Clare, James. E. Hunt, Michael Manga, Thomas. M. Gernon, Martin. R. Palmer, Stuart. J. Hatter, Georges Boudon, Daisuke Endo, Akihiko Fujinawa, Robert Hatfield, Matthew. J. Hornbach, Osamu Ishizuka, Kyoko Kataoka, Anne Le Friant, Fukashi Maeno, Molly McCanta, Adam. J. Stinton

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS   17 ( 7 )   2591 - 2611   2016.7

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    Hole U1395B, drilled southeast of Montserrat during Integrated Ocean Drilling Program Expedition 340, provides a long (&gt;1 Ma) and detailed record of eruptive and mass-wasting events (&gt;130 discrete events). This record can be used to explore the temporal evolution in volcanic activity and landslides at an arc volcano. Analysis of tephra fall and volcaniclastic turbidite deposits in the drill cores reveals three heightened periods of volcanic activity on the island of Montserrat (approximate to 930 to approximate to 900 ka, approximate to 810 to approximate to 760 ka, and approximate to 190 to approximate to 120 ka) that coincide with periods of increased volcano instability and mass-wasting. The youngest of these periods marks the peak in activity at the Soufriere Hills volcano. The largest flank collapse of this volcano (approximate to 130 ka) occurred toward the end of this period, and two younger landslides also occurred during a period of relatively elevated volcanism. These three landslides represent the only large (&gt;0.3 km(3)) flank collapses of the Soufriere Hills edifice, and their timing also coincides with periods of rapid sea level rise (&gt;5 m/ka). Available age data from other island arc volcanoes suggest a general correlation between the timing of large landslides and periods of rapid sea level rise, but this is not observed for volcanoes in intraplate ocean settings. We thus infer that rapid sea level rise may modulate the timing of collapse at island arc volcanoes, but not in larger ocean-island settings.

    DOI: 10.1002/2015GC006053

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  • Permeability and pressure measurements in Lesser Antilles submarine slides: Evidence for pressure-driven slow-slip failure Reviewed

    Matthew J. Hornbach, Michael Manga, Michael Genecov, Robert Valdez, Peter Miller, Demian Saffer, Esther Adelstein, Sara Lafuerza, Tatsuya Adachi, Christoph Breitkreuz, Martin Jutzeler, Anne Le Friant, Osamu Ishizuka, Sally Morgan, Angela Slagle, Peter J. Tailing, Andrew Fraass, Sebastian F. L. Watt, Nicole A. Stroncik, Mohammed Aljandali, Georges Boudon, Akihiko Fujinawa, Robert Hatfield, Kyoko Kataoka, Fukashi Maeno, Michael Martinez-Colon, Molly McCanta, Martin Palmer, Adam Stinton, K. S. V. Subramanyam, Yoshihiko Tamura, Benoit Villemant, Deborah Wall-Palmer, Fei Wang

    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH   120 ( 12 )   7986 - 8011   2015.12

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    Recent studies hypothesize that some submarine slides fail via pressure-driven slow-slip deformation. To test this hypothesis, this study derives pore pressures in failed and adjacent unfailed deep marine sediments by integrating rock physics models, physical property measurements on recovered sediment core, and wireline logs. Two drill sites (U1394 and U1399) drilled through interpreted slide debris; a third (U1395) drilled into normal marine sediment. Near-hydrostatic fluid pressure exists in sediments at site U1395. In contrast, results at both sites U1394 and U1399 indicate elevated pore fluid pressures in some sediment. We suggest that high pore pressure at the base of a submarine slide deposit at site U1394 results from slide shearing. High pore pressure exists throughout much of site U1399, and Mohr circle analysis suggests that only slight changes in the stress regime will trigger motion. Consolidation tests and permeability measurements indicate moderately low (similar to 10(-16)-10(-17)m(2)) permeability and overconsolidation in fine-grained slide debris, implying that these sediments act as seals. Three mechanisms, in isolation or in combination, may produce the observed elevated pore fluid pressures at site U1399: (1) rapid sedimentation, (2) lateral fluid flow, and (3) shearing that causes sediments to contract, increasing pore pressure. Our preferred hypothesis is this third mechanism because it explains both elevated fluid pressure and sediment overconsolidation without requiring high sedimentation rates. Our combined analysis of subsurface pore pressures, drilling data, and regional seismic images indicates that slope failure offshore Martinique is perhaps an ongoing, creep-like process where small stress changes trigger motion.

    DOI: 10.1002/2015JB012061

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  • Rapid onset of mafic magmatism facilitated by volcanic edifice collapse Reviewed

    M. Cassidy, S. F. L. Watt, P. J. Talling, M. R. Palmer, M. Edmonds, M. Jutzeler, D. Wall-Palmer, M. Manga, M. Coussens, T. Gernon, R. N. Taylor, A. Michalik, E. Inglis, C. Breitkreuz, A. Le Friant, O. Ishizuka, G. Boudon, M. C. McCanta, T. Adachi, M. J. Hornbach, S. L. Colas, D. Endo, A. Fujinawa, K. S. Kataoka, F. Maeno, Y. Tamura, F. Wang

    GEOPHYSICAL RESEARCH LETTERS   42 ( 12 )   4778 - 4785   2015.6

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    Volcanic edifice collapses generate some of Earth's largest landslides. How such unloading affects the magma storage systems is important for both hazard assessment and for determining long-term controls on volcano growth and decay. Here we present a detailed stratigraphic and petrological analyses of volcanic landslide and eruption deposits offshore Montserrat, in a subduction zone setting, sampled during Integrated Ocean Drilling Program Expedition 340. A large (6-10km(3)) collapse of the Soufriere Hills Volcano at similar to 130ka was followed by explosive basaltic volcanism and the formation of a new basaltic volcanic center, the South Soufriere Hills, estimated to have initiated &lt;100years after collapse. This basaltic volcanism was a sharp departure from the andesitic volcanism that characterized Soufriere Hills' activity before the collapse. Mineral-melt thermobarometry demonstrates that the basaltic magma's transit through the crust was rapid and from midcrustal depths. We suggest that this rapid ascent was promoted by unloading following collapse.

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  • 津軽平野岩木川下流域における複数起源のテフラの再堆積と混合 Reviewed

    片岡香子, 長橋良隆, 小野映介

    第四紀研究   54 ( 1 )   21 - 29   2015.2

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  • テフラ学(第7回):肉眼視できないテフラ(クリプトテフラ)の認定と評価 Reviewed

    長橋良隆, 片岡香子

    第四紀研究   54 ( 1 )   31 - 38   2015.2

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  • Submarine record of volcanic island construction and collapse in the Lesser Antilles arc: First scientific drilling of submarine volcanic island landslides by IODP Expedition 340 Reviewed

    A. Le Friant, O. Ishizuka, G. Boudon, M. R. Palmer, P. J. Talling, B. Villemant, T. Adachi, M. Aljahdali, C. Breitkreuz, M. Brunet, B. Caron, M. Coussens, C. Deplus, D. Endo, N. Feuillet, A. J. Fraas, A. Fujinawa, M. B. Hart, R. G. Hatfield, M. Hornbach, M. Jutzeler, K. S. Kataoka, J. -C. Komorowski, E. Lebas, S. Lafuerza, F. Maeno, M. Manga, M. Martinez-Colon, M. McCanta, S. Morgan, T. Saito, A. Slagle, S. Sparks, A. Stinton, N. Stroncik, K. S. V. Subramanyam, Y. Tamura, J. Trofimovs, B. Voight, D. Wall-Palmer, F. Wang, S. F. L. Watt

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS   16 ( 2 )   420 - 442   2015.2

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    IODP Expedition 340 successfully drilled a series of sites offshore Montserrat, Martinique and Dominica in the Lesser Antilles from March to April 2012. These are among the few drill sites gathered around volcanic islands, and the first scientific drilling of large and likely tsunamigenic volcanic island-arc landslide deposits. These cores provide evidence and tests of previous hypotheses for the composition and origin of those deposits. Sites U1394, U1399, and U1400 that penetrated landslide deposits recovered exclusively seafloor sediment, comprising mainly turbidites and hemipelagic deposits, and lacked debris avalanche deposits. This supports the concepts that i/ volcanic debris avalanches tend to stop at the slope break, and ii/ widespread and voluminous failures of preexisting low-gradient seafloor sediment can be triggered by initial emplacement of material from the volcano. Offshore Martinique (U1399 and 1400), the landslide deposits comprised blocks of parallel strata that were tilted or microfaulted, sometimes separated by intervals of homogenized sediment (intense shearing), while Site U1394 offshore Montserrat penetrated a flat-lying block of intact strata. The most likely mechanism for generating these large-scale seafloor sediment failures appears to be propagation of a decollement from proximal areas loaded and incised by a volcanic debris avalanche. These results have implications for the magnitude of tsunami generation. Under some conditions, volcanic island landslide deposits composed of mainly seafloor sediment will tend to form smaller magnitude tsunamis than equivalent volumes of subaerial block-rich mass flows rapidly entering water. Expedition 340 also successfully drilled sites to access the undisturbed record of eruption fallout layers intercalated with marine sediment which provide an outstanding high-resolution data set to analyze eruption and landslides cycles, improve understanding of magmatic evolution as well as offshore sedimentation processes.

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  • Preserved sedimentary structures in the Archean Dharwar Supergroup, southwest India Reviewed

    Kataoka Kyoko S, Toyoshima Tsuyoshi, Mishima Kaoru, Hokada Tomokazu, Satish-Kumar M, Ueno Yuichiro, Kamei Atsushi

    Jour. Geol. Soc. Japan   121 ( 12 )   VII - VIII   2015

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  • Stratigraphy, Chronology and Depositional Processes of Lahar Deposits in the Sukawa River System, Adatara Volcano, Northeast Japan Reviewed

    KATAOKA Kyoko S, KAMINO Narumi, NAGAHASHI Yoshitaka, KIMURA Katsuhiko

    BVSJ   60 ( 4 )   461 - 475   2015

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    Previously known lahar deposits along the Sukawa River, western slope of Adatara volcano, consist of at least 7 muddy (cohesive) units and were formed during the last 2500 years. This paper reports stratigraphy, chronology and depositional processes of the newly found lahar units that were deposited older than 2500 years ago. ^<14>C dating for wood fragments within lahar deposits and intercalated paleosol layers indicates that at least 18 lahar events occurred in the area during the last 14000 years. The newly found lahar units comprise 10 muddy matrix-rich units and one bouldery gravel unit. The muddy matrix-rich units are very poorly sorted with pebble to cobble sized andesite clasts and hydrothermally altered clasts. Bouldery gravel unit is filled with sandy matrix and composed of clasts with oxidized rind locally. Bulk chemistry of these lahar units indicates that high sulfur content in the muddy units whereas Fe_2O_3 content is higher in the bouldery gravel units. The muddy units are derived from syn- or post-eruptive lahars in relations with phreatic eruptions or degradation of hydrothermally altered source rocks nearby the Numanotaira crater at the summit. The bouldery unit distributed farther downstream may have resulted from a non-cohesive debris flow or an outburst flood from the crater or a volcanically dammed upstream area. The presence of oxidized clasts indicates that during traveling, the watery flow entrained clasts which were exposed on a gravelly riverbed in an inter-eruptive period. The two types of lahar deposits show flows with different characteristics (cohesive and non-cohesive) that originated from Adatara volcano. Proximal eruptive units in the summit area sometimes can be degraded easily and overprinted by other eruptive units that result in a paucity and difficulty in understanding the precise eruption history of a volcano. Therefore, approaching from analysis of distally deposited lahar units will give a hint to assess not only a lahar trigger but also the types, frequency and volume of volcanic eruptions.

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  • Depositional Processes and Temporal Component-change of Lahar Deposits at the Northern Foot of Chokai Volcano, NE Japan Reviewed

    MINAMI Yusuke, OHBA Tsukasa, HAYASHI Shintaro, KATAOKA Kyoko S

    BVSJ   60 ( 1 )   1 - 16   2015

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    Chokai volcano is an andesitic stratovolcano in northeast Japan. The collapse of parts of the volcano occurred about 2500 years ago, and formed the Kisakata debris avalanche deposits. The post-2.5 ka fan (partly volcaniclastic apron) deposits are largely distributed in north to northwestern foot of the volcano. The fan deposits consist of several lithological/sedimentological units, however, most of their geological, sedimentological, and geomorphic characteristics have not been examined in previous studies. This paper, therefore, aims at understanding of geomorphology and depositional processes of these lahar deposits and mineralogical component changes in relations with different sources. Field survey in the upstream and observation of a trench in the downstream area revealed that the fan deposits consist of more than 16 units, which are composed of debris flow, hyperconcentrated flow and streamflow facies; most of them were deposited by lahar events. The lahar deposits have total thickness of 30 m, and overlie the Kisakata debris avalanche deposit. In proximal areas (with steep to moderate slopes), lahars flowed down as debris flows. Whereas in the distal area (with very gentle slopes), the lahars were transformed into hyperconcentrated flow and/or stream flows commonly, although some of them reached to the distal area with a debris flow nature. Clasts of the lahar deposits comprise altered and fresh andesites, mudstones and sandstones. Proportions of altered andesite clasts to total clasts decrease upwards in stratigraphic sequences. Matrices of the lower eight units are composed of grayish-blue clay and are different from those of the upper eight units, which are composed of brownish yellow volcanic sand. The stratigraphic variation in the matrix component is consistent with the change in matrix mineral assemblage, possibly reflecting changes in the source materials from Chokai volcano.

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  • Tephrology (part 6) : Methods of description for medial to distal tephra beds Reviewed

    S. Kataoka Kyoko, Nagahashi Yoshitaka

    The Quat. Res.   53 ( 6 )   323 - 329   2014.12

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    DOI: 10.4116/jaqua.53.323

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  • Tephrology (part 5) : Major element composition of volcanic glass shards and tephra beds correlation Reviewed

    Nagahashi Yoshitaka, S. Kataoka Kyoko

    The Quat. Res.   53 ( 5 )   265 - 270   2014.10

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    DOI: 10.4116/jaqua.53.265

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  • Tephrology (part 4) : Grain morphology and component of tephra and volcaniclastic particles Reviewed

    Nagahashi Yoshitaka, S. Kataoka Kyoko

    The Quat. Res.   53 ( 4 )   229 - 234   2014.8

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    DOI: 10.4116/jaqua.53.229

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  • Late Pleistocene stratigraphy of IODP Site U1396 and compiled chronology offshore of south and south west Montserrat, Lesser Antilles Reviewed

    Deborah Wall-Palmer, Maya Coussens, Peter J. Talling, Martin Jutzeler, Michael Cassidy, Isabelle Marchant, Martin R. Palmer, Sebastian F. L. Watt, Christopher W. Smart, Jodie K. Fisher, Malcolm B. Hart, Andrew Fraass, Jessica Trofimovs, Anne Le Friant, Osamu Ishizuka, Tatsuya Adachi, Mohammed Aljahdali, Georges Boudon, Christoph Breitkreuz, Daisuke Endo, Akihiko Fujinawa, Robert Hatfield, Matthew J. Hornbach, Kyoko Kataoka, Sara Lafuerza, Fukashi Maeno, Michael Manga, Michael Martinez-Colon, Molly McCanta, Sally Morgan, Takeshi Saito, Angela L. Slagle, Adam J. Stinton, K. S. V. Subramanyam, Yoshihiko Tamura, Benoit Villemant, Fei Wang

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS   15 ( 7 )   3000 - 3020   2014.7

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    Marine sediments around volcanic islands contain an archive of volcaniclastic deposits, which can be used to reconstruct the volcanic history of an area. Such records hold many advantages over often incomplete terrestrial data sets. This includes the potential for precise and continuous dating of intervening sediment packages, which allow a correlatable and temporally constrained stratigraphic framework to be constructed across multiple marine sediment cores. Here we discuss a marine record of eruptive and mass-wasting events spanning similar to 250 ka offshore of Montserrat, using new data from IODP Expedition 340, as well as previously collected cores. By using a combination of high-resolution oxygen isotope stratigraphy, AMS radiocarbon dating, biostratigraphy of foraminifera and calcareous nannofossils, and clast componentry, we identify five major events at Soufriere Hills volcano since 250 ka. Lateral correlations of these events across sediment cores collected offshore of the south and south west of Montserrat have improved our understanding of the timing, extent and associations between events in this area. Correlations reveal that powerful and potentially erosive density-currents traveled at least 33 km offshore and demonstrate that marine deposits, produced by eruption-fed and mass-wasting events on volcanic islands, are heterogeneous in their spatial distribution. Thus, multiple drilling/coring sites are needed to reconstruct the full chronostratigraphy of volcanic islands. This multidisciplinary study will be vital to interpreting the chaotic records of submarine landslides at other sites drilled during Expedition 340 and provides a framework that can be applied to the stratigraphic analysis of sediments surrounding other volcanic islands.

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  • Tephrology (part 3) : Reworking and resedimentation of tephra Reviewed

    S. Kataoka Kyoko, Nagahashi Yoshitaka

    The Quat. Res.   53 ( 3 )   175 - 183   2014.6

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  • Tephrology (part 2) : Simultaneity of tephra deposition Reviewed

    Nagahashi Yoshitaka, S. Kataoka Kyoko

    The Quat. Res.   53 ( 2 )   111 - 116   2014.4

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  • Tephrology (part 1) : Terminology Reviewed

    Nagahashi Yoshitaka, S. Kataoka Kyoko

    The Quat. Res.   53 ( 2 )   103 - 109   2014.4

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  • Luminescence dating of scoria fall and lahar deposits from Somma-Vesuvius, Italy Reviewed

    Sumiko Tsukamoto, Kyoko Kataoka, Takashi Oguchi, Andrew S. Murray, Goro Komatsu

    QUATERNARY GEOCHRONOLOGY   20   39 - 50   2014.4

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    Luminescence dating has been applied to scoria and lahar deposits from Somma-Vesuvius, Italy. Samples include scoria from the AD472 and 512 (or 536) eruptions and lahar deposits. In order to find a stable luminescence signal which is less affected by anomalous fading, infrared stimulated luminescence (IRSL) signals at elevated temperatures after bleaching with IR at 50 degrees C (termed post-IR IRSL; pIRIR) were tested at different preheat and elevated stimulation temperatures. The fading rates of both IRSL and pIRIR signals reduced dramatically with increasing preheat and pIRIR stimulation temperatures. A pIRIR signal measured at 290 degrees C after a preheat at 320 degrees C (60 s) and an IR stimulation at 50 degrees C (100 s) was selected to calculate the equivalent dose (D-e). The gamma spectrometry results indicate that the U-series nuclides are not in equilibrium and there is a large Ra-226 excess. The dose rates and ages were calculated by assuming a Ra-226 excess (over its parent Th-230) at deposition, and that this unsupported excess then decayed to the present level. The resulting luminescence ages of the two scoria samples agreed with the expected ages, and the ages of the lahar deposits indicate that they are associated with the AD1631 eruption. (C) 2013 Elsevier B.V. All rights reserved.

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  • 猪苗代湖2013年ピストンコアの岩相層序と青灰色粘土の供給源

    長橋良隆, 片岡香子, 廣瀬孝太郎, 神野成美, 中澤なおみ

    共生のシステム   14   18 - 25   2014.3

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  • Geomechanical Characterization of Submarine Volcano-Flank Sediments, Martinique, Lesser Antilles Arc Reviewed

    Sara Lafuerza, Anne Le Friant, Michael Manga, Georges Boudon, Benoit Villemant, Nicole Stroncik, Barry Voight, Matt Hornbach, Osamu Ishizuka

    SUBMARINE MASS MOVEMENTS AND THEIR CONSEQUENCES: 6TH INTERNATIONAL SYMPOSIUM   37   73 - 81   2014

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    Onshore-offshore geophysical studies conducted on Martinique have identified major flank collapse events of Montagne Pelee that generated large submarine mass wasting deposits. Here, we evaluate the preconditioning factors involved in the deformation and failure of marine sediments related to volcano-flank collapse events. We use core logging, sedimentological and geotechnical data of the upper 200 m of core at sites U1397, U1398, U1399 and U1400 drilled during the Integrated Ocean Drilling Program (IODP) expedition 340, west of Martinique. We find that the low hydraulic conductivity of hemipelagic sediment causes low rates of dewatering of turbidites and tephra layers allowing excess pore fluid pressures to persist at depth. Overpressure generation was likely enhanced during major flank collapses, leading to low shear strength and subsequent deformation of large volumes of marine sediments, as found at Site U1400.

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  • ニュージーランド南島で発生した2010年Darfield地震と2011年クライストチャーチ地震による被害

    吉岡祥一, 太田 陽子, 片岡香子

    神戸大学都市安全研究センター研究報告   2014

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  • Correlation of tephra beds in peaty bog sediments on the summit of Mt. Naebasan, central Japan Reviewed

    Urabe Atsushi, S. Kataoka Kyoko

    The Quat. Res.   52 ( 6 )   241 - 254   2013.12

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    Twelve tephra beds (NB1 to NB12) are identified in peaty bog sediments on the summit of Mt. Naebasan, central Japan. Radiocarbon data from the sediments shows that the peaty deposits and tephra beds were deposited during the Holocene. On the basis of petrographic characteristics, refractive index, and chemistry of glass shards, the following correlation with previously reported tephras is suggested : NB3 tephra with Kikai-Akahoya tephra mixed with Myoko-Akakura tephra ; NB8 with Kusatsu-Shirane-Kumakura pumice ; NB10 with Kusatsu sp1-3 tephra ; NB11 with Myoko-Otagirigawa tephra ; and NB12 with Koyaike volcanic ash group C. Glass shard chem- istry suggests that the remaining uncorrelated tephra layers were probably derived either from Asama, Kusatsu-Shirane, Myoko, or Niigata-Yakeyama volcanoes.

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  • Luminescence dating of volcanogenic outburst flood sediments from ASO volcano and Tephric loess deposits, southwest Japan Reviewed

    Sumiko Tsukamoto, Kyoko S. Kataoka, Yasuo Miyabuchi

    Geochronometria   40 ( 4 )   294 - 303   2013.12

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    Luminescence dating has been applied to volcanogenic outburst flood sediments (Takuma gravel bed) from Aso volcano, Japan, and tephric loess deposits overlying the gravel bed. The poly-mineral fine grains (4-11 μm) from loess deposits were measured with pulsed optically stimulated luminescence (pulsed OSL) and post-IR infrared stimulated luminescence (pIRIR) methods, whereas the Takuma gravel bed containing no quartz, was measured with IRSL and pIRIR methods using sand sized (150-200 μm) plagioclase. The loess deposits date back at least to ∼50 ka by consistent IRSL, pIRIR and pulsed OSL ages from the lowermost part of the loess deposits from one section. The ages obtained from the bottom part of the other loess section are not consistent each other. However, we consider that the pIRIR age (72±6 ka) which showed negligible anomalous fading is most reliable, and regard as a preliminary minimum age of the Takuma gravel bed. The equivalent doses (De) for the plagioclase from the Takuma gravel bed have a narrow distribution and the weighted mean of the three samples yield an age of 89±3 ka. This age is in agreement with the last caldera-forming eruption of Aso volcano (∼87 ka) and it is likely that the pIRIR signal has not been bleached before the deposi-tion. IRSL dating without applying pIRIR using small aliquots was also conducted, however, the IRSL signal shows no clear evidence of an additional bleaching during the event of outburst flood from the caldera lake. © 2013 Silesian University of Technology, Gliwice, Poland. All rights reserved.

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  • Impact of lahar on sedimentary environmental changes in the central Tsugaru Plain after the AD 915 eruption of Towada volcano, northeast Japan Reviewed

    ONO Eisuke, KATAOKA Kyoko S., UMITSU Masatomo, SATOGUCHI Yasufumi

    The Quat. Res.   51 ( 6 )   317 - 330   2012.12

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    Drastic changes in the sedimentary environment occurred during the Heian Period (AD 794 to 1192) in the central Tsugaru Plain. Observation of sedimentary facies in trenches of the excavated Jusanmori archaeological site, one of the largest village of the middle Heian Period (around AD1000) in this area, as well as data from subsurface sediments at 21 sites obtained by hand auger, have revealed an extensive distribution of volcaniclastic sands (lahar deposits) abruptly overlying organic-matter rich (peaty) silt and peat in the area. Radiocarbon ages from the peaty silt, mineral compositions, and shape and refractive index of volcanic glass shards show a sudden sedimentary facies change from peaty silt to volcaniclastic sand in the early Heian Period. The volcaniclastic sand bed contains a high proportion of glass shards derived from the Towada-a tephra (AD 915 erup-tion of Towada volcano). This indicates that pre-eruptive low-energy wetland to floodplain in the central Tsugaru Plain was inundated by lahar after the AD915 eruption. The Baegdusan-Tomakomai tephra fall (B-Tm tephra : ∼AD 930 to 940) overlying the lahar deposits implies the termination of the lahar event within decades.<br>In the central Tsugaru Plain, many archaeological sites appear above the horizon of the volcaniclastic sand bed (i.e., lahar sediments after the 915 eruption). This is probably because the extensive sandy plains formed by lahar events were preferable places to settle for Heian people and eventually caused an increase in habitants in the area.

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  • Heat flow in the Lesser Antilles island arc and adjacent back arc Grenada basin Reviewed

    Michael Manga, Matthew J. Hornbach, Anne Le Friant, Osamu Ishizuka, Nicole Stroncik, Tatsuya Adachi, Mohammed Aljahdali, Georges Boudon, Christoph Breitkreuz, Andrew Fraass, Akihiko Fujinawa, Robert Hatfield, Martin Jutzeler, Kyoko Kataoka, Sara Lafuerza, Fukashi Maeno, Michael Martinez-Colon, Molly McCanta, Sally Morgan, Martin R. Palmer, Takeshi Saito, Angela Slagle, Adam J. Stinton, K. S. V. Subramanyam, Yoshihiko Tamura, Peter J. Talling, Benoit Villemant, Deborah Wall-Palmer, Fei Wang

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS   13 ( GC004260 )   2012.8

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    Using temperature gradients measured in 10 holes at 6 sites, we generate the first high fidelity heat flow measurements from Integrated Ocean Drilling Program drill holes across the northern and central Lesser Antilles arc and back arc Grenada basin. The implied heat flow, after correcting for bathymetry and sedimentation effects, ranges from about 0.1 W/m(2) on the crest of the arc, midway between the volcanic islands of Montserrat and Guadeloupe, to &lt;0.07 W/m(2) at distances &gt;15 km from the crest in the back arc direction. Combined with previous measurements, we find that the magnitude and spatial pattern of heat flow are similar to those at continental arcs. The heat flow in the Grenada basin to the west of the active arc is 0.06 W/m(2), a factor of 2 lower than that found in the previous and most recent study. There is no thermal evidence for significant shallow fluid advection at any of these sites. Present-day volcanism is confined to the region with the highest heat flow.

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  • Large-scale internal structure of the Sanbongi Fan-Towada Volcano, Japan: Putting the theory to the test, using GPR on volcaniclastic deposits Reviewed

    Christopher Gomez, Kyoko S. Kataoka, Kenji Tanaka

    JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH   229   44 - 49   2012.6

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    The Towada Caldera Volcano is located between the prefectures of Aomori and Akita - Northeast Honshu Island, Japan. The caldera, today filled by a lake, has produced 15,000 years ago a complex eruption emplacing an ignimbrite topped by the lake outburst flood deposit, through which the present Oirase River erodes. This flood deposit has shaped the geomorphologic feature named Sanbongi Fan, on which Towada City extends. This flood event hypothesis is mainly based on sedimentological and geomorphological evidences of floods mainly from outcrops retrieved from the Sanbongi Fan area. Because of the lack of extended outcrops - typical of the Japanese environment - the present paper has therefore put the theory to the test using GPR (Ground Penetrating Radar) radargram extending along a 640 m length. The GPR used for the survey was a Pulse-ekko-Pro with 50 MHz antennas, and the software Reflex was used to process the data. The radargrams have displayed a sole unit, which the GPR could not penetrate. It can be interpreted as the ignimbrite. On top of this deposit a series of subhorizontal layers, with the alternation between a backset and a foreset extends between 5 m and 3 m depth. Above 3 m, the units are regular and subhorizontal. The deposit is also characterized by the extensive presence of boulders, which are located along three bands: (1) on top of the ignimbrite; (2) in the units deposited by the outburst flood, between 3 and 5 m depths; (3) and in the units close to the surface, although part of these punctual elements are most certainly anthropogenic. Compared with the outcrops, the present research confirms that the material located above the ignimbrite material have been deposited by the outburst flood, creating large-sheet patterns, which have transported boulders. These sheets display backset and foreset patterns, depending on the position of the deposit, indicating flow pulsation or surges under a 'high-energy-flow' condition. (C) 2012 Elsevier B.V. All rights reserved.

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  • A linkage between source volcanoes and alluvial basins, based on the facies and thickness variations of distal tephra beds of the Plio-Pleistocene Second Setouchi Supergroup, central Japan Reviewed

    Kataoka Kyoko S., Nagahashi Yoshitaka

    Jour. Geol. Soc. Japan   118 ( 3 )   139 - 156   2012.3

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    Few of the Japanese Pliocene to early Pleistocene tephra beds have been correlated to their source volcanoes, mainly because of the rapid degradation of proximal ejecta after eruptions. The present paper discusses the source areas of non-marine, distal tephra beds intercalated in the Plio-Pleistocene Second Setouchi Supergroup, central Japan, by focusing on the facies and thickness variations of both pyroclastic fall deposits and fluvially reworked deposits. Many of the examined tephra beds have thick (1—10 m) reworked/resedimented portions, indicating the transportation and deposition of tephra material by fluvial activity—a significant process during tephra bed formation. The tephra beds are divided into the following types based on the ratio of the thickness of the primary fall part to that of the reworked part: A-type, tephra consisting mainly of reworked part; B-type, reworked part dominant; C-type, fall part dominant; and D-type, tephra consisting mainly of fall part. The presence of pumice pebbles and cobbles in an A-type bed suggests the tephra was derived mainly from the resedimentation of ignimbrite emplaced by the nearest source volcano. The C- and D-type beds indicate eruptive activity at distant volcanic areas, with the consequence that the alluvial area received ashfall only. The present results indicate that 15 of the examined tephra beds were derived from large ignimbrites, and 5 from southern Kyushu or Tohoku (mainly distal ashfall). Thus, the sedimentology of distal resedimented tephra beds provides important clues (although indirect) to the source area, eruptive style, history, magnitude, and paleogeographical background of ancient tephras and eruptions.

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  • Influence of a volcanogenic flood event on an alluvial depositional system: the Holocene Echigo Plain of northeast Japan Reviewed

    Urabe Atsushi, Fujimoto Yusuke, Kataoka Kyoko S.

    Jour. Geol. Soc. Japan   117 ( 9 )   483 - 494   2011.9

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    The Echigo Plain, which faces the Sea of Japan in northeast Japan, is a typical coastal plain with numerous sand dunes. We examined the sedimentology of pumiceous sediments (lahar deposits) in the Agano River area of the Echigo Plain, derived mainly from a large-scale dam-break flood after the Numazawako eruption (about 5 ka), using an existing borehole dataset and facies analysis of sediment cores.<br>The lahar deposits show different sedimentary facies in coastal areas versus the shallow marine environment. Coarse-grained pumiceous sediments (5—8 m thick) are interpreted to have been deposited under the delta front or in a delta plain environment in a coastal area. Sandy silt deposits (pro-delta facies), including pyroclastic material (horizons of concentrated volcanic glass shards and heavy minerals), are distributed in the shallow sea area.<br>The large volumes of volcaniclastic sediment delivered during the flood event induced the rapid progradation of the delta system in the Agano River region. The deposition of volcaniclastic sediments in the shallow sea also caused progradation of the delta system and changed the coastal landforms along the margin of the Echigo Plain.<br>The flood event resulted in an increase in the progradation rate of the depositional system from 0.9 to 2.5 km per 1000 years. An understanding of large-scale pyroclastic resedimentation can contribute to evaluating and predicting the volume of sediment discharge and the nature of hazards created by a volcanogenic flood and its aftermath in an alluvial plain setting.

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  • Large-scale lahar and pyroclastic flow deposits of Yakedake Volcano Group, central Japan Reviewed

    Oikawa Teruki, Ishizaki Yasuo, S. Kataoka Kyoko

    Jour. Geol. Soc. Japan   116 ( 補遺 )   49 - 61   2010.12

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  • Self-accelerating turbidity currents at laboratory scale Reviewed

    H. Naruse, O. Sequeiros, M. H. Garcia, G. Parker, N. Endo, K. S. Kataoka, M. Yokokawa, T. Muto

    RIVER, COASTAL AND ESTUARINE MORPHODYNAMICS: RCEM 2007, VOLS 1 AND 2   1   473 - 476   2008

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    It has been suggested that the sustainability of turbidity currents is derived from self-sustainment of the flow. This self-sustainment can be realized through the process of acceleration of the current as it increases its own density due to the incorporation of sediment eroded from the substrate. Although self-sustaining turbidity currents have been predicted theoretically, experimental turbidity currents to date have all been net-depositional decelerating flows. We report here the results of experiments on self-sustaining turbidity currents. In order to produce non-depositional flows, we modeled the sediment using two types of plastic particles with densities that were much lower (1.3 and 1.5 g/cm(3)) than that of silicielastic sands. After the bed was covered with sediment, a mixture of sediment and water was injected to produce a turbidity current at the upcurrent end of the flume. As a result, some experimental flows showed acceleration, and measurements using siphons revealed that the sediment concentration of the flow increased downcurrent, so indicating a trend toward self-sustaining turbidity currents.

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  • Breakout flood from Crater Lake of Ruapehu volcano, 18th March 2007, New Zealand(Pictorial) Reviewed

    Kataoka Kyoko S, Manville Vern

    Journal of the Geological Society of Japan   113 ( 12 )   XIX - XX   2007.12

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    DOI: 10.5575/geosoc.113.12.XIX_XX

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  • 東新潟ガス田の中部更新統~完新統の層序-特に軽石層の特徴とその給源- Reviewed

    卜部厚志, 安井賢, 稲葉充, 片岡香子, 高濱信行, 満田信一

    石油技術協会誌   71 ( 4 )   337 - 348   2006.12

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  • 堆積物から紐解く自然災害 Invited

    後藤和久, 片岡香子, 藤原治, 白井正明, 七山太

    月刊地球   28 ( 8 )   505 - 506   2006.8

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  • Facies and geomorphic analyses of resedimented volcaniclastic deposits: post-eruptive volcanogenic floods and hazards Invited

    Kataoka, K.S, Urabe, A, Kajiyama, A, Manville, V

    Earth Monthly   28 ( 8 )   507 - 511   2006.8

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  • 山古志地域の地震被害

    卜部厚志, 高濱信行, 本郷美佐緒, 鈴木幸治, 片岡香子, 安井賢

    地団研専報   54   60 - 67   2005.12

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  • 小千谷・川口地域の地震被害

    荒川勝利, 堀川秀夫, 山崎興輔, 吉越正勝, 卜部厚志, 高濱信行, 本郷美佐緒, 鈴木幸治, 片岡香子, 安井賢, 川邊孝幸

    地団研専報   54   68 - 77   2005.12

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  • Earthquake hazards and property damages induced by the Niigata Chuestu Earthquake in 2004 Reviewed

    HONGO Misao, URABE Atsushi, KATAOKA Kyoko, SUZUKI Koji, TAKAHAMA Nobuyuki

    Earth Scien   59 ( 1 )   3 - 4   2004.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Association for the Geological Collaboration in Japan  

    DOI: 10.15080/agcjchikyukagaku.59.1_3

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  • Flow transformation and depositional organization of debris flow-hyperconcentrated flow-streamflow spectrum in volcanic fan-delta setting:The Pleistocene Lower and Middle Formations, Yachiho Group, central Japan Reviewed

    Kataoka Kyoko, Nakajo Takeshi

    Jour. Sed. Soc. Japan   59 ( 59 )   17 - 26   2004

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    The volcanic, lacustrine fan-delta deposits in the Pleistocene Lower and Middle Formations of the Yachiho Group, central Japan commonly include debris-flow and hypercon-centrated-flow deposits in the upper fan-delta-plain facies. The hyperconcentrated-flow deposits are recognized by its characteristics and depositional organization with debris-flow and streamflow deposits. Hyperconcentrated-flow deposits usually coexist with cohesionless debris-flow deposits. This indicates that the generation and depositional processes of hyperconcentrated flow are closely related to cohesionless debris flow in the volcanic fan-delta setting. A depositional organization comprising cohesionless debris-flow deposits, hyperconcentrated-flow deposits, and normal streamflow deposits, in ascending order, is commonly observed. This organization indicates the longitudinal segmentation of the composite flows. Cohesionless debris flow preceded dilute hypercon-centrated flow followed by a streamflow that segregated from the initial debris flow.

    DOI: 10.4096/jssj1995.59.17

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  • Volcaniclastic remobilization and resedimentation in distal terrestrial settings in response to large-volume rhyolitic eruptions: examples from the Plio-Pleistocene volcaniclastic sediments, central Japan. Reviewed

    Kataoka, K

    Journal of Geosciences, Osaka City University   46   49 - 67   2003.3

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  • Correlation of the Km3 tephra from the Kitaura Formation with the Om-SK110 wide-spread tephra, Oga Peninsula, Akita prefecture, Japan Reviewed

    Nagahashi, Y, Kataoka, K, Yoshikawa, S, Sato, T

    Journal of Geological Society of Japan   第108巻 ( 11 )   761 - 764   2002.11

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    Stratigraphic horizon of the Km3 tephra layer intercalated in the lower part of the Kitaura Formation, Akita Prefecture, Japan, is located above the calcareous nannofossil datum plane 11 (1.65Ma). The Km3 tephra layer, approximately 1m thick, is mainly composed of volcanic glass shards with minor amounts of plagioclase, quartz and biotite. On the basis of the stratigraphic position, lithofacies, petrographic characteristics and chemical composition of glass shards, the Km3 tephra layer is correlated to the Om-SK110 Tephra (1.65Ma). By this result, it is clarified that the Km3 tephra layer was transported more than 450km away from its probable volcanic center situated in the Hida Mountain Ranges, central Honshu Island.

    DOI: 10.5575/geosoc.108.11_761

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    Other Link: http://hdl.handle.net/10191/17815

  • Resedimentation and redistribution of volcaniclastic sediments related to explosive eruptions Invited

    Kataoka, K, Nakajo, T

    Earth Monthly   23 ( 9 )   619 - 623   2001.9

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  • The volcanic ash layer resedimented by turbidity currents in the Osaka Group, Osaka, Japan Reviewed

    Sakamoto Takahiko, Moriyama Yoshihiro, Kataoka Kyoko

    Chikyu Kagaku   55 ( 3 )   173 - 181   2001

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    The Plio-Pleistocene Osaka Group, consisting of gravel, sand and mud with intercalation of several tens of volcanic ash layers, has been considered as fluvial to shallow bay sediments. The volcanic ash layer examined in this study is located at Tondabayashi City, southern Osaka, and can be correlated to Sayama volcanic ash layer by lithofacies and petrographic characteristics including mineral composition, heavy mineral composition, and refractive index of volcanic glass. This ash layer is intercalated in the mud layer interpreted to be bay floor deposits. The volcanic ash layer consists of five units namely unit I, II, III, IV, and V, which range in thickness from 1 to 4 centimeters. The unit I is composed of coarse sand to medium sand sized volcanic materials, and shows normal grading. The basal boundry is comformable. The depositional process of the unit I is derived from direct pyroclastic air fall deposition. The unit II, III and IV are composed of very coarse sand to silt sized volcanic materials, show normal grading with parallel- and cross-lamination and form incomplete Bouma Sequence (e.g. Ta, Tb, Tc, Td). These units show laterally discontinuation and changes of thickness and basal boundaries are erosive. Mud clasts included in unit II and III are divided into two types. One is white and is composed of silt sized volcaniclastics, and the other is black to dark gray and consists of non-volcaniclastic materials. Both mud clasts are interpreted as rip up clasts. These characteristics are suggestive of a turbidite, and therefore, the depositional process of the unit II, III and IV is derived from resedimentation by turbidity current on the bay floor rather than from direct pyroclastic air-fall deposition. The unit V consists of alternating beds of thin volcanic materials and mud layers. This unit is the distal facies of turbidites.

    DOI: 10.15080/agcjchikyukagaku.55.3_173

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  • Depositional processes of the debris-flow and hyperconcentrated flow deposits, the Ebisutoge-Fukuda tephra (Karegawa volcanic ash) in the Tokai Group, Plio-Pleistocene boundary, central Japan Reviewed

    Kataoka, K, Nakajo, T

    Journal of Geological Society of Japan   第106巻 ( 12 )   897 - 900   2000.12

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    Hyperconcentrated flow deposit, in the Ebisutoge-Fukuda tephra from Mie Prefecture, is thought to be deposited from dilution of the debris flow. Debris-flow deposit (facies A) is overlain by hyperconcentrated flow deposit (facies B). Typical hyperconcentrated flow deposit (facies B1 ; horizontal bedding part) changes upward into diluted hyperconcentrated flow deposit (facies B2 ; scour and fill structure part). These facies characteristics indicate that the debris flow changed through hyperconcentrated flow into normal streamflow by dilution during flow traveling.

    DOI: 10.5575/geosoc.106.897

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    Other Link: http://hdl.handle.net/10191/17814

  • Kd 38 volcanic ash bed intercalated in the lower part of the Kazusa Group in the Boso Peninsula, central Japan: Re-examination for the correlated volcanic ash bed Reviewed

    Satoguchi, Y, Watanabe, M, Nakajo, T, Kataoka, K

    Journal of Geological Society of Japan   第106巻   189 - 204   2000.3

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    DOI: 10.5575/geosoc.106.189

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  • 大阪市天王寺区夕陽丘600mボーリングコアの岩相・火山灰層序 Reviewed

    吉川周作, 佃栄吉, 三田村宗樹, 中川康一, 水野清秀, 東脇愛子, 片岡香子, 高橋誠

    地質調査所月報   第48巻 ( 12 )   661 - 672   1997.12

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    Language:Japanese   Publisher:経済産業省産業技術総合研究所地質調査所  

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  • Fluvial terrace deposits along the Suzuka River, Mie Prefecture, central Japan: Chronology of terrace rarely intercalated with volcanic ash Reviewed

    Kataoka, K, Yoshikawa, S

    The Quaternary Research   第36巻 ( 4 )   263 - 276   1997.10

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    In the distal areas from Quaternary volcanoes, like the Shikoku, Kinki and Tokai districts of western Japan, studies on terraces have not progressed due to lack of visible volcanic ash. Those studied were mainly approached from the geomorphological point of view, and therefore it is difficult to determine absolute ages and correlations between terraces. In the Suzuka river area, which is located in the west coast area of Ise Bay, there are no reports on terrace deposits with intercalated volcanic ash layers or on the absolute age of terraces.<br>In this study, we took a comprehensive approach, integrating aerial-photo interpretation, investigation on the geology and geomorphic features, and analysis of volcanic glasses which are included in finer deposits overlying the terrace gravels. (Finer deposits here means those mainly consist of eolian deposits and formed after terracing.) The following results were obtained.<br>1. The terraces of the Suzuka river area are classified into five, namely, Otani-ike terrace, Maruoka-ike terrace, Kambe terrace, Seki terrace, and Furu-umaya terrace in descending order of elevation. Kambe terrace is further subdivided into three terraces named Kambe 1, Kambe 2, and Kambe 3. Seki terrace is also subdivided, into Seki 1 and Seki 2.<br>2. Finer deposits overlying terrace gravels can be characterized by their color. At Otani-ike terrace and Maruoka-ike terrace, finer deposits are subdivided into reddish brown, yellowish brown, and dark brown units in ascending order. And at Kambe terrace, finer deposits are subdivided into yellowish brown and dark brown units in ascending order. At both Seki terrace and Furu-umaya terrace, all finer deposits show dark brown to black color.<br>3. At Otani-ike terrace and Maruoka-ike terrace, reddish brown units contain few volcanic glass. The yellowish brown units in Otani-ike terrace, Maruoka-ike terrace, and Kambe terrace include volcanic glasses that can be correlated with Aira-Tn volcanic ash (25-21ka). The blackish units in Otani-ike terrace, Maruoka-ike terrace, Kambe terrace, Seki terrace, and Furu-umaya terrace contain volcanic glasses which derived from Kikai-Akahoya volcanic ash (6.3ka).<br>4. In Seki terrace deposit, one tephra layer was identified with Aira-Tn volcanic ash. A previous study reported intercalation of marine clay in the Kambe terrace deposit. Together with the characteristics of volcanic glasses included in finer deposits, it is clear that Otani-ike and Maruoka-ike terrace deposits were formed before the Last Interglacial, Kambe terrace deposit during the Last Interglacial, Seki terrace deposit during the Last Glacial, and Furu-umaya terrace deposit after the Last Glacial.

    DOI: 10.4116/jaqua.36.263

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Books

  • 最新 地学事典

    ( Role: Contributor)

    2024.3  ( ISBN:9784582115086

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  • The Encyclopedia of Geography

    The Association of, Japanese Geographers( Role: Contributor ,  Part II. 3. Geosphere– surficial geology and stratigraphy, p. 238–239.)

    Maruzen Publishing Co.,Ltd.  2023.1  ( ISBN:9784621307939

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    Total pages:xxii, 818p   Language:Japanese

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  • Field Manual: The World of Sedimentary Structures

    Makoto Ito (ed.)( Role: Joint editor ,  Chapter 4: Volcaniclastic deposits)

    Asakura Publishing Co., Ltd.  2022.7  ( ISBN:9784254162790

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    Total pages:ix, 210p   Language:Japanese

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  • 裏磐梯・猪苗代地域の環境学

    長橋良隆, 片岡香子, 中澤なおみ( Role: Contributor ,  猪苗代湖湖底堆積物コア(INW2012)からみた猪苗代湖の形成と年代)

    福島民報社  2016.3 

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Presentations

  • 2018年草津白根火山噴火に関する総合調査 --草津白根山火山噴火から1年--

    小川 康雄, 青山 裕, 山本 希, 筒井 智樹, 寺田 暁彦, 大倉 敬宏, 神田 径, 小山 崇夫, 金子 隆之, 大湊 隆雄, 石崎泰男, 吉本 充宏, 石峯 康浩, 野上 健治, 森 俊哉, 木川田 喜一, 片岡 香子, 松元 高峰, 上石 勲, 山口 悟, 伊藤 陽一, 常松 佳恵

    自然災害科学総合シンポジウム講演論文集  2019.9  京都大学防災研究所自然災害研究協議会

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    Event date: 2019.9

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    草津白根山では, 近年の火山活動が湯釜火口周辺に限定されていた。2014年からは, 湯釜火口周辺で活動が高まり, 山体の膨張を伴う地震活動, 熱活動, 火山ガス成分の変化が観測され, 2年後には活動が終息した。一方で, 1500年間活動のなかった本白根山鏡池北火口で, 2018年1月23日に顕著な前駆的活動を伴わない水蒸気噴火が発生し, 人的な被害が生じた。この噴火を受けて2018年度, 2019年度に, 地震学・測地学・地球電磁気学・地球化学・地質学に渡る科研費研究が実施された。噴火に先立って前兆的な現象の有無について, それぞれの分野で検討がなされた。また水蒸気噴火後にマグマ噴火への移行の可能性もありモニタリング研究を継続したが, 現状では, 本白根火山鏡池北火口の再活動の兆しは見当たらない。一方, 草津白根山湯釜火口付近は, 2018年4月, 同9月, 2019年5月に傾斜変動を伴う地震活動が発生し, 再び活動的になってきている。

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  • Volcano-snow interaction and lahar hazard assessment following the 2018 eruption at Kusatsu-shirane volcano

    Kataoka Kyoko S, Tsunematsu Kae, Matsumoto Takane, Urabe Astushi, Kawashima Katsuhisa, Nagahashi Yoshitaka

    PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN  2018  The Volcanological Society of Japan

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  • Effect of volcano edifice collapse on magma system —preliminary report on Asama volcano—

    Ishizuka O., Maeno F., Kataoka K.S.

    PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN  2018  The Volcanological Society of Japan

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    Event date: 2018

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  • Geological evolution of the Archean Chitradurga schist belt, Dharwar Craton, southern India

    SATISH-KUMAR Madhusoodhan, MISHIMA Kaoru, TOYOSHIMA Tsuyoshi, KOINUMA Kentaro, ENYA Yoshiihiro, MURAMATSU Itsuki, HOKADA Tomokazu, UENO Yuichiro, KAMEI Atsushi, KATAOKA Kyoko, SAJEEV Krishnan

    日本地球惑星科学連合大会予稿集(Web)  2016 

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  • Buried forest of postglacial transgression discovered at lower part of the Iwaki River

    KOIWA Naoto, TAKAHASHI Mio, ONO Eisuke, KATAOKA Kyoko

    Proceedings of the General Meeting of the Association of Japanese Geographers  2016  The Association of Japanese Geographers

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  • Igneous activity of Paleoarchean TTGs around Chitradurga, western Dharwar craton, India

    KAMEI Atsushi, HOKADA Tomokazu, SATISH-KUMAR Madhusoodhan, TOYOSHIMA Tsuyoshi, MISHIMA Kaoru, UENO Yuichiro, KATAOKA Kyoko

    日本地球惑星科学連合大会予稿集(Web)  2016 

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  • Post-eruption sediment transport at a snow-clad volcano

    Kataoka Kyoko S., Matsumoto Takane, Saito Takeshi, Kawashima Katsuhisa, Iyobe Tsutomu, Sasaki Akihiko, Suzuki Keisuke, Nagahasi Yoshitaka

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

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  • Research Activitiesof OntakeVolcanofromthe Viewpoint of Snow-Volcano Interrelations

    Kawashima Katsuhisa, Iyobe Tsutomu, Matsumoto Takane, Kataoka Kyoko S., Izumi Kaoru, Sasaki Akihiko, Suzuki Keisuke, Saito Takeshi

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

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  • Rain-triggered lahar and rain-on-snow runoff events after the 2014 eruption of Ontake volcano, central Japan

    Kataoka Kyoko S., Matsumoto Takane, Saito Takeshi, Kawashima Katsuhisa, Iyobe Tsutomu, Sasaki Akihiko, Suzuki Keisuke, Nagahashi Yoshitaka

    Annual Meeting of the Geological Society of Japan  2015  The Geological Society of Japan

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  • Megascopic geological structures of Chitradurga Schist Belt, Western Dharwar Craton, Southwestern India

    Toyoshima Tsuyoshi, Satish-Kumar Madhusoodhan, Hokada Tomokazu, Mishima Kaoru, Kataoka Kyoko, Kamei Atsushi

    Annual Meeting of the Geological Society of Japan  2015  The Geological Society of Japan

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  • Event deposit of the alluvial sediments in the coastal area of Toyama Bay

    Urabe Atsushi, Takashimizu Yasuhiro, Suzuki Kouji, Kataoka Kyoko, Nishina Kenji, Kawakami Geotaro, Hirakawa Kazuomi, Sakai Hideo

    Annual Meeting of the Geological Society of Japan  2015  The Geological Society of Japan

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  • Distribution of Snow Water Equivalent on Mt. Ontake

    Iyobe Tsutomu, Kawashima Katsuhisa, Matsumoto Takane, Izumi Kaoru, Kataoka Kyoko, Sasaki Akihiko, Suzuki Keisuke, Saito Takeshi

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

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  • B1-21 Geomorphology and sedimentary features of lahar deposits at the northern foot of Chokai volcano, NE Japan

    Minami Yusuke, Ohba Tsukasa, Hayashi Shintaro, Kataoka Kyoko S.

    Programme and abstracts the Volcanological Society of Japan  2014.11  Volcanological Society of Japan

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    Event date: 2014.11

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  • A1-30 Frequency and evaluation of large-scale explosive volcanic eruptions based on stratigraphy and petrology of tephra beds in the Plio-Pleistocene, Japan

    NAGAHASHI Yoshitaka, SATOGUCHI Yasufumi, KATAOKA Kyoko

    Programme and abstracts the Volcanological Society of Japan  2014.11  Volcanological Society of Japan

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    Event date: 2014.11

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  • P1-02 Depositional processes of distal volcaniclastic deposits, off Lesser Antilles volcanic arc

    Kataoka Kyoko S., Saito Takeshi

    Programme and abstracts the Volcanological Society of Japan  2014.11  Volcanological Society of Japan

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    Event date: 2014.11

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  • インド南西部太古代後期ダールワール岩体西部,チトラドゥルガ地域のペニンシュラ片麻岩体・花崗岩体・結晶片岩の変形作用

    豊島剛志, SATISH-KUMAR M., 外田智千, 片岡香子, 亀井淳志

    日本地質学会学術大会講演要旨  2014 

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  • B1-08 Lahar deposit in the northern foot of Chokai volcano

    Minami Yusuke, Ohba Tsukasa, Hayashi Shintaro, Kataoka Kyoko S.

    Programme and abstracts the Volcanological Society of Japan  2013.9  Volcanological Society of Japan

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    Event date: 2013.9

    Language:Japanese  

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  • B1-09 Volcaniclastic turbidites from the Roseau Tuff Eruption, Dominica : stratigraphy and grain characteristics of IODP Site U1398 cores

    Maeno F., Ishizuka O., Kataoka K. S., Le Friant Anne, Boudon Georges, Villemant Benoit, Shipboard scientists of IODP Expedition 340

    Programme and abstracts the Volcanological Society of Japan  2013.9  Volcanological Society of Japan

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    Event date: 2013.9

    Language:English  

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  • 津軽平野の地形発達と遺跡の消長

    小野映介, 片岡香子

    日本第四紀学会講演要旨集  2013 

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  • Large-scale internal structure in volcanogenic breakout flood deposits: Applications for Ground Penetrating Radar survey on volcaniclastic deposits

    Kataoka Kyoko S., Gomez Christopher

    Annual Meeting of the Geological Society of Japan  2012  The Geological Society of Japan

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    Event date: 2012

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  • Lahar deposits emplaced after Kisakata debris avalanche at the foot of Chokai volcano.

    Minami Yusuke, Ohba Tsukasa, Hayashi Shintaro, Kataoka Kyoko S.

    Annual Meeting of the Geological Society of Japan  2012  The Geological Society of Japan

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    Event date: 2012

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  • Post-eruptive outburst floods from caldera volcanoes and lahar hazards

    KATAOKA Kyoko S.

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences  2011.9  Japan Association of Mineralogical Sciences

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    Event date: 2011.9

    Language:Japanese  

    Catastrophic outburst floods by a breach of volcanic dam or caldera rim tend to be hazardous with voluminous impounded water and loose unconsolidated pyroclastic material. Such extreme floods can travel long distance from the source volcano that ultimately affect landform and hydrology of downstream areas and eventually threaten human life and economy. Tohoku area hosting active volcanoes is susceptible for such a catastrophic flood by dam break as shown by two examples from Numazawa and Towada calderas.

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  • Holocene terrace and meander belt formation in the Tsugaru Plain, North east Japan

    ONO EISUKE, KATAOKA KYOKO

    Proceedings of the General Meeting of the Association of Japanese Geographers  2011  The Association of Japanese Geographers

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    Event date: 2011

    Holocene terrace and meander belt formation in the Tsugaru Plain, North east Japan

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  • O-27 Influence of explosive volcanism on fluvial depositional systems : Views from volcaniclastic sedimentology and paleoflood research

    Kataoka Kyoko S.

    2008.9  The Geological Society of Japan

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    Event date: 2008.9

    Language:Japanese  

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  • Volcaniclastic resedimentation after the 50 ka ignimbrite eruption of Numazawa volcano along the Tadami and Agano Rivers, northest Japan

    baba ayaka, urabe atsushi, kataoka kyoko.s

    Annual Meeting of the Geological Society of Japan  2008  The Geological Society of Japan

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    Event date: 2008

    Language:Japanese  

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  • 火山山中の滝壷堆積物に記録されたラハールイベント:イタリア・ベスビオ火山北麓の例

    片岡香子, 小口高, 小松吾郎, 塚本すみ子, 森島済, 青木賢人, LIN Zhou, 早川裕一

    日本堆積学会例会プログラム・講演要旨  2007 

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    Event date: 2007

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  • Flood control effect of the riparian forest along the Tarlac River, central Luzon Island, the Philippines:controlling lahar sediment from Pinatubo volcano

    AOKI Tatsuto, MORISHIMA Wataru, KATAOKA Kyoko, OGUCHI Takashi

    Proceedings of the General Meeting of the Association of Japanese Geographers  2007  The Association of Japanese Geographers

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    Event date: 2007

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  • O-220 Liquefaction damage on high-water channel of the Shinano River, induced by the Niigata Chuetsu Earthquake in 2004, Niigata, Japan

    HONGO Misao, KATAOKA Kyoko S., URABE Atsushi, Suzuki Koji

    Annual Meeting of the Geological Society of Japan  2006  The Geological Society of Japan

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    Event date: 2006

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  • Sedimentology and paleohydrology of a large-scale volcanogenic flood, in the Numazawako eruption aftermath, northeast Japan

    Kataoka Kyoko S., Urabe Atsushi, Kajiyama Atsushi, Manville Vern

    Annual Meeting of the Geological Society of Japan  2005  The Geological Society of Japan

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    Event date: 2005

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  • The change of depositional system by event sedimentation in the Niigata Plain, northeast Japan

    URABE Atsushi, KATAOKA Kyoto

    Annual Meeting of the Geological Society of Japan  2005  The Geological Society of Japan

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    Event date: 2005

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  • A18 Supra- and pro-ignimbrite volcaniclastic resedimentation after the Numazawako eruption, Numazawa volcano, northeast Japan

    Kataoka Kyoko, Urabe Atsushi

    PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN  2004  The Volcanological Society of Japan

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    Event date: 2004

    Language:Japanese  

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  • Temporal changes of proximal volcaniclastic resedimentation in the aftermath of the 5 ka Numazawa eruption, northeast Japan

    KATAOKA Kyoko, URABE Atsushi

    Annual Meeting of the Geological Society of Japan  2003  The Geological Society of Japan

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    Event date: 2003

    Language:Japanese  

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  • Post-eruptive sedimentary and geomorphic responses to the 5 ka Numazawa eruption : volcaniclastic resedimentation along the Tadami and Agano River, northeast Japan

    URABE Atsushi, KATAOKA Kyoko

    Annual Meeting of the Geological Society of Japan  2003  The Geological Society of Japan

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    Event date: 2003

    Language:Japanese  

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  • P-110 Post-eruptive sedimentary response in distal terrestrial system to explosive rhyolitic eruption : The Pliocene Mushono Volcanic ash layer, central Japan

    KATAOKA Kyoko

    Annual Meeting of the Geological Society of Japan  2002  The Geological Society of Japan

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    Event date: 2002

    Language:Japanese  

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  • O-170 Resedimentation of volcaniclastics related to explosive eruption : An example from the Mushono Volcanic Ash layer, Pliocene, central Japan

    KATAOKA Kyoko

    Annual Meeting of the Geological Society of Japan  2001  The Geological Society of Japan

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    Event date: 2001

    Language:Japanese  

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  • O-172 Depositional processes of the debris-flow and hyperconcentrated-flow deposits : an example from the Lower and Middle Yachiho Formations of the Plio-Pleistocene Yachiho Group, central Japan

    Kataoka Kyoko, Nakajo Takeshi

    Annual Meeting of the Geological Society of Japan  2000  The Geological Society of Japan

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    Event date: 2000

    Language:Japanese  

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  • Eruption styles and reworking processes recorded in the distal tephra. : Ebisutoge-Fukuda tephra, Plio-Pleistocene boundary, central Japan

    KATAOKA Kyoko, NAGAHASHI Yoshitaka

    Annual Meeting of the Geological Society of Japan  1999  The Geological Society of Japan

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    Event date: 1999

    Language:Japanese  

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  • Depositional processes of lacustrine delta in the Koka Formation of the Kobiwako Group

    NAKAJO Takeshi, SATOGUCHI Yasufumi, KATAOKA Kyoko

    Annual Meeting of the Geological Society of Japan  1998  The Geological Society of Japan

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    Event date: 1998

    Language:Japanese  

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  • Reworking processes of the Fukuda volcanic ash layer, Plio-Pleistocene boundary, central Japan

    KATAOKA Kyoko, NAKAJO Takashi, YOSHIKAWA Shusaku

    Annual Meeting of the Geological Society of Japan  1998  The Geological Society of Japan

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    Event date: 1998

    Language:Japanese  

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  • 7 Lateral lithofacies change of volcaniclastics : Fukuda volcanic ash and its correlatives in the horizon close to the Plio-Pleistocene boundary

    KATAOKA Kyoko, YOSHIKAWA Shusaku

    Annual Meeting of the Geological Society of Japan  1997  The Geological Society of Japan

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    Event date: 1997

    Language:Japanese  

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  • 510 Sedimentary facies of terrace deposit include tephra K-Tz : middle terrace in Kwachi-Nagano, Osaka Prefecture

    Sato Takaharu, Bessho Takanori, Sakamoto Takahiko, Fujii Toyoaki, Kayahara Yoshimasa, Kataoka Kyoko, Yoshikawa Shyusaku

    Annual Meeting of the Geological Society of Japan  1996  The Geological Society of Japan

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    Event date: 1996

    Language:Japanese  

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  • Horizontal and low-angle cross-stratifications from volcaniclastic sedimentary sequences: Outburst flood deposits, Numazawa and Ontake volcanoes, Japan Invited International conference

    Kataoka, K

    EGU General Assembly 2017  2017.4 

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    Language:English   Presentation type:Oral presentation (invited, special)  

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  • 火山砕屑堆積学・ラハール堆積学:見落とされていた現象の理解と復元 Invited

    片岡 香子

    日本地質学会  2016.9 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • Reconstructing large-scale volcanogenic floods and its fluvial to shallow marine impacts: sedimentological, geomorphological and paleohydrological approaches Invited International conference

    Kataoka, K.S

    The 7th Latin American Congress of Sedimentology –CLS- and 15th Argentine Meeting of Sedimentology –XV RAS-  2016.9 

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    Language:English   Presentation type:Oral presentation (keynote)  

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  • 火山性大規模洪水の堆積学と地形学:扇状地・段丘形成の別視点 Invited

    片岡 香子

    日本第四紀学会  2014.9 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • Distal sedimentary impacts of large-scale explosive volcanic eruptions: lahar hazards in distal areas Invited International conference

    Kataoka, K.S, Manville, V

    The 17th International Sedimentological Congress  2006.8 

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    Language:English   Presentation type:Oral presentation (invited, special)  

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Awards

  • 日本第四紀学会論文賞

    2013.8   日本第四紀学会  

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • 日本堆積学会論文賞

    2010.3   日本堆積学会  

    片岡香子

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • 地球科学フォト賞

    2006.8   地学団体研究会  

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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Research Projects

  • Lahar flow simulation, scenario models, and hazard assessment of active snow- and ice-clad volcanoes in southern Chile

    Grant number:22KK0067

    2022.10 - 2027.3

    System name:Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

    Research category:Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

    Awarding organization:Japan Society for the Promotion of Science

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    Authorship:Principal investigator 

    Grant amount:\20150000 ( Direct Cost: \15500000 、 Indirect Cost:\4650000 )

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  • Why do volcanoes collapse? Analysis of matrix facies of debris avalanche deposits and prediction of future collapses

    Grant number:22H01306

    2022.4 - 2025.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    Kyoko Kataoka, Yoshitaka Nagahashi, M. Satish-Kumar

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    Authorship:Principal investigator 

    Grant amount:\18200000 ( Direct Cost: \14000000 、 Indirect Cost:\4200000 )

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  • Identification of earthquake-triggered turbidites in lacustrine sedimentary sequences using anisotropy of magnetic susceptibility and micro-XRF analyses

    Grant number:21K18395

    2021.7 - 2024.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)

    Research category:Grant-in-Aid for Challenging Research (Exploratory)

    Awarding organization:Japan Society for the Promotion of Science

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    Authorship:Principal investigator 

    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

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  • テフラ粒子の数値化による新たな広域テフラの検出:500万年間の破局噴火の発生頻度

    Grant number:21K03676

    2021.4 - 2024.3

    System name:科学研究費助成事業 基盤研究(C)

    Research category:基盤研究(C)

    Awarding organization:日本学術振興会

    長橋 良隆, 片岡 香子, 里口 保文

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    Authorship:Coinvestigator(s) 

    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

    本年度は,粒子解析手法の確立と広域テフラである姶良Tn(AT)テフラと阿蘇4(Aso-4)テフラの粒子形状の水平変化について検討した.テフラの粒子解析は,走査型電子顕微鏡(SEM)とそれに接続するエネルギー分散型検出器(EDS),EDSに付属する粒子解析ソフトウェアを用いて行った.粒子解析ソフトウェアでは,構成粒子(火山ガラス,主要造岩鉱物,岩片等の割合)を分類する元素濃度の条件を検討し,その結果90%程度の確率で粒子を判別できた.また,個別粒子の形状に関する項目としては,面積,最大長さ,最小長さ,外周,円相当径,アスペクト比,真円度(1から離れるほど凹凸度合が大きくなる)を取得できる.
    ATテフラとAso-4テフラは,大規模火砕流噴出に伴うco-ignimbriteとして形成されたもので,扁平型の火山ガラスを主体とすることが知られていることから,アスペクト比が形状を規定する示標として重要であると予想される.姶良Tn(AT)テフラについては,噴出源から約400kmから1100kmの 11試料(総粒子数1761)の火山ガラスの粒子形状解析を行い,そのアスペクト比は2.1から2.7(平均2.5)であった.また,給源からの距離に対してアスペクト比に相関がない.阿蘇4(Aso-4)テフラについては,噴出源から約500kmから1500km離れた8試料(総粒子数971)の火山ガラスの粒子形状解析を行い,そのアスペクト比は2.2から2.9(平均2.6)であった.また,給源からの距離に対してアスペクト比に相関がない.2層の広域テフラ層についてのみではあるが,火山ガラスのアスペクト比は両者とも近似する値を示し,給源からの距離に対して大きく変化しないことが分かった.

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  • The reconstruction of formational process of coastal plains and sea level change of Toyama Bay area

    Grant number:19K03987

    2019.4 - 2022.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    URABE ATSUSHI

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    Authorship:Coinvestigator(s) 

    Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )

    Several borehole investigations were carried out in the Imizu Plain along the Toyama Bay coast to reconstruct the sedimentary facies of the Alluvium, the evolution of the sedimentary environment and paleogeography of the area. The results indicate that a narrow sandbar and a muddy lagoon were established near the present shoreline about 7200 years ago, and that the peak elevation of the Jomon sea level in this area was similar to that of the present sea level. The results of the borehole survey in the Uozu buried forest area, combined with the previous borehole results, indicate that the formation of the buried forest in the Uozu area was not caused by climatic change in sea level, but by relative sea-level change (subsidence).

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  • Risk evaluation method for natural disaster considering geomorphic development

    Grant number:18H00764

    2018.4 - 2022.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    Ono Eisuke

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    Grant amount:\16250000 ( Direct Cost: \12500000 、 Indirect Cost:\3750000 )

    The geomorphic development features of the alluvial plains distributed in the Japanese Islands are revealed. From the characteristics of the geomorphic development, We discussed about the risk evaluation method for natural disaster.

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  • Unraveling small-scale eruptions and lahar events by high-resolution stratigraphy of distally deposited volcaniclastic deposits: Re-assessment of eruption frequency and hazard risk areas

    Grant number:18H01291

    2018.4 - 2022.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    Kataoka Kyoko

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    Authorship:Principal investigator 

    Grant amount:\17030000 ( Direct Cost: \13100000 、 Indirect Cost:\3930000 )

    Small-scale eruptions emplace small volume of primary tephra on steep slopes of volcanoes. These proximal tephra deposits are easily degraded due to rainfall, snowmelt, and wind soon after their deposition. Hence, the preservation potential in the geological record is low. This study aims to elucidate the history of small-scale eruptions and related lahars and to evaluate the frequency of eruptions. We analyzed the core samples obtained from the Sukawa Basin, Inawashiro Plain, and Lake Inawashiro in a lower catchment of Adatara and Bandai volcanoes. We recognized a number of lahar deposits and their runout subaqueous deposits, originated from Adatara and Bandai, intercalated in both fluvial and lacustrine sedimentary cores. The radiocarbon dating of these event deposits indicates the presence of unknown and more frequent eruption and lahar events than previously thought, and therefore, it is necessary to reassess the eruptive history and activity at these volcanoes.

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  • Comprehensive Survey of 2018 Kusatsu-Shirane Eruption

    Grant number:17K20141

    2018.2 - 2019.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Special Purposes

    Research category:Grant-in-Aid for Special Purposes

    Awarding organization:Japan Society for the Promotion of Science

    Ogawa Yasuo, Kaneko Takayuki, Ominato Takao, Ishimine Yasuhiro, Matsumoto Takane, Tamaguchi Satoru, Ito Yoichi, Tsunematsu Mae

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    Grant amount:\27040000 ( Direct Cost: \20800000 、 Indirect Cost:\6240000 )

    Motoshirane volcano had phreatic eruption on January 23, 2018 with casualties. This study aimed at the followings: (1) elucidating the eruption mechanism, (2) monitoring and prediction of on-going volcanic activity and (3) assessment of potential lahar. Despite the volcanic tremor two minutes prior to the eruption, we could not find significant precursory seismic activity. We observed temporal tilt changes at the borehole stations and they are explained by a crack inflation and deflation. We observed no anomalous surface temperature at the new vent in March, 2018, however, from the aeromagnetic survey, the temperature of the regional volcanic area at depth seems elevated over the years. The total ejected mass was estimated as 36,000 tons which is 1/10 of that of 2014 Mt. Ontake eruption. From the chemical analyses of the ash, the ejected gas has different origin from known fumaroles. We also made risk assessment of lahar.

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  • Volcano sector collapse: Effect on its magmatic plumbing and eruption style

    Grant number:17K05686

    2017.4 - 2020.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Ishizuka Osamu

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    Loading and unloading of the lithosphere in volcanic settings affects the dynamics of magma generation, storage and eruption. It is critical to improve our understanding of the feedback mechanisms between change in external force to the volcanoes and eruptive activity in order to interpret past volcanic histories and prepare for future hazards at active volcanoes. The purpose of this study is to investigate how the behaviour of magmatic systems is affected by sector collapse of the volcanoes.
    We investigated geochemical composition as well as radiogenic isotope composition of recent volcanic products of Mt. Pelee, Asamayama and Oshimaoshima volcanoes especially focused the period including large-scale flank collapse. Our study for the first time has revealed systematic temporal geochemical variation of magma of each volcano, which could have possible causal link to the large-scale flank collapse.

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  • Radiocesium inventory in the lacustrine sediments collected from Lake Inawashiro-ko, Fukushima Prefecture: Assessment for impacts of the Fukushima Dai-ichi Nuclear Power Plant accident

    Grant number:17K05675

    2017.4 - 2020.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Nagahashi Yoshitaka

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    Authorship:Coinvestigator(s) 

    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

    Radiocesium (134Cs/137Cs) inventory in lacustrine sediment cores collected from 14 sites at Lake Inawashiro-ko after the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident has a range between 33,000 and 93,000 Bq/m2. This value is larger than that of the initial deposition of radiocesium on the ground around Lake Inawashiro-ko due to the FDNPP accident. In addition, there is a positive correlation between radiocesium inventory in lacustrine sediments and its sedimentation rate. The excess radiocesium originated from the FDNPP was supplied from the lake catchment through rivers. The radiocesium accumulation varies among sites according to the topography of the depositional areas.

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  • Sediment transport by volcano-snow-water interaction at snow-clad volcanoes during a pre-eruptive period: a study for the next eruption

    Grant number:16K12846

    2016.4 - 2019.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Research category:Grant-in-Aid for Challenging Exploratory Research

    Awarding organization:Japan Society for the Promotion of Science

    Kataoka Kyoko S., NAGAHASHI Yoshitaka, TSUNEMATSU Kae

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    Authorship:Principal investigator 

    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

    Snow-clad volcanoes have high hazard risks of snow-melt lahars caused by direct eruptions and rain-on-snow-triggered lahars during the snow-melt season after the eruptions. The research project deals with two active volcanoes (Mts. Azuma and Adatara) having thick snowpack during winter, and aims to reveal 1) snowpack characteristics such as altitudinal distribution of snow water equivalent and energy balance at the snow surface and 2) background characteristics of hydrology (discharge, water stage, and water quality) and sediment transport (suspended sediment concentration and turbidity) in rivers downstream of the volcanoes during a pre-eruptive (i.e. inter-eruptive) period.

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  • Science and Disaster Teaching contents of ancient submarine volcano

    Grant number:15K00969

    2015.4 - 2018.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Fujibayashi Norie

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    Grant amount:\4680000 ( Direct Cost: \3600000 、 Indirect Cost:\1080000 )

    Geological study of the Miocene submarine volcano exposed at the Ogi Peninsula, Sado island, Japan, has revealed the emplacement of jumbled sheet flows and pillow lava flows on a flank of flat submarine volcano, and enabled reconstruction of the volcanic activities. The lava flows resemble those formed at the Mid-Ocean Ridges. Teaching contents about this ancient submarine volcano were provided. The contents of disaster science were also suggested from the study of Tsunami deposits at the eastern margin of Japan Sea and from that of the volcanic mudflow (lahar) and slump deposits underwater environments.

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  • 大規模山体崩壊を伴う海域火山の火砕流の流動定置機構とマグマ供給系の解明

    2014.4 - 2016.3

    System name:二国間交流事業・共同研究

    Awarding organization:日本学術振興会

    石塚 治

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    Authorship:Coinvestigator(s)  Grant type:Competitive

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  • 火山噴出物の記載岩石学と火山防災学ワークショップ

    2013.7 - 2014.3

    System name:H25年度公益財団法人内田エネルギー科学振興財団科学技術知識普及事業費助成

    Awarding organization:公益財団法人内田エネルギー科学振興財団

    片岡香子

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    Authorship:Principal investigator  Grant type:Competitive

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  • Response of mountainous rivers to uplift: laboratory experiments

    Grant number:25350424

    2013.4 - 2017.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Endo Noritaka, MATSUSHI Yuki, YANAGITA Tatsuo

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    Authorship:Coinvestigator(s) 

    Grant amount:\4940000 ( Direct Cost: \3800000 、 Indirect Cost:\1140000 )

    Developmental processes of mountainous rivers has not been well understood in comparison to alluvial rivers on plains. In this study, laboratory (model) experiments were conducted under two types of uplift: (1) uplift only in a midstream area and (2) tilting uplift over the whole basin (uplift rate increases landward). Under (1), whether the stream continues to flow inside the uplift area or abandons the uplift area is not determined only by the balance between incision and uplift rates, but controlled by complex reaction due to change in channel networks in surrounding areas. Under (2), difference between timings of long-profile development of a trunk channel and tributaries is unclear in comparison to the case of no uplift.

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  • Geological and isotopic record of Late Archean glaciation and global environmental changes

    Grant number:25302008

    2013.4 - 2017.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    M Satish-Kumar

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    Authorship:Coinvestigator(s) 

    Grant amount:\16640000 ( Direct Cost: \12800000 、 Indirect Cost:\3840000 )

    In the present study, a systematic geological field survey of the Archaean strata of the Dharwar craton, southern India, and its comparison with same age rocks from South Africa was carried out. Important results obtained include, construction of a geological map of Chitradurga Schist Belt, litho- and chronostratigraphy, regional structural evolution, metamorphic evolution, zircon and monazite age dating, analysis of sedimentary structures, whole rock geochemistry and Nd isotope study of volcanic rock units, geochemical studies of TTG gneisses and granites, multiple sulfur isotopes of sedimentary rocks, C, O and S isotope studies of stromatolites, geochemical studies of BIFs and modelling on tectonic evolution.
    Based on the above results, we discuss the possible occurrence of diamictites comparable to the Pongola glaciation in South Africa. Combining the above results, we put forward a comprehensive model on the geological evolution of the Archean western Dharwar craton.

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  • Deciphering the fluctuations of the East Asian winter monsoon since the Medieval Period from dune deposits

    Grant number:24680088

    2012.4 - 2016.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Young Scientists (A)

    Awarding organization:Japan Society for the Promotion of Science

    Tamura Toru, KODAMA Yoshinori, SAITO Yoshiki, INOUE Takahiko, ITO Kazumi, ONO Eisuke, KATAOKA Kyoko, SAKAI Tetsuya, BATEMAN Mark D., NGUYEN Van Lap, TA Thi Kim Oanh

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    Grant amount:\19890000 ( Direct Cost: \15300000 、 Indirect Cost:\4590000 )

    An integrated geological and geophysical survey was carried out in four selected dune fields in Vietnam and Japan to clarify multi-decadal- to centennial-scale fluctuations in the East and Southeast Asian winter monsoon since the Medieval Period. Two distinct periods of the dune activity on the Japan Sea coast were inferred to have occurred during the 10-12th centuries and after the 15th century, correlated with the regional climate changes. The winter monsoon was found to greatly affect the coastal sedimentary system of the South China Sea. Transverse dunes in the Vietnamese dune field poorly record the deposits older than 100 years, while the internal architecture of larger longitudinal dunes is possibly useful for deciphering the long-term fluctuations in the winter monsoon.

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  • Fluvial response to an eruption: geomorphology and sedimentology of caldera lake breakouts and rain-triggered lahars

    Grant number:24710200

    2012.4 - 2015.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

    Research category:Grant-in-Aid for Young Scientists (B)

    Awarding organization:Japan Society for the Promotion of Science

    KATAOKA Kyoko, S.

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    Authorship:Principal investigator 

    Grant amount:\4810000 ( Direct Cost: \3700000 、 Indirect Cost:\1110000 )

    Lahars derived from caldera volcanoes tend to be large and hazardous. Sedimentary architectures, depositional patterns, and bedforms of the lahar deposits, therefore, are important to understand properties, processes and mechanisms of large-scale hazardous flows. The present study carried out a Ground Penetrating Radar (GPR) survey on lahar deposits with approaching from geomorphological and sedimentological analysis. The results shows that 1) the GPR survey successfully obtained GPR images even with the complicated grainsize distribution and component in the lahar deposits, and 2) volcanic breakout flood deposits caused by large water discharge and rain-triggered lahar deposits can be differentiated by patterns in GPR images.

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  • Teaching on volcanism and formation of igneous rocks, linked to physical and chemical concepts.

    Grant number:24501043

    2012.4 - 2015.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    FUJIBAYASHI Norie, KATAOKA s. kyoko, KOBAYASHI Akizo

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    Authorship:Coinvestigator(s) 

    Grant amount:\5330000 ( Direct Cost: \4100000 、 Indirect Cost:\1230000 )

    Teaching on the "volcanism" and "formation of igneous rocks", using physical and chemical concepts, should be designed in present-day Japanese science education. Our attempts resulted as follow: (1) Image teaching materials of the volcanic rocks and pyroclasts to teach crystallization and vesiculation based on saturation concept were published in WEB page. (2) Using the pumice fragments, a demonstrative experiment was newly considered to teach plinian eruption. (3) Teaching materials of an flat submarine basaltic volcano erupted pillow lavas and fire fountain were shown from the Ogi Basalt, Sado Island, Japan, part of which were introduced by a TV open lecture. (4) Research techniques of the volcanic ash layers and roles of them as key beds were summarized in a lecture series as "Tephrology" (7 issues) in the journal "The Quaternary Research". (5) Volcanogenic catastrophic floods were geologically demonstrated, which provided knowledges for disaster prevention.

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  • ストラトダイナミクス: 地球表層堆積過程への力学的アプローチと探究基盤形成

    2012.4 - 2014.3

    System name:二国間交流事業・共同研究

    Awarding organization:日本学術振興会

    武藤 鉄司

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    Authorship:Coinvestigator(s)  Grant type:Competitive

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  • Extraction and quantification of the control factor, without sea level change, of the development process of the Alluvial plain

    Grant number:21540469

    2009 - 2011

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    URABE Atsushi, KATAOKA Kyoko

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    Authorship:Coinvestigator(s) 

    Grant amount:\4810000 ( Direct Cost: \3700000 、 Indirect Cost:\1110000 )

    The Alluvium of the coastal plain in Japan has been considered as formed by sea-level change. However, it is predicted that formation of Alluvium has received the sediment supply by tectonic movement or volcanic activity, etc. In the Takada plain, 4 times of volcanic large-scale sediment supply events have been recognaized by this research. These sediment supply events have brought about rapid sedimentation and changes of depositional environment of the alluvial plain.

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  • Breakout floods from caldera lakes : geology, geomorphology and paleohydrology

    Grant number:20740294

    2008 - 2010

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

    Research category:Grant-in-Aid for Young Scientists (B)

    Awarding organization:Japan Society for the Promotion of Science

    KATAOKA KyokoS.

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    Authorship:Principal investigator 

    Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )

    Catastrophic outburst floods by a breach of volcanic dam or caldera rim can cause large-magnitude ones with large volume of impounded water with sediments. The extreme floods can travel long distance from the source volcano that ultimately affect onto landform and hydrology further downstream areas and threaten human life and economy eventually. This research focused on geomorphic and sedimentary features in the Oirase River catchment area and Towada caldera lake, and the Shira River catchment area and Aso caldera. Those imply volcanogenic catastrophic floods by dambreak of caldera lakes after ignimbrite eruptions.

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  • 火山湖から発生する破局的決壊洪水流の発生・流下・堆積メカニズムと河川回復過程

    2007.6 - 2008.5

    System name:日本学術振興会H19年度特定国派遣研究者(ニュージーランド)

    Awarding organization:日本学術振興会

    片岡香子

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    Authorship:Principal investigator  Grant type:Competitive

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  • Hazards from volcanic lake break-out

    2006.4 - 2007.3

    System name:The Royal Society of New Zealand, International Science & Technology Linkages Fund

    Awarding organization:ニュージーランド王立協会

    Vern Manville

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    Authorship:Coinvestigator(s)  Grant type:Competitive

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  • Hazards from Volcanogenic floods

    2005.4 - 2006.3

    System name:The Royal Society of New Zealand, International Science & Technology Linkages Fund

    Awarding organization:ニュージーランド王立協会

    Vern Manville

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    Authorship:Coinvestigator(s)  Grant type:Competitive

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  • 破局的火山性洪水流(ラハール)の発生過程・運搬堆積作用と火山災害評価

    Grant number:17740333

    2005 - 2007

    System name:科学研究費助成事業 若手研究(B)

    Research category:若手研究(B)

    Awarding organization:日本学術振興会

    片岡 香子

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    Authorship:Principal investigator 

    Grant amount:\3400000 ( Direct Cost: \3400000 )

    本研究では福島県沼沢火山の5000年前に起きた火砕流噴火後(沼沢湖噴火)に発生したラハール(火山泥流・土石流・洪水流)を研究対象とし、噴火後に起こる突発的かつ破局的なラハールの発生過程およぴ性質(流量・物質運搬量・時間空間的変化)を暴くこと、水流作用による火砕物質の大量輪送がどのくらいの範囲に及び、どのくらいの時間、周辺環境に影響を及ぼすのかを明らかにすること、を目的とした。前年度までに、沼沢湖噴火にともなう火砕流堆積物によるせき止め湖の形成と、そこから発生した大規模な決壊洪水についてその発生に至る過程と洪水流量が明らかとなった。本年度は沼沢火山から最も遠方となる新潟平野縁辺から中心におけるラハール堆積物に調査の焦点を当て、既存のデータと照合しながらより詳細な堆積物の分布が明らかとなった。沼沢火山より風下側にあり、かつ100km以上下流に位置する新潟平野域においても、沼沢湖噴火起源のーラハール堆積物が3-5m堆積し、堆積盆縁辺部では当時段丘面に立地していたと考えられる遺跡の埋没が起こり、堆積盆中心部では当時め静穏な堆積環境が一時的に活動的網状河川システムに変化したことが明らかとなった。またこの地域は初生的な降下火山灰の影響をほとんど受けていないが、決壊洪水を含めたラハールによる影響を多大に受けたことが地層から判断できる。このことは初生(噴火)堆積物の分布のみで火山災害をとらえると、その後に発生しうるラハール災害を見落とす危険性があることを顕著に示している。また、本研究では沼沢湖噴火後のラハール堆積物の詳細な分布が明らかとなり、活火山にも指定されている沼沢火山のハザードマップ作成において重要な基礎的情報を提供する。これらの成果は国内の学会や国際学会で発表し、国内および国際雑誌に論文を投稿した。

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  • Transition of the sedimentation system of the alluvium and formation of the plain by the large-scale event sedimentation

    Grant number:17540433

    2005 - 2006

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    URABE Atsushi, TAKAHAMA Nobuyuki, KATAOKA Kyoko, HONGO Misao

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    Authorship:Coinvestigator(s) 

    Grant amount:\3500000 ( Direct Cost: \3500000 )

    Initial barrier was generally formed the alluvium in the Niigata plain about 8000 ago. It has been proven that the delta system advances in the Agano River watershed. In Numazawa volcano in the Tadami River middle class area in Fukushima Prefecture, there was the pyroclastic flow eruption about 4700 ago. The pyroclastic flow temporarily stopped Tadami River. The large-scale floodflow by a collapse of the dam over about 100km flowed Tadami River and Agano River. The enormous pyroclast which this flood brought about in the plain rapidly advanced of the Agano River watershed of the plain of the delta system. The whole barrier column advanced by this.

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Other research activities

  • Journal Reviewer

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    Bulletin of Volcanology;
    Earth Surface Processes and Landforms;
    Geological Society of America Bulletin;
    Geomorphology;
    International Journal of Earth Sciences (Geologische Rundschau);
    IAS (International Association of Sedimentologists) Special Publication;
    Island Arc;
    Journal of Mountain Science;
    Journal of South American Earth Sciences;
    Journal of Volcanology and Geothermal Research;
    Latin American Journal of Sedimentology and Basin Analysis;
    Marine Geology;
    New Zealand Journal of Geology and Geophysics;
    Palaeogeography, Palaeoclimatology, Paleoecology;
    Quaternary International;
    Quaternary Research;
    Scientific Reports;
    Sedimentary Geology;
    Sedimentology
    --
    Bulletin of Volcanological Society of Japan (Volcanological Society of Japan);
    Earth Science (The Association for the Geological Collaboration in Japan) ;
    Journal of Geological Society of Japan (Geological Society of Japan) ;
    Journal of Natural Disaster Science (Japan Society for Natural Disaster Science);
    Journal of Sedimentological Society of Japan (Sedimentological Society of Japan);
    The Quaternary Research (Japan Association for Quaternary Research)

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Teaching Experience (researchmap)

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Teaching Experience

  • 課題研究(地質科学)

    2020
    Institution name:新潟大学

  • 論文講読演習

    2020
    Institution name:新潟大学

  • 環境地質学入門

    2019
    Institution name:新潟大学

  • 野外実習A

    2019
    Institution name:新潟大学

  • 地質調査法実習III

    2019
    Institution name:新潟大学

  • 地質学入門a

    2017
    Institution name:新潟大学

  • 野外実習II

    2017
    Institution name:新潟大学

  • 環境科学特定研究Ⅰ

    2015
    Institution name:新潟大学

  • 野外実習III

    2012
    -
    2018
    Institution name:新潟大学

  • 課題研究(地質科学科)

    2012
    -
    2016
    Institution name:新潟大学

  • セミナー

    2011
    Institution name:新潟大学

  • 課題研究

    2011
    Institution name:新潟大学

  • 地盤変動特論Ⅰ

    2011
    Institution name:新潟大学

  • 第四紀・地盤災害特論Ⅰ

    2011
    Institution name:新潟大学

  • 地学C(マグマと火山)

    2010
    Institution name:新潟大学

  • 火山災害特論

    2008
    Institution name:新潟大学

  • 火山土砂災害特論

    2008
    Institution name:新潟大学

  • 地質調査法II

    2005
    Institution name:新潟大学

  • 地質調査法I

    2005
    Institution name:新潟大学

  • 地質調査法実習II

    2005
    Institution name:新潟大学

  • 地質調査法実習I

    2005
    Institution name:新潟大学

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