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Pre-eruptive magma processes in a magma chamber that led to a catastrophic caldera-forming eruption

Research Project

Project/Area Number 16K05616
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Petrology/Mineralogy/Economic geology
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Tomiya Akihiko  国立研究開発法人産業技術総合研究所, 地質調査総合センター, 主任研究員 (30357553)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsマグマ・火成岩 / 噴火 / 火山 / マグマ溜まり / 洞爺カルデラ / 斑晶 / 流紋岩 / 軽石 / 大規模火砕流 / 噴火準備過程 / マグマ混合 / タイムスケール / 高シリカ流紋岩 / 大規模火砕流堆積物 / 岩石・鉱物・鉱床学 / 自然現象観測・予測、自然災害
Outline of Final Research Achievements

I conducted a series of petrological and petrographical studies on Toya caldera, Hokkaido, Japan, to investigate the pre-eruptive magma processes in the magma chamber that led to a catastrophic caldera-forming eruption. This study revealed that, just prior to the eruption, a large amount of homogeneous rhyolitic magma was stored at ca. 7 km in depth in the main magma chamber, which had stably existed for a long time. High-temperature magma had been repeatedly injected and mixed into the magma chamber since at least hundreds of years before the eruption, and the last magma mixing occurred just prior to or during the eruption.

Academic Significance and Societal Importance of the Research Achievements

洞爺カルデラのマグマ溜まりの深さ・温度,噴火準備過程,およびそのタイムスケール等を明らかにすることができ,カルデラ噴火のメカニズムへの理解の進展に貢献した.また,本研究結果をもとに,地球物理学的モデル化を進めていけば,将来巨大カルデラ噴火の前にどのようなことが観測され得るのかについての指針を与えることが可能と考えられ,防災上の意義も大きい.

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (29 results)

All 2020 2019 2018 2017 2016 Other

All Int'l Joint Research (5 results) Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (14 results) (of which Int'l Joint Research: 9 results,  Invited: 3 results) Book (1 results)

  • [Int'l Joint Research] オレゴン州立大学(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] バイロイト大学(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Oregon State University(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Oregon State University/University of Wisconsin-Madison(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] オレゴン州立大学(米国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Age of the Toya Eruption2020

    • Author(s)
      東宮 昭彦、宮城 磯治
    • Journal Title

      BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN

      Volume: 65 Issue: 1 Pages: 13-18

    • DOI

      10.18940/kazan.65.1_13

    • NAID

      130007825030

    • ISSN
      0453-4360, 2189-7182
    • Year and Date
      2020-03-31
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Catastrophic sector collapse at Usu volcano, Hokkaido, Japan: failure of a young edifice built on soft substratum.2019

    • Author(s)
      Goto, Y., Danhara, T. and Tomiya, A.
    • Journal Title

      Bulletin of Volcanology

      Volume: 81 Issue: 6 Pages: 37-37

    • DOI

      10.1007/s00445-019-1293-x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Internal structures and growth style of a Quaternary subaerial rhyodacite cryptodome at Ogariyama, Usu volcano, Hokkaido, Japan2019

    • Author(s)
      Goto, Y. and Tomiya
    • Journal Title

      Frontiers in Earth Science

      Volume: 7 Pages: 66-66

    • DOI

      10.3389/feart.2019.00066

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stratigraphy and Lithofacies of the Toya Ignimbrite in Southwestern Hokkaido, Japan: Insights into the Caldera-forming Eruption at Toya Caldera2018

    • Author(s)
      Goto, Y.、Suzuki, K.、Shinya, T.、Yamauchi, A.、Miyoshi, M.、Danhara, T.、Tomiya, A.
    • Journal Title

      Journal of Geography (Chigaku Zasshi)

      Volume: 127 Issue: 2 Pages: 191-227

    • DOI

      10.5026/jgeography.127.191

    • NAID

      130007395830

    • ISSN
      0022-135X, 1884-0884
    • Year and Date
      2018-04-25
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Large-scale Caldera-forming Eruption and Active Post-caldera Volcano: General Geology and Representative Outcrops of Toya Caldera and Usu Volcano, Southwestern Hokkaido, Japan2018

    • Author(s)
      長谷川 健、松本亜希子、東宮昭彦、中川光弘
    • Journal Title

      Journal of Geography (Chigaku Zasshi)

      Volume: 127 Issue: 2 Pages: 289-301

    • DOI

      10.5026/jgeography.127.289

    • NAID

      130007395838

    • ISSN
      0022-135X, 1884-0884
    • Year and Date
      2018-04-25
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magmatic evolution of lunar highland rocks estimated from trace elements in plagioclase: A new bulk silicate Moon model with sub-chondritic Ti/Ba, Sr/Ba, and Sr/Al ratios2017

    • Author(s)
      Togashi, S., Kita N.T., Tomiya A., Morishita, Y.
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: 210 Pages: 152-183

    • DOI

      10.1016/j.gca.2017.04.031

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 噴火準備過程の岩石学的解析に関する国際ワークショップ (PAPEMP)発表概要2017

    • Author(s)
      東宮昭彦
    • Journal Title

      地質調査研究報告

      Volume: 68 Pages: 177-182

    • NAID

      130005997167

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 高温高圧ガス圧装置の移設2017

    • Author(s)
      東宮昭彦
    • Journal Title

      IEVGニュースレター

      Volume: 4 Pages: 10-11

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Journal Article] マグマ溜まり:噴火準備過程と噴火開始条件2016

    • Author(s)
      東宮昭彦
    • Journal Title

      火山

      Volume: 61 Pages: 281-294

    • NAID

      130006783535

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] Petrological, Experimental, and Theoretical Studies of the Sub-Plinian Eruptions during the 2011 Shinmoedake (Kirishima Volcano, Japan) Eruption2019

    • Author(s)
      Satoshi Okumura, Tomofumi Kozono, Hans Keppler, Akihiko Tomiya, and Masashi Ushioda
    • Organizer
      27th IUGG General Assembly
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evolutional History of Toya Caldera, Hokkaido, Japan: Since 1.6 Ma to the Present2019

    • Author(s)
      Yoshihiko Goto, Tohru Danhara, Akihiko Tomiya
    • Organizer
      27th IUGG General Assembly
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Internal Structures and Growth Style of a Quaternary Subaerial Rhyodacite Cryptodome at Ogariyama, Usu Volcano, Japan: Comparison with Subaqueous Cryptodomes2019

    • Author(s)
      Yoshihiko Goto, Akihiko Tomiya
    • Organizer
      27th IUGG General Assembly
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 洞爺カルデラ噴火をもたらしたマグマシステム2019

    • Author(s)
      東宮 昭彦、後藤芳彦、檀原 徹、Shanaka L de Silva
    • Organizer
      日本地球惑星科学連合 2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Magmatic conditions prior to the 2000 eruption of Usu volcano, Japan2018

    • Author(s)
      Satoka Ohnishi, Akihiko Tomiya
    • Organizer
      JpGU2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 有珠火山2000年噴火の噴火準備過程2018

    • Author(s)
      大西里佳、東宮昭彦
    • Organizer
      日本火山学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Trigger of the Toya ignimbrite eruption, Japan: short-time mixing of multiple magma batches with high-silica rhyolite2018

    • Author(s)
      Akihiko Tomiya, Yoshihiko Goto, Tohru Danhara, Shanaka L de Silva
    • Organizer
      2018 AGU Fall Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 岩石学的にみた噴火準備過程と噴火開始条件2017

    • Author(s)
      東宮昭彦
    • Organizer
      日本火山学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Magmatic conditions and preruptive magma proceses of the catastrophic eruption of high-silica rhyolite from Toya caldera, Japan2017

    • Author(s)
      Tomiya, A.、Goto, Y.、Danhara, T.、Shanaka de Silva
    • Organizer
      IAVCEI2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] The dynamics of the 2011 Kirishima-Shinmoe-dake eruptions, Japan, revealed by tiltmeter, satelite, and weather radar observations2017

    • Author(s)
      Tomofumi Kozono, Hideki Ueda, Taku Ozawa, Toshiki Shimbori, Keiichi Fukui, Takehiro Koyaguchi, Eisuke Fujita, Akihiko Tomiya
    • Organizer
      IAVCEI2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Introduction to the International Workshop on Petrological Analysis of Pre-eruptive Magma Processes (PAPEMP)2016

    • Author(s)
      東宮 昭彦
    • Organizer
      International Workshop on Petrological Analysis of Pre-eruptive Magma Processes (PAPEMP)
    • Place of Presentation
      産業技術総合研究所(茨城県つくば市)
    • Year and Date
      2016-11-09
    • Related Report
      2016 Research-status Report
  • [Presentation] 洞爺火砕流の噴火直前マグマプロセス2016

    • Author(s)
      東宮 昭彦、後藤 芳彦、檀原 徹、Shanaka de Silva
    • Organizer
      日本火山学会2016年度秋季大会
    • Place of Presentation
      富士吉田市民会館・ふじさんホール(山梨県富士吉田市)
    • Year and Date
      2016-10-13
    • Related Report
      2016 Research-status Report
  • [Presentation] Preeruptive magma processes of the catastrophic eruption of high-silica rhyolite from Toya caldera, Japan2016

    • Author(s)
      東宮 昭彦、後藤 芳彦、檀原 徹、Shanaka de Silva
    • Organizer
      第6回国際陥没カルデラワークショップ
    • Place of Presentation
      第二名水亭(北海道伊達市)
    • Year and Date
      2016-09-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Preeruptive processes of the eruption of high-silica rhyolite from Toya caldera, Japan2016

    • Author(s)
      東宮 昭彦、後藤 芳彦、檀原 徹、Shanaka de Silva
    • Organizer
      Goldschmidt2016
    • Place of Presentation
      パシフィコ横浜(横浜市)
    • Year and Date
      2016-06-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 地球・惑星・生命2020

    • Author(s)
      日本地球惑星科学連合(共編著)
    • Total Pages
      280
    • Publisher
      東京大学出版会
    • ISBN
      9784130637152
    • Related Report
      2019 Annual Research Report

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Published: 2016-04-21   Modified: 2022-02-21  

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