大規模カルデラ形成噴火と活動的後カルデラ火山:─北海道南西部,洞爺カルデラと有珠火山の地質概説および露頭紹介─  [in Japanese] Large-scale Caldera-forming Eruption and Active Post-caldera Volcano: General Geology and Representative Outcrops of Toya Caldera and Usu Volcano, Southwestern Hokkaido, Japan  [in Japanese]

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Author(s)

    • 松本 亜希子 MATSUMOTO Akiko
    • 北海道大学大学院理学院自然史科学専攻 Department of Natural History Sciences, Graduate School of Science, Hokkaido University
    • 東宮 昭彦 TOMIYA Akihiko
    • 産業技術総合研究所地質調査総合センター Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology
    • 中川 光弘 NAKAGAWA Mitsuhiro
    • 北海道大学大学院理学院自然史科学専攻 Department of Natural History Sciences, Graduate School of Science, Hokkaido University

Abstract

<p> Toya caldera, eastern Hokkaido, was formed approximately 110 ka, and has two post-caldera volcanoes, Nakajima and Usu volcano. Caldera-forming eruptions ejected a large-scale Toya pyroclastic flow, and related co-ignimbrite ash which covered a wide area in northern Japan. Usu volcano is one of the most active volcanoes in Japan, and has had repeated magmatic eruptions during historical time since AD 1663. The latest major eruption occurred in AD 2000. General geology and representative outcrops of eruptive deposits from Toya caldera and its post-caldera volcanoes are introduced, on the basis of a training field course at the 6<sup>th</sup> IAVCEI Collapse Caldera Workshop held in September 2016.</p>

Journal

  • Journal of Geography (Chigaku Zasshi)

    Journal of Geography (Chigaku Zasshi) 127(2), 289-301, 2018

    Tokyo Geographical Society

Codes

  • NII Article ID (NAID)
    130007395838
  • NII NACSIS-CAT ID (NCID)
    AN00322536
  • Text Lang
    JPN
  • ISSN
    0022-135X
  • NDL Article ID
    029017828
  • NDL Call No.
    Z15-169
  • Data Source
    NDL  J-STAGE 
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