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An experimental approach to understand the degassing mechanism in volcanoes

Research Project

Project/Area Number 19740281
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Solid earth and planetary physics
Research InstitutionKanazawa University

Principal Investigator

NAMIKI Atsuko  Kanazawa University, フロンティアサイエンス機構, 研究員 (20450653)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,540,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywords火山現象 / 脱ガス / 噴火様式 / せん断 / 気泡 / マグマ / 火山
Research Abstract

マグマ中の気泡に含まれる火山ガスは何らかのメカニズムにより噴火を伴わなくても大気中に開放(=脱ガス)されていると考えられる。このメカニズムを理解する為に気泡を含む高粘性流体にせん断変形を加える実験を行った。その結果、ある条件に於いてせん断が気泡を変形させ、脱ガスが起きる様子を観察する事に成功した。この条件を更に定量化する事で実際の火山における脱ガスが起こる条件を特定できると考えている。

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (11 results)

All 2008 2007

All Journal Article (5 results) (of which Peer Reviewed: 2 results) Presentation (6 results)

  • [Journal Article] Transition between fragmentation and permeable outgassing of low viscosity magmas2008

    • Author(s)
      A., Namiki, M., Manga
    • Journal Title

      J. Volcanol. Geotherm. Res. Vol. 169

      Pages: 48-60

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Transition between fragmentation and permeable outgassing of low viscosity magmas2008

    • Author(s)
      A., Namiki, M., Manga
    • Journal Title

      J. Volcanol. Geotherm. Res. 169

      Pages: 48-60

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 風船を使ってカルデラをつくろう2008

    • Author(s)
      並木敦子
    • Journal Title

      理科教室 3月号

      Pages: 52-55

    • Related Report
      2007 Annual Research Report
  • [Journal Article] つくば市の学校教員との火山実験2008

    • Author(s)
      高田 亮・竹内 晋吾・並木 敦子
    • Journal Title

      地質ニュース 3月号

      Pages: 12-14

    • Related Report
      2007 Annual Research Report
  • [Journal Article] 産総研一般公開及び地質情報展への「風船でカルデラ地形を作ってみよう」出展報告2007

    • Author(s)
      並木敦子
    • Journal Title

      GSJニュースレター 37

      Pages: 3-4

    • Related Report
      2007 Annual Research Report
  • [Presentation] 高粘性流体中の気泡の振動・破裂で発生する空振の実験的研究2008

    • Author(s)
      小林宰、隅田育郎、並木敦子
    • Organizer
      日本火山学会2008年度秋季大会
    • Place of Presentation
      岩手大学工学部
    • Year and Date
      2008-10-11
    • Related Report
      2008 Annual Research Report
  • [Presentation] Transition between fragmentation and permeable outgassing of low viscosity magmas2008

    • Author(s)
      A., Namiki & M., Manga
    • Organizer
      IAVCEI 2008 General assembly
    • Place of Presentation
      Reykjavik, Iceland
    • Year and Date
      2008-08-22
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] Transition between fragmentation and permeable outgassing of low viscosity magmas2007

    • Author(s)
      A., Namiki, & M., Manga
    • Organizer
      AGU Fall meeting 2007
    • Place of Presentation
      San Francisco, CA, USA
    • Year and Date
      2007-12-11
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] Influence of decompression rate on the expansion velocity and expansion style of bubbly fluids2007

    • Author(s)
      A., Namiki,& M., Manga
    • Organizer
      IUGG 2007
    • Place of Presentation
      Perugia, Italy
    • Year and Date
      2007-07-12
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] マイケルマンガ、低粘性マグマにおける破砕と浸透脱ガスの条件2007

    • Author(s)
      並木敦子
    • Organizer
      地球惑星科学連合大会2007年大会
    • Place of Presentation
      千葉県幕張メッセ
    • Year and Date
      2007-05-24
    • Related Report
      2008 Final Research Report
  • [Presentation] 低粘性マグマにおける破砕と浸透脱ガスの条件2007

    • Author(s)
      並木敦子、マイケルマンガ
    • Organizer
      地球惑星科学連合大会2007年大会
    • Place of Presentation
      千葉県幕張メッセ
    • Year and Date
      2007-05-24
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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