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2007 Fiscal Year Final Research Report Summary

Establishment of scaling law concerning the intra-conduit mechanics using pumice

Research Project

Project/Area Number 17340131
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Solid earth and planetary physics
Research InstitutionKyushu University

Principal Investigator

TORAMARU Atsushi  Kyushu University, Faculty of sciences, Professor (50202205)

Project Period (FY) 2005 – 2007
Keywordsvesiculation / crystallization / bubble / microlite / decompression rate meter / water exsolution rate meter
Research Abstract

Developing bubble number density (BND) decompression rate meter and microlite number density (MND) water exsolution rate meter, we have established the method to quantitatively estimate the decompression rate or water exsolution rate from measured values of BND or MND for given the magma temperature, compositions, and initial water content.
Applications of this method to nature have revealed the following things. For explosive eruptions, 1) the decompression rates at bubble nucleation for plinian eruptions are up to 10^6 to 10^8 Pa/s, which must be accompanied by the rapid decompression like due to a rarefaction shock wave. 2) In subplinian eruptions of basaltic andesitic magmas, the water exsolution at the microlite nucleation proceeds the diffusion limited bubble growth during the disequilibrium vesiculation. BND or crystallinity has correlations with the temporal variation of eruptions such as changes of exit velocities. 3)The fact that pyroclasts erupted at the same time have the variation in estimated rates of water exsolution suggests that the flow in the conduit is turbulent For non-explosive eruptions, 4) estimated water exsolution rate is approximately 10^<-5> wt%/s, and 0.01 to 0.1 m/s of ascent velocity and 10^2-10^3 Pa/s of decompression rate. 5)The water exsolution rates are uniform across the conduit 6) The water exsolution might proceeds at deeper level of the conduit though it is still unclear whether the vesiculation is equilibrium or disequilibrium. These facts suggests that the flow in the conduit for non-explosive eruptions is like a plug flow.
Carrying out a combined simulation of vesiculation and crystallization, and making a comparison with the laboratory experiments by Couch, et. al. (2003), we have found that MND is controlled by the amount of decompression through the driving force of diffusive bubble growths under disequilibrium vesiculation.

  • Research Products

    (47 results)

All 2008 2007 2006 2005 Other

All Journal Article (10 results) (of which Peer Reviewed: 5 results) Presentation (37 results)

  • [Journal Article] Crystallization of microlites and degassing during magma ascent : Constraints on the fluid mechanical behavior of magma during the Tenjo Eruption on Kozu Island2008

    • Author(s)
      S., Noguchi, A., Toramaru, T., Shimano
    • Journal Title

      Bull. Vol. 68

      Pages: 432-449

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Groundmass crystallization in dacite dykes taken in Unzen Scientific Drilling Project2008

    • Author(s)
      S., Noguchi, A., Toramarua, S., Nakada
    • Journal Title

      J. Volcano. Geotherm.Res. (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Relation between microlite textures and discharge rate during the 1991-1995 eruptions at Unzen, Japan2008

    • Author(s)
      Noguchi, A., Toramarua, S., Nakada
    • Journal Title

      J. Volcano. Geotherm.Res. (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] MND (microlite number density) water exsolution rate meter2008

    • Author(s)
      A., Toramaru, S., Noguchi, S., Oyoshihara, A., Tsune
    • Journal Title

      J. Volcano. Geotherm. Res. (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Crystallization of microlites and degassing during magma ascent:Constraints on the fluid mechanical behavior of magma during the Tenjo Eruption on Kozu Island,Japan2006

    • Author(s)
      Noguchi, S., Toramaru, A., and Shimano, T.
    • Journal Title

      Bulletin of Volcanology 68

      Pages: 432-449

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] BND(bubble number density)decompression rate meter for explosive volcanic eruptions2006

    • Author(s)
      Toramaru, A.
    • Journal Title

      Journal of Volcanology and Geothermal Research 154

      Pages: 303-316

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] BND (bubble number density) decompression rate meter for explosive volcanic eruptions2006

    • Author(s)
      A., Toramaru
    • Journal Title

      J. Volcano. Geotherm. 154

      Pages: 303-316

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] MND(microhte number density)water exsolution rate meter

    • Author(s)
      Toramaru, A., S.Noguchi, S.Oyoshihara, A.Tsune
    • Journal Title

      Journal of Volcanology and Geothermal Research (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Relation between microlite textures and discharge rate during the 1991-1995 eruptions at Unzen,Japan

    • Author(s)
      Noguchi, S., A.Toramarua, S.Nakada
    • Journal Title

      Journal of Volcanology and Geothermal Research (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Groundmass crystaIhzation in dacite dykes taken in Unzen Scientific Drilling Project

    • Author(s)
      Noguchi, S., A.Toramarua, S.Nakada
    • Journal Title

      Journal of Volcanology and Geothermal Research (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Presentation] 次期5カ年における火山噴火素過程研究2008

    • Author(s)
      寅丸 敦志
    • Organizer
      地震・火山噴火予知研究計画シンポジウム
    • Place of Presentation
      東京
    • Year and Date
      20080300
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 火山噴出物分析による火道内マグマ挙動の解明2008

    • Author(s)
      寅丸 敦志
    • Organizer
      次期火山噴火予知研究計画検討会
    • Place of Presentation
      東京
    • Year and Date
      20080200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Groundmass crystallization in the Dacite Dikes of Unzen Scientific Drilling Project 4(USDP-4)2007

    • Author(s)
      Noguchi, S., Toramaru, A., Nakada
    • Organizer
      Cites on Volcanoes 5
    • Place of Presentation
      Shimabara,Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Difficulty in the Numerical Analysis of Magma Convection by SIMPLER Algorithm2007

    • Author(s)
      Matsumoto, M., Toramaru, A.
    • Organizer
      Cites on Volcanoes 5
    • Place of Presentation
      Shimabara,Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Vesiculation and Crystallization under Constant Amout of Decompression:Numerical Study and its comparison with Laboratory Experiments2007

    • Author(s)
      Toramaru, A., Miwa, T.
    • Organizer
      Cites on Volcanoes 5
    • Place of Presentation
      Shimabara,Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Material scientific study on vulcanian eruptions of Sakurajima volcano,Japan2007

    • Author(s)
      Miwa, T., Toramaru, A., lguch, M.
    • Organizer
      Cites on Volcanoes 5
    • Place of Presentation
      Shimabara,Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 深部熱源とその流体放出を考慮した地熱系進化の予備的数理モデル2007

    • Author(s)
      松本 光央, 寅丸 敦志
    • Organizer
      日本地熱学会平成19年つくば大会
    • Place of Presentation
      つくば市
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Groundmass crystallization in the Dacite Dikes of Unzen Scientific Drilling2007

    • Author(s)
      S., Noguchi, A., Toramaru, S., Nakada
    • Organizer
      COV5, 11-P-18
    • Place of Presentation
      Shimabara, Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Difficulty in the Numerical Analysis of Magma Convection by SIMPLER Algorithm2007

    • Author(s)
      M., Matsumoto, A., Toramaru
    • Organizer
      COV5, 11-P-18
    • Place of Presentation
      Shimabara, Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Vesiculation and Crystallization under Constant Amout of Decompression : Numerical Study and its comparison with Laboratory Experiments2007

    • Author(s)
      A., Toramaru, T., Miwa
    • Organizer
      COV5, 11-P-18
    • Place of Presentation
      Shimabara, Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Material scientific study on vulcanian eruptions of Sakurajima volcano, Japan2007

    • Author(s)
      T., Miwa, A., Toramaru, M., Iguch
    • Organizer
      COV5, 11-P-18
    • Place of Presentation
      Shimabara, Japan
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 圧するマグマにおける膨張する気泡の暴走合体2007

    • Author(s)
      寅丸 敦志
    • Organizer
      日本火山学会秋季大会
    • Place of Presentation
      島原市
    • Year and Date
      20071000
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 長崎県平戸島における縞構造の発達した岩脈について〜石基組織の解析および縞構造形成モデルの提案2007

    • Author(s)
      吉田 牧子・寅丸 敦志
    • Organizer
      日本火山学会秋季大会
    • Place of Presentation
      島原市
    • Year and Date
      20071000
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] マグマの発泡によって励起される低周波地震2007

    • Author(s)
      寅丸 敦志
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20070500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 桜島ブルカノ式噴火に関する物質科学的検討2007

    • Author(s)
      三輪 学央・寅丸 敦志・井口 正人
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20070500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] マイクロライト・システマティックス2007

    • Author(s)
      寅丸 敦志・田村 聖・大葭原 しのぶ・三輪 学央
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20070500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Relation between microlite textures and discharge rate during the 1991-1995 eruptions at Unzen,Japan2006

    • Author(s)
      S.Noguchi, A.Toramaru, S.Nakada
    • Organizer
      American Geophysical Union, Fall Meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] MND(microlite number density)water exsolution rate meter2006

    • Author(s)
      A.Toramaru, S.Noguchi, S.Oyoshihara, A.Tsune.
    • Organizer
      American Geophysical Union, Fall Meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] BND(bubblenumberdensity)decompression rate meter for explosive volcanic eruptions2006

    • Author(s)
      A.Toramaru
    • Organizer
      American Geophysical Union, Fall Meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Relation between microlite textures and discharge rate during the 1991-1995 eruptions at Unzen, Japan2006

    • Author(s)
      S., Noguchi, A., Toramaru, S., Nakada
    • Organizer
      American Geophysical Union, Fall Meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] MND(microlite number density) water exsolution rate meter2006

    • Author(s)
      A., Toramaru, S., Noguchi, S., Oyoshihara, A., Tsune
    • Organizer
      American Geophysical Union, Fall Meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      20061200
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 桜島ブルカノ式噴火火山灰の岩石組織と空振強度の関係2006

    • Author(s)
      三輪 学央・寅丸 敦志
    • Organizer
      日本火山学会秋季大会
    • Place of Presentation
      熊本県阿蘇
    • Year and Date
      20061000
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 長崎県平戸島の岩脈に見られる縞構造について〜縞構造を形成する気泡・斑晶・石基の組織解析2006

    • Author(s)
      吉田 牧子・寅丸 敦志
    • Organizer
      日本火山学会秋季大会
    • Place of Presentation
      熊本県阿蘇
    • Year and Date
      20061000
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] マグマの冷却に伴う結晶の振動核形成についての数値モデル,その2:共融点振動2006

    • Author(s)
      寅丸 敦志
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20060500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 白浜層群ソレアイト系列火山岩類の斜長石累帯構造から読み取る不均質マグマ溜まり2006

    • Author(s)
      津根 明、寅丸 敦志
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20060500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 桜島ブルカノ式噴火火山灰中に見られる2006

    • Author(s)
      三輪 学央、寅丸 敦志
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20060500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 長崎県平戸島の岩脈に見られる縞構造について2006

    • Author(s)
      吉田 牧子、寅丸 敦志
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20060500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 雲仙1991-1995年噴火噴出物のマイクロライト組織と噴出率の関係2006

    • Author(s)
      野口 聡、寅丸 敦志、中田 節也
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20060500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 雲仙火道掘削コアの浸透率測定2006

    • Author(s)
      清水 悠太、渡辺 了、野口 聡、寅丸 敦志、中田 節也
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20060500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Dynamics of thet nonexplosive eruption based on the textural analysis during the 1991-1995 eruptions at Unzen,Japan:Relations among microlite texutre,discharge rate,and degassing process2005

    • Author(s)
      Noguchi, S., Toramaru, A., Nakada, S.
    • Organizer
      JSPS2国間共同研究(日露共同研究)国際シンポジウム
    • Place of Presentation
      モスクワ大
    • Year and Date
      20051200
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Dynamics of thet non-explosive eruption based on the textural analysis during the 1991-1995 eruptions at Unzen, Japan : Relations among microlite texutre, discharge rate, and degassing process2005

    • Author(s)
      S., Noguchi, A., Toramaru, S., Nakada
    • Organizer
      JSPS 2 Russia-Japan cooperation research international symposium
    • Place of Presentation
      Moscow
    • Year and Date
      20051200
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 雲仙平成火道試料におけるマグマの脱ガス・結晶化過程2005

    • Author(s)
      野口 聡, 寅丸 敦志, 中田 節也
    • Organizer
      火山学会
    • Place of Presentation
      札幌市
    • Year and Date
      20051000
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 斜長石波状累帯構造形成のモデリングと数値計算研究:結晶表面状態と成長速度の関係の定式化2005

    • Author(s)
      津根 明, 寅丸 敦志
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20050500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 雲仙1991-1995年噴火噴出物の結晶組織と噴出率の関係2005

    • Author(s)
      野口 聡, 寅丸 敦志, 中田 節也
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20050500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 火道掘削試料の石基組織解析2005

    • Author(s)
      野口 聡, 寅丸 敦志, 中田 節也
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20050500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 桜島大正噴火軽石の気泡組織2005

    • Author(s)
      三輪 学央, 寅丸 敦志
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20050500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 雲仙火山火道掘削コアの記載と解釈2005

    • Author(s)
      後藤 芳彦, 中田 節也, 吉本 充宏, 嶋野 岳人, 黒川 将, 杉本 健, 野口 聡, 寅丸 敦志, 星住 英夫, 小栗 和清, 宇都 浩三
    • Organizer
      地球惑星科学関連学会合同大会
    • Place of Presentation
      千葉幕張
    • Year and Date
      20050500
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2010-02-04  

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