Mechanism of dike growth within a mechanically-heterogeneous host rock

• Project/Area Number: 21710182
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Natural disaster science
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: GESHI Nobuo 独立行政法人産業技術総合研究所, 地質情報研究部門, 主任研究員 (70356955)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 火山 / 噴火 / マグマ / 噴火推移予測 / 地質学 / 自然災害 / ダイク / 三宅島 / 噴火予測

Research Abstract

The shapes of dikes intruding the layered host rock of Miyakejima and Reunion Island are examined by the field observations. Structural difference between feeder and non-feeder dikes are revealed. Numerical FEM simulations indicate that the variation of dike thickness observed in Miyakejima and Piton de la Fournaise can be broadly explained in terms of layer-stiffness differences of one or two orders of magnitude. Based on the results, the effects of the dike propagation process controlled by the host rock structure on the location and process of fissure eruptions are evaluated.

Research Products

• [Journal Article] From structure-to erosion-controlled subsiding calderas : evidence thresholds and mechanics (2012)
  • Author(s): Geshi N.、Acocella V.、Ruch J.
  • Journal Title: Bulletin of Volcanology. Volume: (印刷中) Issue: 6 Pages: 1553-1567
  • DOI: 10.1007/s00445-012-0617-x
  • Peer Reviewed
• [Journal Article] Effects of mechanical layering of host rocks on dike growth and arrest (2012)
  • Author(s): Geshi N.、Kusumoto S.、Gudmundsson A.
  • Journal Title: Journal of Volcanology and Geothermal Research Volume: 223-224 Pages: 74-82
  • DOI: 10.1016/j.jvolgeores.2012.02.004
  • Peer Reviewed
• [Journal Article] Growth of phreatomagmatic explosion craters : a model inferred from Suoana crater in Miyakejma Volcano、Japan (2011)
  • Author(s): Geshi N.、Nemeth K.、Oikawa T.
  • Journal Title: Journal of Volcanology and Geothermal Research Volume: 201 Issue: 1-4 Pages: 30-38
  • DOI: 10.1016/j.jvolgeores.2010.11.012
  • Peer Reviewed
• [Journal Article] Growth of phreatomagmatic explosion craters : A model inferred from Suoana crater in Miyakejima Volcano, Japan (2011)
  • Author(s): Geshi N., Nemeth K, Oikawa T
  • Journal Title: Journal of Volcanology and Geothermal Research Volume: 201 Pages: 30-39
  • Peer Reviewed
• [Journal Article] Geometric difference between non-feeder and feeder dikes (2010)
  • Author(s): Geshi N.、Kusumoto S.、Gudmundsson A.
  • Journal Title: Geology Volume: 38 Issue: 3 Pages: 195-198
  • DOI: 10.1130/g30350.1
  • Peer Reviewed
• [Journal Article] The geometric difference between non-feeders and feeder dikes. (2010)
  • Author(s): Geshi N, Kusumoto S, Gudmundsson A
  • Journal Title: Geology 38 Pages: 195-198
  • Peer Reviewed
• [Presentation] Relationships between caldera size and eruptive volume of magma (2011)
  • Author(s): Nobuo Geshi, Joel Ruch, Valerio Acocella
  • Organizer: European Geosciences Union General Assembly 2011
  • Place of Presentation: Austria Center Vienna,ウィーン市,オーストリア
  • Year and Date: 2011-04-07
• [Presentation] Caldera wall stability : evolution process of funnel caldera (2010)
  • Author(s): Geshi N, Acocella, V., Ruch J
  • Organizer: Collapse caldera workshop 2010, La Reunion
  • Place of Presentation: Reunion大学(France)
  • Year and Date: 2010-10-04
• [Presentation] 母岩物性の不均質を反映した岩脈の発達過程 (2010)
  • Author(s): 下司信夫, 楠本成寿, A.ガドマドソン
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 2010-05-25
• [Presentation] 母岩物性の不均質を反映したダイクの発達過程 (2010)
  • Author(s): 下司信夫、楠本成寿、A.ガドマドソン
  • Organizer: 日本地球惑星科学連合2010年大会幕張メッセ国際会議場
  • Place of Presentation: 千葉県千葉市
  • Year and Date: 2010-05-23
• [Presentation] Dike thickness controlled by the layering of the host rock (2010)
  • Author(s): Nobuo Geshi、Shigekazu Kusumoto、Agust Gudmundsson、Agust Gudmundsson
  • Organizer: European Geosciences Union General Assembly 2010
  • Place of Presentation: Austria Center Vienna
  • Year and Date: 2010-05-05
• [Presentation] Dike thickness controlled by the layering of the host rock (2010)
  • Author(s): Geshi N, Kusumoto S, Gudmundsson, A
  • Organizer: European Geosciences Union 2010 General Assembly
  • Place of Presentation: Austria International Center, Vienna, (Austria)
  • Year and Date: 2010-05-05
• [Presentation] Vertical structural variation of the dikes exposed in the Miyakejima 2000 caldera (2009)
  • Author(s): N Geshi, A Gudmundsson, S Kusumoto
  • Organizer: European Geosciences Union, General Assembly 2009
  • Place of Presentation: Austria Center Vienna, Wien, Austria
  • Year and Date: 2009-04-22