Fluid flow and mineral precipitation within fractures under crustalenvironments

2009 Fiscal Year Final Research Report

• Project/Area Number: 20740304
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Tohoku University
• Principal Investigator: OKAMOTO Atsushi Tohoku University, 大学院・環境科学研究科, 助教 (40422092)
• Project Period (FY): 2008 – 2009
• Keywords: 水熱反応実験 / 石英

Research Abstract

Fractures play as dominant fluid pathways in the Earth's crust. Mineral veins, that are fractures sealed by minerals (i.e. quartz and calcite) show a variety of microtextures. In this study, we conducted hydrothermal experiments to precipitation of silica minerals under crustal conditions. We clarified that mechanisms and textural developments in precipitation of silica minerals systematically vary depending on Si concentration, minor elements in solutions and rock substrates.

Research Products

• [Journal Article] Mineralogical and Textural variation of silica minerals in hydrothermal flow-through experiments: Implications for quartz vein formation. (2010)
  • Author(s): Okamoto A, Saishu H, Hirano N, Tsuchiya N
  • Journal Title: Geochimica et Cosmochimica Acta (印刷中)
  • Peer Reviewed
• [Journal Article] The occurrence and structure of vermiform chlorite. (2010)
  • Author(s): Kameda J, Okamoto A, Mikouchi T, Kitagawa R, Kogure T
  • Journal Title: Clay Science (印刷中)
  • Peer Reviewed
• [Journal Article] 岩石内に隔離された流体中の有機物および微生物の非汚染検出に関する実験的検討. (2010)
  • Author(s): 中島康隆・平野伸夫・須藤孝一・岡本敦・井上千弘・土屋範芳
  • Journal Title: 地熱学会誌 32 Pages: 41-48
  • Peer Reviewed
• [Journal Article] Determination of amphibole fracture strength for quantitative paleostress analysis using microboudinage structures. (2010)
  • Author(s): Kimura, N., Nakayama S., Tsukishima, K., Miwa, S., Okamoto, A., Masuda, T.
  • Journal Title: Journal of Structural Geology 32 Pages: 136-150
  • Peer Reviewed
• [Journal Article] Velocity of vertical fluid ascent within vein-forming fractures. (2009)
  • Author(s): Okamoto A, Tsuchiya N
  • Journal Title: Geology 37 Pages: 563-566
  • Peer Reviewed
• [Journal Article] Mineral distribution within polymineralic veins in the Sanbagawa belt, Japan: implications for mass transfer during vein formation. (2008)
  • Author(s): Okamoto, A., Kikuchi, T., Tsuchiya, N.
  • Journal Title: Contributions to Mineralogy and Petrology 156 Pages: 323-336
  • Peer Reviewed
• [Journal Article] Variations in stable isotope compositions (δ13C, δ18O) of calcite within exhumation-related veins from the Sanbagawa metamorphic belt. (2008)
  • Author(s): Morohashi, K., Okamoto, A., Satish-Kumar, M., Tsuchiya, N.
  • Journal Title: Journal of Mineralogical and Petrological Sciences 103 Pages: 361-364
  • Peer Reviewed
• [Journal Article] Magnitude ofσ1, σ2, andσ3 at mid-crustal levels in an orogenic belt: microboudin method applied to an impure metachert from Turkey. (2008)
  • Author(s): Masuda, T., Nakayama, S., Kimura, N., Okamoto A.
  • Journal Title: Tectonophysics 460 Pages: 230-236
  • Peer Reviewed
• [Journal Article] Precipitation of silica minerals by hydrothermal flow-through experiments at 200-430 ℃ and 30 MPa. (2008)
  • Author(s): Okamoto, A., Saishu, H., Hirano, N., Watanabe, N., Tsuchiya, N.
  • Journal Title: Transactions of Geothermal Resource Council 32 Pages: 389-392
  • Peer Reviewed
• [Presentation] 水熱反応によるシリカ析出様式と組織発達 (2009)
  • Author(s): 岡本敦、最首花恵、平野伸夫、土屋範芳
  • Organizer: 日本地質学会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2009-09-05
• [Presentation] 西アルプスの紅簾石片岩のマイクロブーディン構造を用いた応力-歪解析 (2009)
  • Author(s): 大森康智、木村希生、岡本敦、増田俊明
  • Organizer: 日本地質学会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2009-09-05
• [Presentation] 地殻流体からのシリカ鉱物析出速度 (2009)
  • Author(s): 最首花恵、岡本敦、平野伸夫、土屋範芳
  • Organizer: 日本地質学会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2009-09-05
• [Presentation] 圧痕形成に於ける平行四辺形の法則の提唱 (2009)
  • Author(s): 増田俊明、櫻井涼子、三宅智也、山之内未来、大森康智、針金由美子、岡本敦
  • Organizer: 日本地質学会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2009-09-05
• [Presentation] Preliminary studies of the Tseel metamorphic rocks in southwestern Mongolia (2009)
  • Author(s): Burenjargal U, Okamoto A, Tsuchiya N
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2009-05-16
• [Presentation] 三波川帯上昇期に形成した鉱物脈の空間分布 (2009)
  • Author(s): 岡本敦、諸橋啓介、サティシュクマール、土屋範芳
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2009-05-16
• [Presentation] Precipitation of silica minerals by hydrothermal flow-through experiments at 200-430 °C and 30 MPa. (2008)
  • Author(s): Okamoto, A., Shaishu, H., Hirano, N., Watanabe, N., Tsuchiya, N.
  • Organizer: Geothermal Resource Council
  • Place of Presentation: Reno, Nevada
  • Year and Date: 2008-10-07
• [Presentation] 流通式反応実験によるシリカ析出様式と組織発達. (2008)
  • Author(s): 岡本敦、平野伸夫、土屋範芳
  • Organizer: 日本鉱物科学会
  • Place of Presentation: 秋田
  • Year and Date: 2008-09-22
• [Presentation] 三波川変成帯の方解石を含む鉱物脈の同位体組成からみた流体移動 (2008)
  • Author(s): 諸橋啓介, 岡本敦, Madhusoodhan Satish-Kumar, 土屋範芳
  • Organizer: 日本地質学会
  • Place of Presentation: 秋田
  • Year and Date: 2008-09-22
• [Presentation] バーミキュラー状緑泥石の産状と構造. (2008)
  • Author(s): 亀田純、岡本敦、北川隆司、小暮敏博
  • Organizer: 粘土科学討論会
  • Place of Presentation: 沖縄
  • Year and Date: 2008-09-04
• [Presentation] Kinetics and textural development of quartz vein. (2008)
  • Author(s): Okamoto A, Tsuchiya N.
  • Organizer: Goldschimdt Conference
  • Place of Presentation: Vancouver
  • Year and Date: 2008-07-15
• [Presentation] Effect of lithology on calcite-vein formation in the Sanbagawa metamorphic rocks. (2008)
  • Author(s): 諸橋啓介, 岡本敦, Madhusoodhan Satish-Kumar, 土屋範芳
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張
  • Year and Date: 2008-05-22
• [Presentation] 石英ベイン形成のカイネティクスと組織発達. (2008)
  • Author(s): 岡本敦, 平野伸夫, 渡邉則昭, 土屋範芳
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張
  • Year and Date: 2008-05-22