Preliminary verification study on textural and magnetic development of serpentinites for intermittent diapirs in southwestern Japan

• Project/Area Number: 20540451
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geology
• Research Institution: Okayama University
• Principal Investigator: YOSHINO Haruka 岡山大学, 地球物質科学研究センター, 客員研究員 (80359207)
• Co-Investigator(Kenkyū-buntansha): KIDO Yukari 海洋研究開発機構, 地球深部探査センター, 技術主任 (20359194)
• Research Collaborator: HIRAUCHI Kenichi 広島大学, 大学院・理学研究科, 学振特別研究員(PD) (10633290)
• Project Period (FY): 2008 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2010: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2008: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: テクトニクス / 蛇紋岩 / 地磁気ダイポール異常 / 間欠貫入 / 変成変形過程

Research Abstract

Preliminary study on tectonomagnetic evolution of serpentinites in southwestern Japan was carried out to verify the hypothesis of fossil serpentine diapirs indicated from a series of dipole magnetic anomalies。Structural and magnetic study in field to microscopic scale revealed two stage serpentinization accompanied by similar magnetic property within four areas. Shear deformation during second stage serpentinization implies extrusion of serpentinites.

Research Products

• [Journal Article] Heat flow estimated from BSR and IODP borehole data: Implication of recent uplift and erosion of the imbricate thrust zone in the Nankai Trough off Kumano (2011)
  • Author(s): Kinoshita, M., G. F. Moore, and Y. N. Kido
  • Journal Title: Geochem. Geophys.Geosyst Volume: 12 Issue: 9 Pages: n/a-n/a
  • DOI: 10.1029/2011gc003609
  • Peer Reviewed
• [Journal Article] Mineral classification from quantitative X-ray maps using Neural Network : Application to volcanic rocks (2010)
  • Author(s): Tsuji, T., Yamaguchi, H., Ishii T. and T. Matsuoka
  • Journal Title: Island Arc Volume: Vol.19 Pages: 105-119
  • Peer Reviewed
• [Journal Article] Crustal evolution of the southwestern Kuril Arc, Hokkaido Japan, deduced from seismic velocity and geochemical structure (2009)
  • Author(s): Nakanishi A., Kurashimo E., Tatsumi Y., Yamaguchi H., Miura S., Kodaira S., Obana K., Takahashi N., Tsuru T., Kaneda Y., Iwasaki T., and N. Hirata
  • Journal Title: Tectonophysics Volume: Vol.472 Pages: 105-123
  • Peer Reviewed
• [Journal Article] Horizontal shortening versus vertical loading in accretionary prisms (2009)
  • Author(s): Raimbourg, H., Shibata, T., Yamaguchi, A., Yamaguchi, H. and G, Kimura
  • Journal Title: Geochemisty Geophisics Geosystems Volume: 10 Issue: 4
  • DOI: 10.1029/2008gc002279
  • Peer Reviewed
• [Journal Article] Gravity and magnetic constraints on the crustal structure and evolution of the Horeki seamount in the Izu-Ogasawara(Bonin) arc (2009)
  • Author(s): Fujiwara, T., Kido, Y., Tamura, Y., and O. Ishizuka
  • Journal Title: EPS Volume: Vol.61 Pages: 333-343
  • Peer Reviewed
• [Journal Article] Kumano-nada 3D seismic data acquisition and processing (2009)
  • Author(s): Uraki, S., Kido, Y., Sanada, Y., Kuramoto, S., Okano, T., Saga, H., Park, J-O., Moore, G., and A. Taira
  • Journal Title: Butsuri-Tansa(Geophys. Explor.) Volume: Vol.62, No.2 Pages: 277-288
  • NAID: 10025643368
  • Peer Reviewed
• [Journal Article] Crustal evolution of the southwestern Kuril Arc, Hokkaido Japan, deduced from seismic velocity and geochemical structure (2009)
  • Author(s): Nakanishi A.
  • Journal Title: Tectonophysics 472 Pages: 105-123
  • Peer Reviewed
• [Journal Article] Horizontal shortening versus vertical loading in accretionary prisms (2009)
  • Author(s): Raimbourg, H.
  • Journal Title: Geochemisty Geophisics Geosystems 10(Epub)
  • Peer Reviewed
• [Journal Article] Fertile abbysal peridotites within the Franciscan subduction complex, central California : Possible origin as detached remnants of oceanic fracture zones near a slow-spreading ridge (2008)
  • Author(s): Hirauchi, K., Tamura, A., Arai, S., Yamaguchi H. and K. Hisada
  • Journal Title: Lithos Volume: Vol.105 Pages: 319-328
  • Peer Reviewed
• [Journal Article] Fertile abbysal peridotites within the Franciscan subduction complex, central California ; Possible origin as detached remnants of oceanic fracture zones near a slow-spreading ridge. (2008)
  • Author(s): Hirauchi, K., Tamura, A., Arai, S., Yamaguchi H., K. Hisada
  • Journal Title: Lithos 105 Pages: 319-328
  • Peer Reviewed
• [Presentation] 西南日本外帯の地磁気ダイポール異常を示す蛇紋岩の組織と岩石磁気特性 (2011)
  • Author(s): 山口はるか, 平内健一, 木戸ゆかり
  • Organizer: 日本地質学会
  • Place of Presentation: 茨城
  • Year and Date: 2011-09-11
• [Presentation] 西南日本外帯の地磁気ダイポール異常を示す蛇紋岩の組織と岩石磁気特性 (2011)
  • Author(s): 山口はるか、平内健一、木戸ゆかり
  • Organizer: 日本地質学会
  • Place of Presentation: 茨城大学(茨城県)
  • Year and Date: 2011-09-11
• [Presentation] 四国ダイポール異常を示す蛇紋岩の磁気解析 (2010)
  • Author(s): 山口はるか, 木戸ゆかり, 平内健一
  • Organizer: 変成岩シンポジウム
  • Place of Presentation: 広島
  • Year and Date: 2010-03-21
• [Presentation] 西南日本外帯の地磁気ダイポール異常を示す蛇紋岩の組織と磁気特性 (2009)
  • Author(s): 山口はるか, 平内健一, 木戸ゆかり
  • Organizer: 日本地質学会
  • Place of Presentation: 岡山
  • Year and Date: 2009-09-04
• [Presentation] 磁気ダイポール異常を示す西南日本外帯蛇紋岩の組織と磁気特性 (2009)
  • Author(s): 山口 はるか
  • Organizer: 日本地質学会
  • Place of Presentation: 岡山
  • Year and Date: 2009-09-04
• [Presentation] 地磁気ダイポール異常を示す四国蛇紋岩の変形過程と磁気特性 (2008)
  • Author(s): 山口はるか, 平内健一, 木戸ゆかり
  • Organizer: 地球惑星科学連合学会
  • Place of Presentation: 千葉
  • Year and Date: 2008-05-25
• [Presentation] 地磁気ダイポール異常を示す四国蛇紋岩の変形過程と磁気特性 (2008)
  • Author(s): 山口はるか, 平内健一, 木戸ゆかり
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2008-05-25
• [Presentation] プレート境界断層を充填する鉱物脈の微細組織・微細化学組成 (2008)
  • Author(s): 山口飛鳥, 草葉陽子, 山口はるか, 柴田伊廣, 氏家恒太郎, 木村学
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2008-05-25
• [Book] 海のプロフェッショナル:海洋学への招待状(窪川かおる編集) (2010)
  • Author(s): 木戸ゆかり
  • Total Pages: 173
  • Publisher: 東海大学出版会
• [Book] もし、あなをずっとほってくとちきゅうのうらにでられるの? (2010)
  • Author(s): きむらゆういち
  • Publisher: 教育画劇