Fluid distribution around the spray fault using the controlled source EM survey technique.

• Project/Area Number: 20740263
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: KASAYA Takafumi Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, 技術研究副主任 (90373456)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 観測手法 / 沈み込み帯 / 比抵抗構造 / 比抵抗 / 海底電気探査 / 分岐断層 / 海底電位磁力計 / OBEM / 奮起断層 / MT法 / 人工電磁探査

Research Abstract

To investigate the detailed fluid distribution, I renewed our existing deep-towed DC resistivity meter system to improve its performance. The first test observation was conducted in 2009, and an OBEM could obtain the EM signal from this renewed system. On the other hand, new inversion technique with sharp boundary has been improved. As the result, a sharp plate boundary around the plate boundary could be detected using EM data.

Research Products

• [Journal Article] Improvement of the Electro-Magnetic survey instrument of JAMSTEC (2011)
  • Author(s): T.Kasaya.
  • Journal Title: Underwater technology 2011(Tokyo) CD-ROM
  • Peer Reviewed
• [Journal Article] 境界面を組み込んだMT法の2次元インバージョン (2010)
  • Author(s): 木村・後藤・笠谷, ほか
  • Journal Title: 物理探査 63 Pages: 185-196
  • Peer Reviewed
• [Journal Article] 境界面を組み込んだMT法の2次元インバージョン (2010)
  • Author(s): 木村俊則
  • Journal Title: 物理探査 Volume: 63 Pages: 185-196
  • Peer Reviewed
• [Journal Article] A small ocean bottom electromagnetometer and ocean bottom electorometer system with an arm-folding mechanism. (2009)
  • Author(s): T.Kasaya., T.Goto.
  • Journal Title: Exploration Geophysics. 40 Pages: 41-48
  • Peer Reviewed
• [Journal Article] 海底電磁探査の近年の進歩とメタンハイドレード (2009)
  • Author(s): 後藤・桜井・高木・笠谷
  • Journal Title: 地学雑誌 118 Pages: 935-954
  • Peer Reviewed
• [Journal Article] 海底電磁探査の近年の進歩とメタンハイドレード (2009)
  • Author(s): 笠谷貴史
  • Journal Title: 地学雑誌 118 Pages: 935-954
  • Peer Reviewed
• [Journal Article] A small ocean bottom electromagnetometer and ocean bottom electorometer system with an arm-folding mechanism (2009)
  • Author(s): T.Kasaya
  • Journal Title: Exploration Geophysics 40 Pages: 41-48
  • Peer Reviewed
• [Journal Article] A marine deep-towed DC resistivity surevey in a methane hydrate area, Japan sea. (2008)
  • Author(s): Goto, T., T.Kasaya., H.Machiyama, R.Takagi, R.Matsumoto, Y.Okuda, M.Satoh, T.Watanabe, N.Seama, H.Mikada, Y.Sanada, M.Kinoshita.
  • Journal Title: Exploration Geophysics vol.39 Pages: 52-59
  • Peer Reviewed
• [Patent(Industrial Property Rights)] 回収型観測機器 (2009)
  • Inventor(s): 笠谷貴史・後藤忠徳・金沢敏彦・岡部圭二
  • Industrial Property Rights Holder: 独立行政法人海洋研究開発機構
  • Filing Date: 2009-07-24