Deformation structures and active processed of Enshu active faults

• Project/Area Number: 20510169
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Natural disaster science
• Research Institution: The University of Tokyo
• Principal Investigator: ASHI Juichiro The University of Tokyo, 大学院・新領域創成科学研究科, 准教授 (40251409)
• Co-Investigator(Kenkyū-buntansha): NAKAMURA Yasuyuki 東京大学, 大気海洋研究所, 助教 (60345056)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 活断層 / 自然災害 / 地質学 / テクトニクス / 海洋探査 / 前弧海盆 / 泥火山 / 海底谷 / 海洋探査航 / マッドリッジ

Research Abstract

Distributions and historical changes of active faults in the area off Tokai and Kumano were investigated by seismic reflection survey. Dense seismic survey off Kumano revealed three lines of ENE-WSW trending blind faults. Relative uplift of the northwestern region was dominant and regional uplift of basin center is prominent in recent age. Studies of topography and previously obtained seismic survey data indicate that reverse faulting with dextral strike slip has been active in the area off Tokai and Enshu for a long period.

Research Products

• [Presentation] Distribution and structure of active strike-slip faults in the Enshu forearc basin of the eastern Nankai subduction zone (2010)
  • Author(s): 小嶋孝徳
  • Organizer: 米国地球物理学連合
  • Place of Presentation: サンフランシスコ(米国)
  • Year and Date: 2010-12-13
• [Presentation] Distribution and structure of active strike-slip faults in the Enshu forearc basin of the eastern Nankai subduction zone (2010)
  • Author(s): 小嶋孝徳
  • Organizer: 米国地球物理学連合
  • Place of Presentation: サンフランシスコ,米国
  • Year and Date: 2010-12-13
• [Presentation] 東海～熊野灘に発達する遠州断層系の構造とその形成過程について (2010)
  • Author(s): 小嶋孝徳
  • Organizer: 日本地質学会
  • Place of Presentation: 富山大学
  • Year and Date: 2010-09-20
• [Presentation] 東海～熊野灘に発達する遠州断層系の構造とその形成過程について (2010)
  • Author(s): 小嶋孝徳
  • Organizer: 日本地質学会
  • Place of Presentation: 富山大学共通教育棟(富山県)
  • Year and Date: 2010-09-20
• [Presentation] 志摩海脚の断層変形と遠州断層系の活動 (2009)
  • Author(s): 芦寿一郎
  • Organizer: 日本地震学会
  • Place of Presentation: 京都大学
  • Year and Date: 2009-10-22
• [Presentation] 反射法地震探査による熊野トラフの泥火山と周辺堆積盆の地質構造 (2009)
  • Author(s): 谷岡慧
  • Organizer: 日本地質学会
  • Place of Presentation: 岡山大学
  • Year and Date: 2009-09-06
• [Presentation] 遠州断層系活断層群の分布と変形構造 (2008)
  • Author(s): 芦寿一郎
  • Organizer: 日本地質学会
  • Place of Presentation: 秋田大学
  • Year and Date: 2008-09-21