Deformation and processes of physical evolution of sediments in 2-3 km burial depth at subduction zone

• Project/Area Number: 21740363
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Geology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: YAMAMOTO Yuzuru Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, 研究員 (10435753)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: テクトニクス / 付加体 / 地震 / 沈み込み帯 / 粘土鉱物 / メランジュ

Research Abstract

Change in deformation styles and the related transition from smectite to illite within the aseismic-seismic transition zone (2-4 km below the seafloor) in a subduction zone were analyzed by studying an onland accretionary complex that was previously buried to a depth of just 2-4 km. Such strain hardening associated with the clay mineral transition and decrease in porosity is the primary mechanism of thickening of the decollement and/or melange zone, and represents a fundamental mechanical/chemical change in the properties of sediments immediately before entering the seismogenic zone.

Research Products

• [Journal Article] Systematic variation of fabric and physical properties in mass transfer deposits in the Ursa region, Northern Gulf of Mexico (2011)
  • Author(s): Yuzuru Yamamoto
  • Journal Title: Advances in Natural and Technological Hazards Research Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] Systematic development of submarine slope failures at subduction margins : fossil record of accretion-related slope failure in the Miocene Hota Accretionary Complex, Central Japan (2011)
  • Author(s): Yuzuru Yamamoto
  • Journal Title: Advances in Natural and Technological Hazards Research Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] Submarine landslides at subduction margins : insight from physical models. (2010)
  • Author(s): Yamada, Y., Yamashita, Y. Yamamoto, Y.
  • Journal Title: Tectonophysics 484 Pages: 156-167
  • NAID: 120002949720
  • Peer Reviewed
• [Journal Article] Smectite swelling in the Miura-Boso accretionary prism : Possible cause for incipient decollement zone formation. (2010)
  • Author(s): Kameda, J., Yamamoto, Y., Kimura, G.
  • Journal Title: Tectonophysics 494 Pages: 75-84
  • Peer Reviewed
• [Journal Article] 三浦・房総半島の海底地すべり堆積物の産状と区分 (2010)
  • Author(s): 山本由弦
  • Journal Title: 月刊地球 号外61 Pages: 136-145
• [Journal Article] Smectite swelling in the Miura-Boso accretionary prism : Possible cause for incipient decollement zone formation (2010)
  • Author(s): Kameda Jun
  • Journal Title: Tectonophysics Volume: 484 Pages: 156-167
  • Peer Reviewed
• [Journal Article] Submarine landslides at subduction margins : insight from physical models (2010)
  • Author(s): Yasuhiro Yamada
  • Journal Title: Tectonophysics 484 Pages: 156-167
  • Peer Reviewed
• [Journal Article] Formation of chaotic rock-units during primary accretion processes : examples from the Miura. (2009)
  • Author(s): Yamamoto, Y., Nidaira, M., Ohta, Y., Ogawa, Y.
  • Journal Title: Boso accretionary complex. Central Japan. Island Arc 18 Pages: 496-512
  • Peer Reviewed
• [Journal Article] Formation of chaotic rock-units during primary accretion processes : examles from the Miura-Boso accretionary complex, Central Japan. (2009)
  • Author(s): Yuzuru Yamamoto
  • Journal Title: Island Arc 18 Pages: 496-512
  • Peer Reviewed
• [Journal Article] Fabric-based criteria to distinguish tectonic from sedimentary melanges in the Shimanto accretionary complex, Yakushima Island, SW Japan.
  • Author(s): Yamamoto, Y., Tonogai, K., Anma, R.
  • Journal Title: Tectonophysics, TECTO07522. in press
  • Peer Reviewed
• [Journal Article] Systematic variation of fabric and physical properties in mass transfer deposits in the Ursa region, Northern Gulf of Mexico. In Yamada, Y., et. al. (eds) Submarine Mass Movements and Their Consequences.
  • Author(s): Yamamoto, Y.,, Sawyer, D., E.
  • Journal Title: Advances in Natural and Technological Hazards Research Series.(Springer) in press
  • Peer Reviewed
• [Journal Article] Systematic development of submarine slope failures at subduction margins : fossil record of accretion-related slope failure in the Miocene Hota Accretionary Complex, Central Japan. In Yamada, Y., et al. (eds) Submarine Mass Movements and Their Consequences.
  • Author(s): Yamamoto, Y., Yamada, Y., Yamashita, Y., Chiyonobu, S., Shibata, T., Hojo, M.
  • Journal Title: Advances in Natural and Technological Hazards Research Series(Springer) in press
  • Peer Reviewed
• [Presentation] Three-dimensional stress orientation in the basement basalt at the subduction input site, Nankai Subduction Zone, using anelastic strain recovery (ASR) data. (2010)
  • Author(s): Yamamoto, Y.
  • Organizer: IODP NanTroSEIZE Site C0012. AGU
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2010-12-14
• [Presentation] Three-dimensional stress orientation in the basement basalt at the subduction input site, Nankai Subduction Zone, using anelastic strain recovery (ASR) data, IODP NanTroSEIZE Site C0012 (2010)
  • Author(s): Yuzuru Yamamoto
  • Organizer: AGU
  • Place of Presentation: Moscone Convention Center, San Francisco, U.S.A.
  • Year and Date: 2010-12-14
• [Presentation] Formation processes of chaotic rock-units during primary accretion processes : Liquefaction and mass transport deposits in the Miura Boso Accretionary prism, central Japan. (2010)
  • Author(s): Yamamoto, Y.
  • Organizer: GSA Tectonic crossroads Conference.
  • Place of Presentation: Ankara, Turkey
  • Year and Date: 2010-10-08
• [Presentation] Onland accretionary wedge in the Miura and Boso peninsulas, central Japan : one of the best analogs of modern subduction-accretion system. (2010)
  • Author(s): Yamamoto, Y.
  • Organizer: GSA Tectonic crossroads Conference.
  • Place of Presentation: Ankara, Turkey
  • Year and Date: 2010-10-08
• [Presentation] Onland accretionary wedge in the Miura and Boso peninsulas, central Japan : one of the best analogs of modern subduction-accretion system (2010)
  • Author(s): Yuzuru Yamamoto
  • Organizer: GSA Tectonic crossroads Conference
  • Place of Presentation: Middle East Technical University, Ankara, Turkey
  • Year and Date: 2010-10-08
• [Presentation] Formation processes of chaotic rock-units during primary accretion processes : Liquefaction and mass transport deposits in the Miura Boso Accretionary prism, central Japan (2010)
  • Author(s): Yuzuru Yamamoto
  • Organizer: GSA Tectonic crossroads Conference
  • Place of Presentation: Middle East Technical University, Ankara, Turkey
  • Year and Date: 2010-10-08
• [Presentation] Thickening of tectonic melanges due to clay-mineral transition in 2-4km depth in subduction zone : Hota accretionary complex, central Japan. (2010)
  • Author(s): Yamamoto, Y.
  • Organizer: GSA Tectonic crossroads Conference
  • Place of Presentation: Ankara, Turkey
  • Year and Date: 2010-10-05
• [Presentation] Thickening of tectonic melanges due to clay-mineral transition in 2-4 km depth in subduction zone: Hota accretionary complex, central Japan (2010)
  • Author(s): Yuzuru Yamamoto
  • Organizer: GSA Tectonic crossroads Conference
  • Place of Presentation: Middle East Technical University, Ankara, Turkey
  • Year and Date: 2010-10-05
• [Presentation] 南海および陸上の付加体をつなげる三浦・房総半島の付加体・被覆層システム (2010)
  • Author(s): 山本由弦
  • Organizer: 地質学会117大会
  • Place of Presentation: 富山
  • Year and Date: 2010-09-19
• [Presentation] 南海および陸上の付加体をつなげる三浦・房総半島の付加体・被覆層システム (2010)
  • Author(s): 山本由弦
  • Organizer: 日本地質学会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2010-09-19
• [Presentation] Decollement zone thickening due to clay-mineral transition in 2-4 km buried subduction zone : Hota accretionary complex, central Japan. (2010)
  • Author(s): Yamamoto, Y.
  • Organizer: WPGM
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2010-06-23
• [Presentation] Decollement zone thickening due to clay-mineral transition in 2-4 km buried subduction zone : Hota accretionary complex, central Japan (2010)
  • Author(s): Yuzuru Yamamoto
  • Organizer: WPGM
  • Place of Presentation: Taipei International Convention Center, Taipei, Taiwan
  • Year and Date: 2010-06-23
• [Presentation] 沈み込み帯の深度2-4 km における堆積物変形と粘土鉱物組成変化:房総半島中部中新統保田層群 (2010)
  • Author(s): 山本由弦
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張
  • Year and Date: 2010-05-25
• [Presentation] 沈み込み帯の深度2-4kmにおける堆積物変形と粘土鉱物組成変化:房総半島中部中新統保田層群 (2010)
  • Author(s): 山本由弦
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2010-05-25
• [Presentation] Fabric variation and primary heterogeneity of subduction input, off Kii Peninsula : Preliminary results from IODP Expedition 322. (2010)
  • Author(s): Yamamoto, Y.
  • Organizer: JPGU Meeting
  • Place of Presentation: Makuhari, Japan
  • Year and Date: 2010-05-23
• [Presentation] Fabric variation and primary heterogeneity of subduction input, off Kii Peninsula : Preliminary results from IODP Expedition 322 (2010)
  • Author(s): Yuzuru Yamamoto
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2010-05-23
• [Presentation] 房総半島保田層群にみられる沈み込み帯深度2-4kmの変形と粘土鉱物組成変化:-C0004との比較-. (2010)
  • Author(s): 山本由弦
  • Organizer: KANAME研究集会
  • Place of Presentation: 熊本
  • Year and Date: 2010-03-08
• [Presentation] 房総半島保田層群にみられる沈み込み帯深度2-4kmの変形と粘土鉱物組成変化:-C0004との比較- (2010)
  • Author(s): 山本由弦
  • Organizer: KANAME研究集会
  • Place of Presentation: 休暇村南阿蘇(熊本)
  • Year and Date: 2010-03-08
• [Presentation] Deformation characteristics and associated clay-mineral variation in 2-3km buried Hota accretionary complex, central Japan. (2009)
  • Author(s): Yamamoto, Y.
  • Organizer: AGU
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2009-12-15
• [Presentation] Deformation characteristics and associated clay-mineral variation in 2-3km buried Hota accretionary complex, central Japan (2009)
  • Author(s): Yuzuru Yamamoto
  • Organizer: AGU
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2009-12-15
• [Presentation] Earthquake-induced submarine sliding in the Pleistocene trench-slope-basin sediment, central Japan : comparative study between geological and physical model. (2009)
  • Author(s): Yamamoto, Y.
  • Organizer: IGCP511
  • Place of Presentation: Austin, USA
  • Year and Date: 2009-11-09
• [Presentation] Comparative study of geological and physical model of earthquake-induced submarine sliding in the Pleistocene trench-slope-basin sediment, central Japan. (2009)
  • Author(s): Yamamoto, Y.
  • Organizer: GSK Meeting,
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2009-10-30
• [Presentation] Comparative study of geological and physical model of earthquake-induced submarine sliding in the Pleistocene trench-slope-basin sediment, central Japan (2009)
  • Author(s): Yuzuru Yamamoto
  • Organizer: GSK Meeting
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2009-10-30
• [Presentation] 沈み込み帯における断続的な海底地すべりの発達様式:地質とモデル実験の比較 (2009)
  • Author(s): 山本由弦
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張
  • Year and Date: 2009-05-19
• [Presentation] 関東アスペリティプロジェクトにおける地質・テクトニクス的な展望 (2009)
  • Author(s): 山本由弦
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張
  • Year and Date: 2009-05-19
• [Presentation] 沈み込み帯における断続的な海底地すべりの発達様式:地質とモデル実験の比較 (2009)
  • Author(s): 山本由弦
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2009-05-19
• [Presentation] 関東アスペリティプロジェクトにおける地質・テクトニクス的な展望 (2009)
  • Author(s): 山本由弦
  • Organizer: 日本地球惑星科学連合大
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2009-05-19