Origin of the Ontong Java Plateau-Mantle plume Impacts? or Abnormal seafloor spreading?

2009 Fiscal Year Final Research Report

• Project/Area Number: 18340129
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: NAKAMURA Yasuyuki The University of Tokyo, 海洋研究所, 助教 (60345056)
• Co-Investigator(Kenkyū-buntansha): NAKANISHI Masao 千葉大学, 大学院・理学研究科, 准教授 (80222165) ; MOCHIZUKI Kimihiro 東京大学, 地震研究所, 助教 (80292861) ; KODAIRA Shuichi 海洋研究開発機構, 地球内部ダイナミクス領域, 上席研究員 (80250421)
• Project Period (FY): 2006 – 2009
• Keywords: 巨大火成岩岩石区 / 地殻・マントル物質 / 地球・惑星内部構造 / テクトニクス

Research Abstract

We conducted marine geophysical surveys in and around the Ontong Java Plateau, the most voluminous large igneous province (LIP), to reveal the origin of the plateau. Intrabasement reflectors arise from altenating relatively thin lava flows produced at low effusion rates and relatively thick massive flows generated at high effusion rate. Geophysical investigation in the Lyra Basin, west of the Ontong Java Plateau, was also conducted. Bathymetric measurements revealed the topographic expression of the Lyra Trough. Seismic profiles at the eastern edge of the Lyra Basin showed deformed structure in the sedimentary layer.

Research Products

• [Journal Article] Intrabasement reflections of the Ontong Java Plateau : implications for plateau construction (2008)
  • Author(s): Inoue, H., Coffin, M. F., Nakamura, Y., Mochizuki, K., Kroenke, L. W.
  • Journal Title: Geochemistry Geophysics Geosystems (G3) 9 Q04014 Pages: doi : 10.29/2007G0001780
  • Peer Reviewed
• [Journal Article] Oceanic crust and Moho of the Pacific Plate in the eastern Ogasawara Plateau region (2007)
  • Author(s): Tsuji, T., Nakamura, Y., Tokuyama, H., Coffin, M. F., Koda, K.
  • Journal Title: Island Arc 16 Pages: 361-373
  • Peer Reviewed
• [Journal Article] Contemporaneous massive subaerial volcanism and Late Cretaceous Oceanic Anoxic Event 2 (2007)
  • Author(s): Kuroda, J., Ogawa, N. O., Tanimizu, M., Coffin, M. F., Tokuyama, H., Kitazato, H., Ohkouchi, N.
  • Journal Title: Earth and Planetary Science Letters 256 Pages: 211-223
  • Peer Reviewed
• [Journal Article] Depleted mantle wedge and sediment signature in unusual basalts from the Manihiki Plateau (2007)
  • Author(s): Ingle, S. P., Mahoney, J. J., Sato, H., Coffin, M. F., Kimura, J. -I., Nakanishi, M.
  • Journal Title: Central Pacific, Geology 35 Pages: 595-598
  • Peer Reviewed
• [Journal Article] Large igneous provinces and scientific ocean drilling : status quo and a look ahead (2006)
  • Author(s): Coffin, M. F., Duncan, R. A., Eldholm, O., Fitton, J. G., Frey, F. A., Larsen, H. C., Mahoney, J. J., Saunders, A. D., Schlich, R., Wallace, P. J.
  • Journal Title: Oceanography 19(4) Pages: 150-160
  • Peer Reviewed
• [Presentation] シャツキーライズ形成前の太平洋-イザナギ-ファラオン三重会合点の再配列 : YK08-09航海における地球物理学観測 (2010)
  • Author(s): 中西正男・野口徹・馬場聖至・YK08-09乗船研究者一同
  • Organizer: ブルーアースシンポジウム
  • Place of Presentation: 東京
  • Year and Date: 2010-03-03
• [Presentation] シャツキーライズ形成前の太平洋-イザナギ-ファラオン三重会合点の再配列 : YK08-09航海における地球物理学観測 (2009)
  • Author(s): 中西正男・馬場聖至・YKO8109 乗船研究者
  • Organizer: 地球惑星科学関連学会連合大会
  • Place of Presentation: 千葉
  • Year and Date: 2009-05-18
• [Presentation] Tertiary Magmatism on the Early Cretaceous Ontong Java Plateau (2008)
  • Author(s): Coffin, M. F, H. Inoue, K. Mochizuki, Y. Nakamura, L. Kroenke
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2008-12-16
• [Presentation] Lyra 海盆の地形的特徴 : KR06-16地球物理学観測の結果 (2008)
  • Author(s): 中西正男・磯部太祐・佐野貴司・清水健二
  • Organizer: ブルーアースシンポジウム
  • Place of Presentation: 横浜
  • Year and Date: 2008-03-14
• [Presentation] Lyra 海盆のテクトニクス : オントンジャワ海台形成過程との関係 (2008)
  • Author(s): 中西正男・佐野貴司・清水健二・KR06-16 乗船者一同
  • Organizer: ブルーアースシンポジウム
  • Place of Presentation: 横浜
  • Year and Date: 2008-03-14
• [Presentation] ライラ海盆火山砕屑岩の地球化学的研究-オントンジャワ海台の活動末期マグマの発見? (2008)
  • Author(s): 清水健二・佐野貴司・マリッサ テハダ・常青・佐藤佳子・鈴木勝彦・中西正男
  • Organizer: ブルーアースシンポジウム
  • Place of Presentation: 横浜
  • Year and Date: 2008-03-14
• [Presentation] Tectonic Setting of the Lyra Basin, west of the Ontong Java Plateau (2007)
  • Author(s): Nakanishi M., Sano T, Shimizu K
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 20071210-20071214
• [Presentation] A. P., Seamounts, knolls and petit spots on the NW Pacific Plate from Cretaceous to present (2007)
  • Author(s): Hirano N., Nakanishi M, Koppers A.
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 20071210-20071214
• [Presentation] Large Igneous Provinces of the Pacific : Insights into Mantle Dynamics and LIP Construction (2007)
  • Author(s): Coffin, M. F.
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2007-12-10
• [Presentation] F. S. Sonne 193 Scientific Party, Extensional and Transtensional Tectonics of the Manihiki Plateau (2007)
  • Author(s): Coffin, M. F., Werner, R., Hauff, F., Hoernle, K.
  • Organizer: Western Equatorial Pacific Ocean, American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2007-12-10
• [Presentation] the S0193 Scientific Party, R/V Sonne Cruise S0193 : New Insights into the Geodynamic History of the Manihiki Plateau (2007)
  • Author(s): Werner, R., Hauff, F., Hoernle, K., Coffin, M. F.
  • Organizer: SW Pacific, American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2007-12-10
• [Presentation] The IODP Proposal Process (2007)
  • Author(s): Coffin, M. F.
  • Organizer: Marine Impacts and Environmental Consequences Workshop
  • Place of Presentation: Longyearbyen, NORWAY
  • Year and Date: 2007-09-11
• [Presentation] Hotspots and Continental Breakup : The Intermediate, Asynchronous Case of Kerguelen and Eastern Gondwana (2007)
  • Author(s): Coffin, M. F.
  • Organizer: Large Igneous Provinces Workshop
  • Place of Presentation: Coleraine, UK
  • Year and Date: 2007-07-24
• [Presentation] Recent Manihiki Plateau Results (2007)
  • Author(s): Coffin, M. F.
  • Organizer: Large Igneous Provinces Workshop
  • Place of Presentation: Coleraine, UK
  • Year and Date: 2007-07-24
• [Presentation] Intraplate Large Igneous Provinces (2007)
  • Author(s): Coffin, M. F.
  • Organizer: Large Igneous Provinces Workshop
  • Place of Presentation: Coleraine, UK
  • Year and Date: 2007-07-23
• [Presentation] Ontong Java Plateau IODP Proposal and Recent Manihiki Plateau Results (2007)
  • Author(s): Coffin, M. F.
  • Organizer: Large Igneous Provinces/Oceanic Anoxic Events Workshop
  • Place of Presentation: Yokosuka, JAPAN
  • Year and Date: 2007-07-13
• [Presentation] Lyra 海盆のテクトニクスーオントンジャワ海台形成過程との関係 (2007)
  • Author(s): 中西正男・佐野貴司・清水健二・KR06-16研究航海乗船者一同
  • Organizer: 地球惑星科学関連学会連合大会
  • Place of Presentation: 千葉
  • Year and Date: 2007-05-23
• [Presentation] Relationship between the Ontong Java Plateau and its neighboring ocean basins : Insights into plateau formation (2006)
  • Author(s): Coffin, M. F, H. Inoue, K. Mochizuki, Y. Nakamura, L. Kroenke
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 20061211-20061215