Formation of crust-mantle boundary in the mid-ocean ridge

2008 Fiscal Year Final Research Report

• Project/Area Number: 18740336
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Kanazawa University
• Principal Investigator: TAMURA Akihiro Kanazawa University, フロンティアサイエンス機構, 博士研究員 (80401884)
• Project Period (FY): 2006 – 2008
• Keywords: マグマ過程 / 地殻 / マントル / 核

Research Abstract

大気と地面の境界があるように、地球内部には性質の異なる固体物質の境界があるとされている。地殻と上部マントルの境界はこのひとつであり、それぞれを構成している岩石種の物質学的なちがいにより区別される。本研究では統合国際深海掘削計画によって、大西洋の海底下から得られた地球深部を構成する岩石を解析し、いかにしてこれらの異なった岩石種が産み出されるのかその形成過程について検証した。

Research Products

• [Journal Article] Subarc magmatic and hydration processes inferred from a hornblende peridotite xenolith in spessartite from Kyoto, Japan (2009)
  • Author(s): Ishimaru S, Arai S, Tamura A, Takeuchi M, Kiji M
  • Journal Title: Journal of Mineralogical and Petrological Sciences 104 Pages: 97-104
  • Peer Reviewed
• [Journal Article] Petrology of the Yugu peridotites in the Gyeonggi Massif, South Koreas: Implications for its origin and hydration process (2008)
  • Author(s): Arai S, Tamura A, Ishimaru S, Kadoshima K, Lee YI, Hisada K
  • Journal Title: Island Arc 17 Pages: 485-501
  • Peer Reviewed
• [Journal Article] Petrology and geochemistry of peridotites from IODP Site U1309 at Atlantis Massif, MAR 30°N: micro- and macro-scale melt penetrations into peridotites (2008)
  • Author(s): Tamura A, Arai S, Ishimaru S, Andal E
  • Journal Title: Contributions to Mineralogy and Petrology 155(4) Pages: 491-509
  • Peer Reviewed
• [Journal Article] Fertile abyssal peridotites within the Franciscan subduction complex, central California: Possible origin as detached remnants of oceanic fracture zones located close to a slow-spreading ridge (2008)
  • Author(s): Hirauchi K, Tamura A, Arai S, Yamaguchi H, Hisada K-I
  • Journal Title: Lithos 105(3-4) Pages: 319-328
  • Peer Reviewed
• [Journal Article] Geochemistry of apatite-rich layers in the Finero phlogopite-peridotite massif (Italian Western Alps) and ion microprobe dating of apatite (2008)
  • Author(s): Morishita T, Hattori KH, Terada K, Matsumoto T, Yamamoto K, Takebe M, Ishida Y, Tamura A, Arai S
  • Journal Title: Chemical Geology 251(1-4) Pages: 99-111
  • Peer Reviewed
• [Journal Article] Oceanic core complexes and crustal accretion at slow-spreading ridges (2007)
  • Author(s): Ildefonse B, Blackman DK, John BE, Ohara Y, Miller DJ, Macleod CJ, IODP Expeditions 304/305 Science party
  • Journal Title: Geology 35 Pages: 623-626
  • Peer Reviewed
• [Journal Article] IODP 304/305航海で得られたかんらん岩の成因 大西洋中央海嶺の海洋底かんらん岩の多様性 (2007)
  • Author(s): 田村明弘・荒井章司・石丸聡子・アンダルエリック
  • Journal Title: 月刊地球 海洋プレートと島弧の深部構造-III IODP超深度掘削へ向けて Pages: 682-690
• [Journal Article] Geochemistry of clinopyroxene in peridotites from the Nukabira complex, Kamuikotan zone, Hokkaido, Japan: a LA-ICP-MS study (2006)
  • Author(s): Tamura A, Arai S
  • Journal Title: The Science Reports of Kanazawa University 50 Pages: 1-27
• [Journal Article] Harzburgite-dunite-orthopyroxenite suite as a record of supra-subduction zone setting for the Oman ophiolite mantle (2006)
  • Author(s): Tamura A, Arai S
  • Journal Title: Lithos 90(1-2) Pages: 43-56
  • Peer Reviewed
• [Journal Article] Geochemical characteristics of chloritization of mafic rust from the northern Oman ophiolite: Implications for estimating the chemical budget of hydrothermal alteration of the oceanic lithosphere
  • Author(s): Yoshitake N, Arai S, Ishida Y, Tamura A
  • Journal Title: Journal of Mineralogical and Petrological Sciences (in press)
  • Peer Reviewed
• [Journal Article] Igneous, alteration, and exhumation processes recorded in abyssal peridotites and related fault rocks from an oceanic core complex along the Central Indian Ridge
  • Author(s): Morishita T, Hara K, Nakamura K, Sawaguchi T, Tamura A, Arai S, Okino K, Takai K, Kumagai H
  • Journal Title: Journal of Petrology (in press) Pages: doi:10.1093/petrology/egp025
  • Peer Reviewed
• [Presentation] Geochemistry of residual peridotites from the Atlantis Massif, MAR 30°N: Inter- and intra-grain variations of clinopyroxene trace element compositions (2008)
  • Author(s): Tamura, A, Arai, S, Ishimaru, Andal, ES
  • Organizer: 国際レールゾライトワークショップ
  • Place of Presentation: カリフォルニア, 米国
  • Year and Date: 20080922-6
• [Presentation] Petrology and geochemistry of residual peridotites from Site 1309 at the Atlantis Massif, MAR 30°N (2007)
  • Author(s): Tamura, A, Arai, S, Ishimaru, S, Andal, ES
  • Organizer: IODP 304/305航海ポストクルーズミーティング
  • Place of Presentation: ハワイ, 米国
  • Year and Date: 20070916-20
• [Presentation] Residual peridotites from the Oceanic Core Complex: IODP Exp.304/305 at the Atlantis Massif, MAR 30°N (2007)
  • Author(s): Tamura, A, Arai, S, Ishimaru, S, Andal, ES
  • Organizer: 地球惑星科学関連合同大会
  • Place of Presentation: 幕張
  • Year and Date: 20070519-24
• [Presentation] 海洋コアコンプレックス中の上部マントルかんらん岩 : IODP Exp. 304/305@大西洋中央海嶺北緯30°アトランティス岩体 (2007)
  • Author(s): 田村明弘・荒井章司・石丸聡子・アンダルエリック
  • Organizer: 東京大学海洋研究所共同利用研究集会, 海洋プレートと島弧の深部構造 : IODP 超深度掘削へ向けて
  • Place of Presentation: 東京
  • Year and Date: 20070219-20
• [Presentation] Geochemistry of clinopyroxene in peridotites from the Nukabira complex, northern Japan: residue of multi-stage melting (2006)
  • Author(s): Tamura, A, Arai, S
  • Organizer: 国際鉱物学会
  • Place of Presentation: 神戸
  • Year and Date: 20060000