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Significance of of-axis magmatism for the accretion of oceanic crustal

Research Project

Project/Area Number 23540530
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geology
Research InstitutionNiigata University

Principal Investigator

MIYASHITA Sumio  新潟大学, 自然科学系, フェロー (60200169)

Research Collaborator KANEKO Rhu  新潟大学, 自然科学研究科
KUSANO Yuki  金沢大学, 理工研究域, 博士研究員
Project Period (FY) 2011-04-28 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords海洋地殻 / 海嶺 / オフィオライト / オマーン / オフアクシス火成活動 / 海嶺セグメント / マグマ / オマーンオフィオライト
Outline of Final Research Achievements

Detailed volcanic stratigraphy in the Oman ophiolite exhibits lava accretion processes around fast-spreading ridges. The V1 sequence is divided into the lower V1 (LV1) and upper V1 (UV1) by 0.4-m thick umber layer. The lowest part of the LV1 consists of lobate sheet and pillow lava flows extruded on the flat ridge crest. Elongate pillows occurred at 230 mab (meters above the base of the extrusives) is originated from flowing down lavas and characterizes ridge frank. Accretion process at the off-axis area is recorded in the UV1 consisting of pahoehoe flows, lobate sheet flows and pillow lavas. Depleted lavas covering the 0.4-m thick umber suggest that these lavas derived from more depleted mantle source or underwent higher degree of partial melting. Because the depleted lavas are covered repeatedly by evolved lavas with similar compositions to lava in the LV1, the off-axis lava sequence should be pileup of lava flows erupted at off-axis and transported from ridge axis, repeatedly.

Report

(5 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (52 results)

All 2014 2013 2012 2011 Other

All Journal Article (10 results) (of which Peer Reviewed: 7 results) Presentation (41 results) (of which Invited: 2 results) Remarks (1 results)

  • [Journal Article] Origin of large wehrlitic intrusions found from Wadi Barghah to Salahi area in the northern Oman ophiolite2014

    • Author(s)
      Kaneko, K., Adachi, Y. and Miyashita, S.
    • Journal Title

      Geological Society, London, Special Publications

      Volume: 392 Issue: 1 Pages: 205-220

    • DOI

      10.1144/sp392.11

    • Related Report
      2014 Annual Research Report 2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Origin of large wehrlitic intrusions found from Wadi Barghah to Salahi area in the northern Oman ophiolite2014

    • Author(s)
      Kaneko, K., Adachi, Y. and Miyashita, S.
    • Journal Title

      Tectonic Evolution of the Oman Mountains (Geological Society, London, Special Publications) (In Rollinson, H.R., Searle, M.P., Abbasi, I.A., Al-Lazki, A. and Al Kindi, M.H. (eds.))

      Volume: 392 Issue: 1 Pages: 205-220

    • DOI

      10.1144/sp392.8

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 海洋下部地殻への挑戦:1256D掘削孔での成果2014

    • Author(s)
      宮下純夫・海野 進
    • Journal Title

      月刊地球号外

      Volume: 64 Pages: 74-80

    • Related Report
      2014 Annual Research Report
  • [Journal Article] Evolution of volcanism and magmatism during initial arc stage: constraints on the tectonic setting of the Oman Ophiolite. In Rollinson, H.R., Searle, M.P., Abbasi, I.A., Al-Lazki, A. and Al Kindi, M.H. (eds.), Tectonic Evolution of the Oman Mountains2014

    • Author(s)
      Kusano, Y. Hayashi, M., Adachi, Y., Umino, S. and Miyashita, S.
    • Journal Title

      Geological Society, London, Special Publications

      Volume: 392 Issue: 1 Pages: 177-193

    • DOI

      10.1144/sp392.9

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] 海洋下部地殻への挑戦:1256D掘削孔での成果(Exps 309/312/335)2014

    • Author(s)
      宮下純夫・海野 進
    • Journal Title

      月刊地球号外

      Volume: 64 Pages: 74-80

    • Related Report
      2013 Research-status Report
  • [Journal Article] Petrology of Lasail plutonic complex, northern Oman ophiolite, Oman: An example of arc-like magmatism associated with ophiolite detachment2013

    • Author(s)
      Tsuchiya, N., Shibata, T., Yoshikawa, M., Adachi, Y., Miyashita, S., Adachi, T., Nakano, N., Osanai, Y.
    • Journal Title

      Lithos

      Volume: 156-159 Pages: 120-138

    • DOI

      10.1016/j.lithos.2012.10.013

    • Related Report
      2013 Research-status Report 2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Geology and metamorphism in the northern Poroshiri ophiolite, Hokkaido, Japan2012

    • Author(s)
      田中真二・木崎健治・宮下純夫
    • Journal Title

      The Journal of the Geological Society of Japan

      Volume: 118 Issue: 11 Pages: 723-740

    • DOI

      10.5575/geosoc.2012.0046

    • NAID

      130003363880

    • ISSN
      0016-7630, 1349-9963
    • Year and Date
      2012-11-15
    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Lava accretion system around mid-ocean ridges: Volcanic stratigraphy in the Wadi Fizh area, northern Oman ophiolite2012

    • Author(s)
      Kusano, Y., Adachi, Y., Miyashita, S. and Umino, S.
    • Journal Title

      Geochem. Geophys. Geosyst

      Volume: 13 Issue: 5 Pages: 1-25

    • DOI

      10.1029/2011gc004006

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] オマーンオフィオライトをめぐる地質学的研究の現状と問題点2012

    • Author(s)
      宮下純夫・足立佳子
    • Journal Title

      月刊地球

      Volume: 34 Pages: 130-135

    • Related Report
      2012 Research-status Report 2011 Research-status Report
  • [Journal Article] Lava accretion system around mid-ocean-ridges: Volcanic stratigraphy in the Wadi Fizh area, northern Oman ophiolite2012

    • Author(s)
      Kusano, Yuki
    • Journal Title

      Geochem. Geophys. Geosys

      Volume: 13

    • Related Report
      2011 Research-status Report
    • Peer Reviewed
  • [Presentation] Partial Melting and Assimilation of the Roof of Melt Lens, and New Perspectives of Hydrothermal Systems Beneath Fast-Spread Ocean Ridges.2014

    • Author(s)
      Miyashita, S. and Adachi, Y.
    • Organizer
      AGU Fall Meeting
    • Place of Presentation
      Moscone Center, San Francisco, USA
    • Year and Date
      2014-12-15 – 2014-12-19
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Magmatic diversity of the wehrlitic intrusions in the oceanic lower crust of the northern part of the Oman ophiolite.2014

    • Author(s)
      R. Kaneko, Y. Adachi and S. Miyashita
    • Organizer
      AGU Fall Meeting
    • Place of Presentation
      Moscone Center, San Francisco, USA
    • Year and Date
      2014-12-15 – 2014-12-19
    • Related Report
      2014 Annual Research Report
  • [Presentation] The development of subduction below the Oman-UAE ophiolite: Detailed temporal constraints from high precision U-Pb zircon geochronology2014

    • Author(s)
      M. Rioux, S. Bowring, J. Garber, P. Kelemen, M. Searle, S. Miyashita, Y. Adachi
    • Organizer
      AGU Fall Meeting
    • Place of Presentation
      Moscone Center, San Francisco, USA
    • Year and Date
      2014-12-15 – 2014-12-19
    • Related Report
      2014 Annual Research Report
  • [Presentation] 超変成作用によるピジョン輝石の出現と消滅:マグマ溜まりルーフにおける部分溶融と同化作用2014

    • Author(s)
      宮下純夫・足立佳子
    • Organizer
      日本地質学会第121年学術大会
    • Place of Presentation
      鹿児島大学,鹿児島市
    • Year and Date
      2014-09-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] ポロシリオフィオライトの変斑れい岩類の温度圧力経路ー角閃石と緑泥石の形成プロセスからの検討ー2014

    • Author(s)
      田中真二・宮下純夫
    • Organizer
      日本地質学会第121年学術大会
    • Place of Presentation
      鹿児島大学,鹿児島市
    • Year and Date
      2014-09-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] オマーンオフィオライト北部のシート状岩脈群-上部斑れい岩境界部付近に分布する斑れい岩の岩石学的特徴とその成因2014

    • Author(s)
      金子龍, 足立佳子, 宮下純夫
    • Organizer
      日本地質学会第121年学術大会
    • Place of Presentation
      鹿児島大学,鹿児島市
    • Year and Date
      2014-09-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] 高温沈み込み帯の進化過程-オマーンオフィオライトの例-2014

    • Author(s)
      草野有紀・北村啓太朗・海野進・足立佳子・宮下純夫・永石一哉・石川剛志
    • Organizer
      日本地質学会第121年学術大会
    • Place of Presentation
      鹿児島大学,鹿児島市
    • Year and Date
      2014-09-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] 「高温沈み込み帯」のマグマ進化過程2014

    • Author(s)
      草野有紀・北村啓太朗・足立佳子・新城竜一・海野進・宮下純夫
    • Organizer
      日本地球惑星科学連合
    • Place of Presentation
      横浜パシフィコ.横浜市
    • Year and Date
      2014-04-28 – 2014-05-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] オマーンオフィオライト地殻セクション中に分布する超苦鉄質岩体の多様性2014

    • Author(s)
      金子龍, 足立佳子, 宮下純夫
    • Organizer
      日本地球惑星科学連合
    • Place of Presentation
      横浜パシフィコ.横浜市
    • Year and Date
      2014-04-28 – 2014-05-02
    • Related Report
      2014 Annual Research Report
  • [Presentation] Magma system along fast-spreading ridges: Evidence from the northern Oman Ophiolite2013

    • Author(s)
      S. Miyashita, Y. Adachi,Y. Nogawa, R. Kaneko, T. Tomatsu, T. Hashimoyo
    • Organizer
      JpGU Meeting 2013
    • Place of Presentation
      Makuhari Messe
    • Related Report
      2013 Research-status Report
  • [Presentation] Petrology and petrogenesis of felsic rocks in the Oman ophiolite, Oman2013

    • Author(s)
      N. Tsuchiya, K. Nakamura,T. Umetsu, J. Sasaki, Y. Adachi, S. Miyashita
    • Organizer
      JpGU Meeting 2013
    • Place of Presentation
      Makuhari Messe
    • Related Report
      2013 Research-status Report
  • [Presentation] Petrological and structural examination of the origin of foliated gabbros in the Oman ophiolite2013

    • Author(s)
      M. Oikawa, Y. Adachi, Y. Nogawa, S. Miyashita
    • Organizer
      JpGU Meeting 2013
    • Place of Presentation
      Makuhari Messe
    • Related Report
      2013 Research-status Report
  • [Presentation] Along-axis variations of a fast-spreading mid-ocean ridge: implication from the volcanic rocks in the Oman ophiolite2013

    • Author(s)
      Y. Kusano, Y. Adachi, S. Umino, S. Miyashita
    • Organizer
      JpGU Meeting 2013
    • Place of Presentation
      Makuhari Messe
    • Related Report
      2013 Research-status Report
  • [Presentation] Evolution of volcanism and magmatism during initial arc stage of the Oman ophiolite2013

    • Author(s)
      Y. Kusano, Y. Adachi, S. Umino, S. Miyashita,
    • Organizer
      IAVCEI 2013
    • Place of Presentation
      鹿児島
    • Related Report
      2013 Research-status Report
  • [Presentation] Formation of oceanic crust as viewed from the Oman ophiolite and deep ocean-floor drilling2013

    • Author(s)
      S. Miyashita, Y. Adachi, Y. Nogawa
    • Organizer
      日本地質学会第120年学術大会
    • Place of Presentation
      東北大学(仙台)
    • Related Report
      2013 Research-status Report
  • [Presentation] Magma system along fast-spreading ridges controlled by segmentation: Evidence from the northern Oman ophiolite2013

    • Author(s)
      S. Miyashita, Y. Adachi
    • Organizer
      EGU General Assembly 2013
    • Place of Presentation
      Vienna, Austria
    • Related Report
      2013 Research-status Report
  • [Presentation] Hole 1256Dのシート状岩脈群基底部での部分溶融と同化作用2013

    • Author(s)
      足立佳子, 宮下純夫, Exp. 335 Science Parties
    • Organizer
      日本地球惑星科学連合2013年大会
    • Place of Presentation
      幕張メッセ
    • Related Report
      2013 Research-status Report
  • [Presentation] オマーンオフィオライト北部に分布する超苦鉄質ブロックの岩石学的特徴:オフィオライト形成史の新知見2013

    • Author(s)
      金子龍, 足立佳子, 宮下純夫
    • Organizer
      日本地質学会第120年学術大会
    • Place of Presentation
      東北大学(仙台)
    • Related Report
      2013 Research-status Report
  • [Presentation] オマーンオフィオライトフォリエイテッド斑レイ岩の成因2013

    • Author(s)
      及川真宏, 足立佳子, 野川裕, 豊島剛志, 宮下純夫
    • Organizer
      日本地質学会第120年学術大会
    • Place of Presentation
      東北大学(仙台)
    • Related Report
      2013 Research-status Report
  • [Presentation] ポロシリオフィオライトの変成プロセスと日高変成帯の熱史とテクトニクスとの関連2013

    • Author(s)
      田中真二, 宮下純夫
    • Organizer
      日本地質学会第120年学術大会
    • Place of Presentation
      東北大学(仙台)
    • Related Report
      2013 Research-status Report
  • [Presentation] 初期島弧火成活動の火山岩層序解析:オマーンオフィオライトの例2013

    • Author(s)
      草野有紀, 林舞香, 足立佳子, 海野進, 宮下純夫
    • Organizer
      日本地質学会第120年学術大会
    • Place of Presentation
      東北大学(仙台)
    • Related Report
      2013 Research-status Report
  • [Presentation] 無人岩に先行する初期島弧火成活動の地質学的検討2013

    • Author(s)
      草野有紀, 足立佳子, 海野進, 宮下純夫
    • Organizer
      日本火山学会2013年度秋季大会
    • Place of Presentation
      猪苗代町体験交流館
    • Related Report
      2013 Research-status Report
  • [Presentation] 一時的島弧”のマグマ進化過程2013

    • Author(s)
      草野有紀, 伊計杏, 足立佳子, 新城竜一, 海野進, 宮下純夫
    • Organizer
      2013年度秋季大会
    • Place of Presentation
      猪苗代町体験交流館
    • Related Report
      2013 Research-status Report
  • [Presentation] Magmatic system along fast-spreading ridges controlled by segmentation: Evidence from the northern Oman ophiolite2013

    • Author(s)
      Sumio Miyashita and Yoshiko Adachi.
    • Organizer
      EGU-2013 Assembly
    • Place of Presentation
      Vienna, Austria
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] Lava accretion processes around mid-ocean-ridges: Volcanic stratigraphy in the Wadi Fizh area, northern Oman ophiolite2012

    • Author(s)
      Kusano, Y., Adachi, Y., Miyashita, S. and Umino, S.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      Muscat, Oman
    • Related Report
      2012 Research-status Report
  • [Presentation] Magma system along fast-spreading ridges: Evidence from the upper gabbro units in the northern Oman Ophiolite2012

    • Author(s)
      Miyashita, S., Nogawa, Y., Adachi, Y. and Tomatsu, T.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      Muscat, Oman
    • Related Report
      2012 Research-status Report
  • [Presentation] Petrogenesis of regional variation of the Moho transition zone in the northern Oman ophiolite2012

    • Author(s)
      Adachi, Y., Hashimoto, T., Miyashita, S.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      Muscat, Oman
    • Related Report
      2012 Research-status Report
  • [Presentation] Formation of incipient oceanic island arc crust within oceanic crustal sequence: Geology and geochemistry of the late intrusive rocks in the northern Oman ophiolite2012

    • Author(s)
      Yamazaki, S. and Miyashita, S.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      Muscat, Oman
    • Related Report
      2012 Research-status Report
  • [Presentation] Formation of incipient oceanic island arc crust within oceanic crustal sequence: Geology and geochemistry of the late intrusive rocks in the northern Oman ophiolit2012

    • Author(s)
      Yamazaki, S.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      マスカット(オマーン)
    • Related Report
      2011 Research-status Report
  • [Presentation] Lava accretion processes around mid-ocean-ridges: Volcanic stratigraphy in the Wadi Fizh area, northern Oman ophiolite2012

    • Author(s)
      Kusano, Y.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      マスカット(オマーン)
    • Related Report
      2011 Research-status Report
  • [Presentation] Magma system along fast-spreading ridges: Evidence from the upper gabbro units in the northern Oman Ophiolite2012

    • Author(s)
      Miyashita, S.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      マスカット(オマーン)
    • Related Report
      2011 Research-status Report
  • [Presentation] Petrogenesis of regional variation of the Moho transition zone in the northern Oman ophiolite2012

    • Author(s)
      Adachi, Y.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      マスカット(オマーン)
    • Related Report
      2011 Research-status Report
  • [Presentation] Petrogenesis of the Lasail plutonic complex, northern Oman ophiolite, Oman2012

    • Author(s)
      Tsuchiya, N.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      マスカット(オマーン)
    • Related Report
      2011 Research-status Report
  • [Presentation] Along-axis variations of "wehrlite" intrusions in the northern Oman ophiolite2012

    • Author(s)
      Kaneko, R.
    • Organizer
      International Conference on the Geology of the Arabian Plate and the Oman Mountains
    • Place of Presentation
      マスカット(オマーン)
    • Related Report
      2011 Research-status Report
  • [Presentation] オマーンオフィオライト北部における大規模ウェールライト岩体の発見2011

    • Author(s)
      金子 龍
    • Organizer
      日本地質学会第118年学術大会
    • Place of Presentation
      水戸
    • Related Report
      2011 Research-status Report
  • [Presentation] 海嶺セグメント内部における溶岩層の系統的変化 オマーンオフィオライトの例2011

    • Author(s)
      草野 有紀
    • Organizer
      日本地質学会第118年学術大会
    • Place of Presentation
      水戸
    • Related Report
      2011 Research-status Report
  • [Presentation] オマーンオフィオライト北部,ラセイル深成岩体の結晶作用2011

    • Author(s)
      土谷 信高
    • Organizer
      日本地質学会第118年学術大会
    • Place of Presentation
      水戸
    • Related Report
      2011 Research-status Report
  • [Presentation] オマーンオフィオライト中の海嶺期および衝上開始期の珪長質岩の特徴とその成因2011

    • Author(s)
      土谷信高
    • Organizer
      日本地球惑星科学連合学会2011年大会
    • Place of Presentation
      幕張
    • Related Report
      2011 Research-status Report
  • [Presentation] 北部日高帯下川岩体における現地性緑色岩の起源と発泡現象の検討2011

    • Author(s)
      加藤聡美
    • Organizer
      日本地質学会第118年学術大会
    • Place of Presentation
      水戸
    • Related Report
      2011 Research-status Report
  • [Presentation] 海洋性島弧地殻の初期形成プロセス:オマーンオフィオライトにおける後期貫入岩体類の地球化学2011

    • Author(s)
      山崎秀策
    • Organizer
      日本地質学会第118年学術大会
    • Place of Presentation
      水戸
    • Related Report
      2011 Research-status Report
  • [Presentation] Petrology of the Lasail plutonic complex, northern Oman Ophiolite, Oman2011

    • Author(s)
      Tsuchiya, N.
    • Organizer
      VII Hutton Symposium on Granites and Related Rocks
    • Place of Presentation
      Avila, Spain
    • Related Report
      2011 Research-status Report
  • [Remarks] 宮下研究室ホームページ

    • URL

      http://geo.sc.niigata-u.ac.jp/~miyashit/

    • Related Report
      2013 Research-status Report

URL: 

Published: 2011-08-05   Modified: 2019-07-29  

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