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Hydrothermal alteration in lower crustal rocks from Atlantis Bank, Southwest Indian Ridge

Research Project

Project/Area Number 16K05611
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Petrology/Mineralogy/Economic geology
Research InstitutionOkayama University

Principal Investigator

Nozaka Toshio  岡山大学, 自然科学研究科, 准教授 (80252948)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords海洋リソスフェア / 下部地殻 / 斑れい岩 / 変質作用 / アトランティス・バンク / 海洋底 / 斑レイ岩 / 岩石・鉱物・鉱床学 / 地殻・マントル物質
Outline of Final Research Achievements

Biotite was found in drill cores of lower oceanic crustal gabbros recovered from Atlantis Bank, SW Indian Ridge. This is the first discovery of such an alkali-rich mineral from the lower oceanic crust. Detailed petrological analyses have revealed that the biotite was formed by reactions of primary olivine and plagioclase with Si- and K-rich aqueous fluids derived from differentiated melts. This finding suggests widespread chemical modification of the lower oceanic crust and provides significant implications for the global-scale geochemical cycle.
In addition, serpentinization conditions in gabbroic rocks from Hess Deep Rift near the East Pacific Rise and in peridotites from the Oeyama ophiolite, Southwest Japan were analyzed and compared with that of the Atlantis Bank gabbros. From these studies, it has been revealed that the physico-chemical conditions of low-temperature alteration of the oceanic lithosphere are variable between localities and between lithologies.

Academic Significance and Societal Importance of the Research Achievements

海洋下部地殻を構成する斑れい岩は火成作用による分化の程度が小さく,一般にアルカリ元素に乏しい。海洋下部地殻中に黒雲母のようなアルカリに富む鉱物が産出することは,世界で初めての発見である。これは海洋下部地殻が形成後に広範囲にわたって流体による化学的改変を受けている可能性を示唆するものである。また海洋リソスフェアの高温ならびに低温変質作用は,地域間あるいは岩相間で差異があることが明らかになった。これらのことはグローバルな物質循環および地球環境の変遷のプロセスを理解する上で重要な新知見である。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (29 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (7 results) Journal Article (8 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 5 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (14 results) (of which Int'l Joint Research: 10 results)

  • [Int'l Joint Research] パビア大学(イタリア)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Indiana University/Woods Hole Oceanographic Institution/Texas A&M University(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] German Research Center for Geosciences/University of Hannover(Germany)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Cardiff University/University of Plymouth(英国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] University of Montpellier/University of Lorraine(France)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] University of Pavia(Italy)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2016 Research-status Report
  • [Journal Article] Biotite in olivine gabbros from Atlantis Bank: Evidence for amphibolite-facies metasomatic alteration of the lower oceanic crust2019

    • Author(s)
      Nozaka Toshio、Akitou Tetsu、Abe Natsue、Tribuzio Riccardo
    • Journal Title

      Lithos

      Volume: 348-349 Pages: 105176-105176

    • DOI

      10.1016/j.lithos.2019.105176

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dynamic Accretion Beneath a Slow‐Spreading Ridge Segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core Complex2019

    • Author(s)
      Dick H. J. B.、MacLeod C. J.、Blum P.、Abe N.、Blackman D. K.、Bowles J. A.、Cheadle M. J.、Cho K.、Ciazela J.、Deans J. R.、Edgcomb V. P.、Ferrando C.、France L.、Ghosh B.、Ildefonse B.、John B.、Kendrick M. A.、Koepke J.、Leong J. A. M.、Liu C.、Ma Q.、Morishita T.、ほか9名
    • Journal Title

      Journal of Geophysical Research: Solid Earth

      Volume: 124 Issue: 12 Pages: 12631-12659

    • DOI

      10.1029/2018jb016858

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Compositional variation of olivine related to high–temperature serpentinization of peridotites: Evidence from the Oeyama ophiolite2018

    • Author(s)
      Nozaka, T.
    • Journal Title

      Journal of Mineralogical and Petrological Sciences

      Volume: 113 Issue: 5 Pages: 219-231

    • DOI

      10.2465/jmps.180420

    • NAID

      130007506101

    • ISSN
      1345-6296, 1349-3825
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Serpentinization of olivine in troctolites and olivine gabbros from the Hess Deep Rift2017

    • Author(s)
      Nozaka, T., Wintsch, R.P. and Meyer, R.
    • Journal Title

      Lithos

      Volume: 282-283 Pages: 201-214

    • DOI

      10.1016/j.lithos.2016.12.032

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Southwest Indian Ridge Lower Crust and Moho2017

    • Author(s)
      MacLeod, C.J., Dick, H.J.B., Blum, P., and the Expedition 360 Scientists
    • Journal Title

      Proceedings of the International Ocean Discovery Program

      Volume: 360

    • DOI

      10.14379/iodp.proc.360.2017

    • Related Report
      2017 Research-status Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Hydrothermal spinel, corundum and diaspore in lower oceanic crustal troctolites from the Hess Deep Rift2016

    • Author(s)
      Nozaka, T., Meyer, R., Wintsch, R.P. and Wathen, B.
    • Journal Title

      Contributions to Mineralogy and Petrology

      Volume: 171 Issue: 6 Pages: 1-14

    • DOI

      10.1007/s00410-016-1266-4

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Southwest Indian Ridge Lower Crust and Moho: The nature of the lower crust and Moho at slower spreading ridges (SloMo Leg 1)2016

    • Author(s)
      Dick, H.J.B., MacLeod, C.J., Blum, P. and the Expedition 360 Scientists
    • Journal Title

      International Ocean Discovery Program Expedition 360 Preliminary Report

      Volume: - Pages: 1-50

    • DOI

      10.14379/iodp.pr.360.2016

    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Journal Article] IODP Expedition 360: first stage of drilling into Earth’s Mantle2016

    • Author(s)
      Jakub Ciazela, Henry J.B. Dick, Chris MacLeod, Peter Blum, Expedition 360 Scientific Party
    • Journal Title

      Przeglad Geologiczny

      Volume: 64 Pages: 889-895

    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 南西インド洋海嶺アトランティス・バンクのかんらん石斑れい岩に産する黒雲母:角閃岩相の交代変質作用の証拠2018

    • Author(s)
      秋藤哲・野坂俊夫・阿部なつ江
    • Organizer
      日本鉱物科学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 八方超苦鉄質岩体の蛇紋岩中に産する鉄モンチセライト2018

    • Author(s)
      野坂俊夫
    • Organizer
      日本鉱物科学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 南西インド洋海嶺Atlantis Bankの斑レイ岩類中のMg-Fe雲母と変質鉱物2017

    • Author(s)
      秋藤哲・野坂俊夫
    • Organizer
      日本鉱物科学会2017年年会
    • Related Report
      2017 Research-status Report
  • [Presentation] The Age of IODP Site 1473, Atlantis Bank: Constraints from initial SIMS U-Pb dating and chemistry of zircons2016

    • Author(s)
      M.J. Cheadle, B.E. John, M.A. Coble, J. Koepke, M. Rioux & IODP Expedition 360 Scientists
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Physical properties of gabbroic rock exposed in oceanic core complexes- new borehole data from IODP Hole U1473A in the Indian Ocean and prior Mid-Atlantic Ridge results2016

    • Author(s)
      Donna Blackman, Benoit Ildefonse, Natsue Abe, Alistair Harding, Gilles Guerin and Exp360 Science Party
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Insights into oceanic core complex formation from structural studies of IODP Hole U1473A, Expedition 360 Atlantis Bank, Southwest Indian Ridge2016

    • Author(s)
      Jeremy Deans, Michael Cheadle, Oliver Pluemper, Gustavo Viegas, Carlotta Ferrando and Expedition 360 Science Party
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microbiology of the lower ocean crust - Preliminary results from IODP Expedition 360, Atlantis Bank2016

    • Author(s)
      Jason B. Sylvan, Virginia P Edgcomb, Gaetan Burgaud, Frieder Klein, Florence Schubotz and IODP 360 Expedition Scientists
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Igneous and alteration geochemistry of oceanic gabbros from the Atlantis Bank core complex, SW Indian Ridge: Preliminary (shipboard) results from IODP Hole U1473A2016

    • Author(s)
      Mark A. Kendrick, Jakub Ciazela, Kyungo Cho, Lyderic France and Exp360 Science Party
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Paleomagnetic and rock magnetic results from in-situ oceanic gabbro from Atlantis Bank: IODP Expedition 3602016

    • Author(s)
      Bowles, Morris, Tivey and Expedition 360 Scientists
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mobility of Late-stage Magmatic Liquids and the Development of Detachment Faults at a Slowly-spreading Ridge2016

    • Author(s)
      James H Natland, Michael J Cheadle, Henry J Dick, Lyderic France and Expedition 360 Scientific Party
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] IODP Exp 362T: additional coring and remediation in Hole U1473A - continuing the journey to the Moho2016

    • Author(s)
      Peter Blum, Henry Dick, Chris MacLeod and Expedition 360 Scientists
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Lateral Variability of the Lower Ocean Crust at Atlantis Bank, SW Indian Ridge, Results of IODP Expedition 3602016

    • Author(s)
      Henry J Dick, Christopher J MacLeod, Peter Blum and Expedition 360 Scientifc Party
    • Organizer
      American Geophysical Union Fall Meeting
    • Place of Presentation
      San Francisco (USA)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 高温蛇紋岩化作用に伴う鉄に富むかんらん石の生成:西南日本のオフィオライトかんらん岩体の例2016

    • Author(s)
      野坂俊夫
    • Organizer
      日本鉱物科学会2016年会
    • Place of Presentation
      金沢大学(金沢)
    • Year and Date
      2016-09-22
    • Related Report
      2016 Research-status Report
  • [Presentation] Physical properties and borehole information of Hole U1473A, IODP Exp. 360 Inditan Ridge Lower Crust and Moho (SloMo)2016

    • Author(s)
      Abe, N., Ildefonse, B.M., Blackman, D.K., Dick, H.J.B., Macleod, C., Blum, P. and IODP Exp. 360 Scientific Party
    • Organizer
      26th Goldschmidt Conference
    • Place of Presentation
      横浜国際平和会議場(横浜)
    • Year and Date
      2016-06-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2022-02-16  

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