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Reconstruction of garnet-clinopyroxene geothermometer

Research Project

Project/Area Number 16K05610
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

Nakamura Daisuke  岡山大学, 自然科学研究科, 准教授 (50378577)

Co-Investigator(Kenkyū-buntansha) 平島 崇男  京都大学, 理学研究科, 教授 (90181156)
Research Collaborator FUJISE takeru  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords変成岩 / エクロジャイト / 地質温度計 / ザクロ石 / 単斜輝石 / 温度圧力推定 / 温度圧力履歴 / 岩石・鉱物・鉱床学 / 地殻・マントル物質
Outline of Final Research Achievements

In continent collision zones, rocks which have subducted into pressures of 3 GPa or more (100 km depth or more below the surface) are widely exposed on the surface. It is a major task to clarify phenomena occurring in such continent collision zones. For that purpose, it is important to estimate precisely pressure-temperature (P-T) conditions which the rocks have reached. Garnet-clinopyroxene thermometer is one method for such estimation, but thermodynamic properties of clinopyroxene are not yet well known. Thereby, we aimed to construct more accurate thermometer by analyses of natural rocks and statistical processing of experimental data. At the same time, we revealed that some rocks occurring in eastern China reached P-T conditions of about 800 °C, 5 GPa by analyses of them.

Academic Significance and Societal Importance of the Research Achievements

本研究でより高精度な温度計の構築を目指したが、天然物質からのデータと実験データが互いに反駁する結果を与え、最終的な構築には至っていない。一方、既存の地質温度圧力計と近年の熱力学的モデリング手法を上記した中国の岩石へ適用した結果、両者とも約800℃、5 GPaの条件を与えた。このことは少なくとも今回分析した岩石が地下150km以深まで沈み込み、再び地表まで上昇してきたことを表している。プレート収斂帯において厚くて軽い地殻は沈みにくいと考えられるが、そのような地殻でも地下深部まで沈み込み得ることを意味している。こうした地殻変動のプロセスの解明は大規模地震発生のメカニズム解明にもつながる研究である。

Report

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

    (10 results)

All 2018 2017 2016

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (8 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Amphibole in UHP eclogite from the Sulu region, eastern China2018

    • Author(s)
      Yamasaki, S., Nakamura, D. & Hirajima, T.,
    • Journal Title

      Journal of Mineralogical and Petrological Sciences

      Volume: 113 Issue: 3 Pages: 135-151

    • DOI

      10.2465/jmps.170420

    • NAID

      130007403333

    • ISSN
      1345-6296, 1349-3825
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evidence for partial melting of eclogite from the Moldanubian Zone of the Bohemian Massif, Czech Republic2016

    • Author(s)
      MIYAZAKI, TAKAHIRO, NAKAMURA, D., AKIHIRO TAMURA, MARTIN SVOJTKA, SHOJI ARAI and TAKAO HIRAJIMA
    • Journal Title

      Journal of Mineralogical and Petrological Sciences

      Volume: 111 Issue: 6 Pages: 405-419

    • DOI

      10.2465/jmps.151029c

    • NAID

      130005286413

    • ISSN
      1345-6296, 1349-3825
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] 中国東部大別山地域Bixiling複合岩体の温度圧力履歴2018

    • Author(s)
      藤瀬 武尊・中村 大輔・平島 崇男
    • Organizer
      日本地質学会第125年学術大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Origin of mm-scale layering structure in an ultra-high pressure eclogite from Nové Dvory, Moldanubian Zone of the Bohemian Massif2017

    • Author(s)
      A. Yasumoto, T. Hirajima, D. Nakamura, & M. Svojtka
    • Organizer
      12th International Eclogite Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] モンゴル国・湖水地域の超高圧エクロジャイト2017

    • Author(s)
      苗村康輔・オトコンコ ジャフハラン・中村大輔
    • Organizer
      日本鉱物科学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 中国東部蘇魯地域・栄成地区に産するエクロジャイトとザクロ石カンラン岩の推定圧力ギャップ2017

    • Author(s)
      山根創・中村大輔・平島崇男
    • Organizer
      日本鉱物科学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 低温超高圧エクロジャイト中のH2O含有量2017

    • Author(s)
      藤瀬武尊・中村大輔・平島崇男
    • Organizer
      日本地質学会第124年学術大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 大別山地域に産する低温超高圧エクロジャイト2016

    • Author(s)
      藤瀬武尊・中村大輔・平島崇男
    • Organizer
      日本鉱物科学会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-23
    • Related Report
      2016 Research-status Report
  • [Presentation] 中国東部Su-Lu地域の超高圧エクロジャイト中の角閃石の安定性2016

    • Author(s)
      山崎聡・中村大輔・平島崇男
    • Organizer
      日本鉱物科学会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-23
    • Related Report
      2016 Research-status Report
  • [Presentation] ボヘミア山塊Moldanubian帯Nove Dvory産エクロジャイトの単一露頭における多様なザクロ石組成累帯構造の解読2016

    • Author(s)
      安本篤史・平島崇男・中村大輔
    • Organizer
      日本鉱物科学会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-23
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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