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Mineral inclusions study on early Earth: magnetism, tectonics and magma genesis

Research Project

Project/Area Number 26302004
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section海外学術
Research Field Solid earth and planetary physics
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

USUI Yoichi  国立研究開発法人海洋研究開発機構, 地球深部ダイナミクス研究分野, 研究員 (20609862)

Co-Investigator(Kenkyū-buntansha) 谷 健一郎  独立行政法人国立科学博物館, 地学研究部, 研究員 (70359206)
Co-Investigator(Renkei-kenkyūsha) SHIBUYA Takazo  国立研究開発法人海洋研究開発機構, 深海・地殻内生物圏研究分野, 研究員 (00512906)
Research Collaborator SAITOH Masafumi  
NISHIZAWA Manabu  
KASHIWABARA Teruhiko  
OKUMURA Tomoyo  
SATO Honami  
KATO Chie  
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords古地磁気 / 離溶磁鉄鉱 / 太古代 / ピルバラクラトン / ジルコン / 古地磁気学 / デイサイト / 花崗岩 / ピルバラ / 地質学 / 地球電磁気 / 地殻・マントル物質 / 惑星起源・進化 / チャート / 古地磁気強度 / 結晶方位
Outline of Final Research Achievements

We conducted field study around the town Marble Bar in the Pilbara craton, Western Australia. We discovered the near-single domain exsolved magnetite in plagioclase in ca. 3.3 Ga granitoid. We quantify the magnetic anisotropy and remanence acquisition efficiency of the exsolved magnetite. We also measure ca. 3.5 Ga red dacite near Glen Herring Gorge. In contrast to the previous results, we argue that the potentially primary remanence should be restricted to the blocking temperature above 400 C.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • Research Products

    (6 results)

All 2017 2016 2015

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (3 results)

  • [Journal Article] Paleomagnetic directional groups and paleointensity from the flood basalt in the Tarim large igneous province: implications for eruption frequency2017

    • Author(s)
      Usui, Y., Tian, W.
    • Journal Title

      Earth Planets Space

      Volume: 69 Issue: 1 Pages: 1-14

    • DOI

      10.1186/s40623-016-0595-x

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pliocene granodioritic knoll with continental crust affinities discovered in the intra-oceanic Izu-Bonin-Mariana Arc: Syntectonic granitic crust formation during back-arc rifting2015

    • Author(s)
      K. Tani, D.J. Dunkley, Q. Chang, A.R.L. Nichols, H. Shukuno, Y. Hirahara, O. Ishizuka, M. Arima, Y. Tatsumi
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 424 Pages: 84-94

    • DOI

      10.1016/j.epsl.2015.05.019

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Rock magnetism of tiny exsolved magnetite in plagioclase from a Paleoarchean granitoid in the Pilbara craton2015

    • Author(s)
      Yoichi Usui, Takazo Shibuya, Yusuke Sawaki, Tsuyoshi Komiya
    • Journal Title

      Geochem. Geophys. Geosyst.

      Volume: 16 Issue: 1 Pages: 112-125

    • DOI

      10.1002/2014gc005508

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Presentation] ピルバラクラトンの34.6億年前のデイサイトにおける古地磁気フィールドテストの再検討2016

    • Author(s)
      臼井洋一、西澤学、斎藤誠史、谷健一郎、渋谷岳造、奥村知世
    • Organizer
      日本地球惑星連合2016年大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2016-05-24
    • Related Report
      2016 Annual Research Report
  • [Presentation] ピルバラクラトンの34.6億年前のデイサイトにおける古地磁気フィールドテストの再検討2016

    • Author(s)
      臼井洋一、西澤学、斎藤誠史、谷健一郎、柏原輝彦、奥村知世
    • Organizer
      日本地球惑星科学連合連合大会2016年大会
    • Place of Presentation
      幕張メッセ、千葉県千葉市
    • Year and Date
      2016-05-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] 西オーストラリア、ピルバラ地域の古始生代岩石に対する古地磁気フィールドテスト2015

    • Author(s)
      臼井洋一、渋谷岳造、谷健一郎、斉藤誠史、西沢学、柏原輝彦
    • Organizer
      日本地球惑星科学連合連合大会2015年大会
    • Place of Presentation
      幕張メッセ(千葉県、千葉市)
    • Year and Date
      2015-05-25
    • Related Report
      2014 Annual Research Report

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Published: 2014-04-04   Modified: 2018-03-22  

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