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Development of zircon pre-crystallization magma resident time dating for investigation of high-temperature magma processes

Research Project

Project/Area Number 18K13636
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionThe University of Tokyo (2019-2021)
Gakushuin University (2018)

Principal Investigator

Sakata Shuhei  東京大学, 地震研究所, 助教 (20772255)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsマグマの上昇速度 / ジルコン / 放射年代学 / 地球化学 / 部分溶融 / ウラン系列 / トリウム系列 / 微量元素組成 / 非平衡年代測定法 / 高温マグマプロセス / ウラン系列非平衡年代測定
Outline of Final Research Achievements

The mineral zircon, which is found in magma-solidified rocks observed on the earth's surface. Zircon can be dated using isotopes of uranium, thorium, and lead to determine the time from its crystallization to the present. In this study, we took the conventional method one step further and developed a method to quantify the time before the mineral crystallization by combining the age calculated from thorium-lead pairs and the age obtained from uranium and lead. This method is expected to allow us to determine the time from when magma generated deep underground rises to the surface to when minerals are formed along the way.

Academic Significance and Societal Importance of the Research Achievements

日本は世界有数の火山大国であり、火山噴火のメカニズムを明らかにすることは学術的にも防災の観点からも重要である。しかし、火山地下のマグマ溜まりよりさらに下部、すなわち「火山の根」がどうなっているのかについては未だ不明な点が多い。本研究は火山の根においてマグマが上昇するスピードの履歴を鉱物に保存される情報から読み取ろうとするもので、火山の地下でのマグマの動きに関する直接的な証拠を提供すると期待される。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (1 results)

All 2018

All Presentation (1 results)

  • [Presentation] 高温マグマプロセス解明に向けたジルコンウラン系列年代測定法の再編2018

    • Author(s)
      坂田周平
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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