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Development of the technique for the measurements of elastic wave velocity in supercritical fluids using externally-heated diamond-anvil cell

Research Project

Project/Area Number 16K13874
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Solid earth and planetary physics
Research InstitutionThe University of Tokyo

Principal Investigator

Mibe Kenji  東京大学, 地震研究所, 助教 (10372426)

Research Collaborator KONO Yoshio  
Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords高温高圧 / 弾性波速度 / 地震波速度 / P波速度 / マグマ / メルト / 超臨界流体 / 炭酸塩 / フルイド / 炭酸塩メルト / リソスフェア / ダイヤモンドアンビル / 水 / 流体 / 超音波
Outline of Final Research Achievements

In order to understand the velocity of seismic waves in the Earth’s interior, the experimental methods for the determination of elastic wave velocities in 100% fluid samples were newly developed. Three types of high-pressure and high-temperature apparatus, externally-heated diamond-anvil cell, Kawai-type multi-anvil, and Paris-Edinburgh cell, was used. The ultrasonic wave signals were generated using LiNbO3 transducer, and were used to determine the travel time through the molten samples. Using those techniques, the P-wave velocities in carbonate melts were successfully determined under high-pressure and high-temperature conditions. The obtained data will be useful in understanding the origin of the low-velocity zone which is often observed in Earth’s upper mantle. Using the techniques developed in this study, it is expected that the relationship between the elastic wave velocity and the properties of fluids would be clarified in the near future.

Report

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

    (1 results)

All 2017

All Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Sound velocity of carbonate melts under high pressure and temperature conditions and the origin of mid-lithosphere discontinuity2017

    • Author(s)
      K. Mibe and Y. Kono
    • Organizer
      11th International Kimberlite Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2019-03-29  

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