| Project/Area Number |
02402019
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
鉱物学(含岩石・鉱床学)
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| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
TAKAHASHI Eiichi FACULTY OF SCIENCE, TOKYO INSTITUTE OF TECHNOLOGY, 理学部, 助教授 (40144779)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAZAWA Kiyoshi FACULTY OF SCIENCE, TOKYO INSTITUTE OF TECHNOLOGY RESEARCH ASSOCIATE, 理学部, 教授 (10025455)
TANAKA Hidefumi FACULTY OF SCIENCE, TOKYO INSTITUTE OF TECHNOLOGY RESEARCH ASSOCIATE, 理学部, 助手 (80108191)
河野 長 東京工業大学, 理学部, 教授 (20011596)
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| Project Period (FY) |
1990 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥26,400,000 (Direct Cost: ¥26,400,000)
Fiscal Year 1993: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1992: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1991: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1990: ¥20,400,000 (Direct Cost: ¥20,400,000)
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| Keywords | high pressure / multi-anvil / Earth / planet / high pressure experiments / mantle / core / magma / 月 / 隕石 / マグマオーシャン / ペリドタイト / 高温高圧実験 / 惑星形成 / マルチアン.ビル |
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| Research Abstract |
In order to study the early history of the Earth and other planets, we have installed an uniaxial multi-anvil type high pressure apparatur (SPI-1000) at the Earth and Planetary Sciences Department, Tokyo Institute of Technol ogy using the above grant in 1991.
A very detailed experimental melting study on earth's mantle peridotite has been carried out with SPI-1000. Liqui dus and solidus curves were determined up to 17 GPa and 2300 deg. C which is equivalent ot approximately 500 km depth of the terrestrial magma ocean. This study has been highly appreci at ed from the world scientists. Invited papers were present ed at the International Geological Congress, Kyoto Autust 1992, at the Royal Society of London Special Symposium, March 1992 and at the American Geophysical Union, 1993 Fall Meting.
Melting temperature of iron metal hydride (FeH) was studied using the SPI-1000 up to 10 GPa. The metig temperatre at 5 GPa was determined to be 1200 deg. C.which is in well accordance with the insitu-X-ray observation by Fukai et al (1993). In addition, we discovered that the melting temperature lowers with increasing pressure (i.e., 800 deg. C.at 10 GPa). Our experiments imply that the temperature f the earth's cre might be much lower than revusly thught if substantial amount of FeHis incororated.
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