2012 Fiscal Year Final Research Report
Constrain on elastic properties at high P and T of the minerals of the Earth's MTZ
| Project/Area Number |
23740339
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Ehime University |
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Principal Investigator |
GREAUX Steeve 愛媛大学, 地球深部ダイナミクス研究センター, グローバル COE 助教 (90543166)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 内部構造 |
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| Research Abstract |
The P- and S-wave velocities of mantle transition zone minerals were investigated by ultrasonic interferometry in situat simultaneous high pressure and high temperature relevant to the Earth’s deep mantle. The direct comparison of our laboratory experiments with seismic observations gives an original insight into the structure of the Earth’s deep mantle. Our results showed that chemical variation in garnet can hardly explain low velocity regions, which suggest that multiple phase transformation and/or transition could be responsible for splitting of seismic waves near the 660 km depth discontinuity.
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