Simultaneous in situ X-ray and ultrasonic measurements under P-T
substantial extension of the pressure range in these measurements toward the lower mantle regime can be made using harder anvil materials, such as sintered ...
Simultaneous in situ X-ray and ultrasonic measurements under P-T conditions of the mantle transition region T. IRIFUNE1, Y. HIGO1, T. INOUE1 K. FUNAKOSHI2, B. LI3 1
Geodynamics Research Center, Ehime University 2
3
JASRI, SPring-8
Mineral Physics Institute, State University of New York
We have developed techniques to perform simultaneous in situ X-ray and ultrasonic measurements of polycrystalline high-pressure phases at pressures to 18 GPa and temperatures to 1500C, using a combination of synchrotron radiation and a large-volume multianvil apparatus at SPring-8. The first attempt on (Mg0.9Fe0.1)2SiO4 ringwoodite in this direction has been highly successful, and we are currently planning to pursue precise P-V-T-Vp-Vs measurements on some major high-pressure phases in the mantle transition region. We also expect substantial extension of the pressure range in these measurements toward the lower mantle regime can be made using harder anvil materials, such as sintered polycrystalline bodies of cBN or diamond.
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