Research Project
Grant-in-Aid for Scientific Research (A)
We have measured unit cell volumets of the major mantle minerals, namely, olivine, wadsleyite and perovskite at high pressures and temperatures by means of in situ X-ray diffraction using a large-volume high-pressure and high-temperature apparatus installed at the synchrotron radiation facility, SPring-8. We have constructed the Mie-Grueneisen-Debye equations of state of these minerals by using the obtained data. In this procedure, we have used the bulk modulus, its pressure derivative and Debye temperature from the literatures, and estimated Grueneisen parameter gamma0 and its logarithmic volume dependence q. The estimated parameters are as follows: gamma0 = 1.40(1) and q = 2.2(1) for olivine, gamma0 =1.64(1) and q = 1.5(1) for wadsleyite. Gamma0 = 2.66(2) and q = 1.9(1) for perovskite. We have estimated thermal expansion coefficient of the major mantle minerals in the Earth's mantle using these parameters and those given by Katsura, et. Al. (2004). By assuming the adiabatic temperature gradient, the thermal expansion coefficient of olivine largely decreases with depth to 2.6 x 10(-5) /K at the 410-km depth. The thermal expansion coefficient increases associated with the olivine-wadsleyite-ringwoodite-perovskite transitions and decreasing with depth. As a result, the thermal expansion coefficient is nearly constant in the upper part of the mantle. The behavior of the adiabatic gradient is similar, and is nearly constant, that is, 0.4 K/km at the upper part of the mantle.
All 2008 2007 2006 2005 Other
All Journal Article (67 results) (of which Peer Reviewed: 29 results) Presentation (79 results) Remarks (2 results)
Contribution to Mineralogy and Petrology 155
Pages: 19-32
Nature 451
Pages: 326-329
Nature 451 (7175)
The Geological Society America Special Paper 421
Pages: 189-205
American Mineralogists 92
Pages: 1744-1749
Earth, Planets and Space 59
Pages: 645-648
Tectonophysics 434
Pages: 93-101
Solid State Commun 144
Pages: 475-477
Phys. Chem. Mineral 34
Pages: 249-255
Pages: 257-267
Earth Planet. Sci. Lett 262
Pages: 620-634
Chinese Science Bulletin 52
Pages: 1600-1606
Pages: 269-273
Japanese Journal of Applied Physics 46
Pages: 7898-7903
Phys. Chem. Mineral 34 (4)
210000063689
Physics and Chemistry of Minerals 34
J. Physics: Condensed Matter 18
Phys. Earth Planet. Inter 155
Pages: 87-95
Journal of Mineralogical and Petrological Sciences 101
Pages: 118-121
10016975573
Eur. J. Mineral 18
Pages: 523-528
Am. Miner 91
Pages: 850-861
Earth Planet. Sci. Lett 252
Pages: 372-378
Nature 443
Pages: 973-976
Phys. Rev. B: Condens. Matter 73
Pages: 134104-134104
J. Physics : Condensed Matter 18
Pages: 979-994
Journal of Mineralogical and Petrological Sciences 101 (3)
Pages: 372-37
Phys. Rev. B : Condens. Matter 73
Eur. J. Mineral. 18
Rev. High Pressure Sci. Technol 15
Pages: 9-14
10014500945
Phys. Earth Planet. Inter 148
Pages: 353-359
Rev. Sci. Instrum 76
Pages: 33906-33906
J. Appl. Phys 97
Pages: 54901-54901
Pages: 24908-24908
Advances in High-Pressure Technology for Geophysical Applications
Pages: 451-460
Eur.J.Mineral. 17
Pages: 261-267
Physics of Earth Planetary Interiors 148
Earth, Planets and Space 印刷中
Tectonophys 印刷中
Phys. Chem. Mineral. 印刷中
Physical Review B (印刷中)
GSA Memoir "Advance in High Pressure Mineralogy" (印刷中)
Encyclopedia of Geomagnetism and Paleomagnetism (印刷中)
http://www.misasa.okayama-u.ac.jp/~hacto/top_j.html