News

The 5^th Young Earth Scientists Association (YESA) Workshop was held on 9/6-7

Invited, Plenary and Keynote presentations

Tsuchiya, T., Ab initio lower mantle model, Harvard University, Boston, USA, December 11, 2012

Irifune, T., Arimoto, T., Ohfuji, H., Shinmei, T., Making gem-quality polycrystalline high-pressure minerals (poly-gems) for sound velocity measurements, AGU Fall Meeting 2012, San Francisco, December 6, 2012

Tsuchiya, T., Dekura, H., Tsuchiya, J., Ab initio thermal conductivity model of the earth's lower mantle, AGU Fall Meeting 2012, San Francisco, December 7, 2012

Sakai, T., Takahashi, S., Nishitani, N., Mashino, I., Ohtani, E., Hirao, N., Equation of state of Fe and Fe-Ni alloy at multi-megabar, AGU Fall Meeting 2012, San Francisco, December 3, 2012

Sakai, T., Phase stability and equation of state of Fe-Ni-X at Multi Mbar pressures, CECAM workshop “New insights on metals under extreme conditions”, Institut Henri Poincaré, Paris, France, December 13, 2012

Papers recently published

Kurio, A., Tanaka, Y., Sumiya, H., Irifune, T., Shinmei, T., Ohfuji, H., Kagi, H. (2012): Wear resistance of nano-polycrystalline diamond with various hexagonal diamond contents. J. of Superhard Mater., 34(6), 343-349. doi:10.3103/S1063457612060081[LINK]

Kameyama, M., Ichikawa, H., Miyauchi, A.(2013): A Linear Stability Analysis on the Onset of Thermal Convection of a Fluid with Strongly Temperature-dependent Viscosity in a Spherical Shell, Theor. Comput. Fluid. Dyn. 27, 21-40, doi: 10.1007/s00162-011-0250-x[LINK]

Kawazoe, T., Ohuchi, T., Nishihara, Y., Nishiyama, N., Fujino, K., Irifune, T. (2013): Seismic anisotropy in the mantle transition zone induced by shear deformation of wadsleyite, Phys. Earth Planet. Inter., 216, 91-98, doi:10.1016/j.pepi.2012.12.005[LINK]

Shiro, K., Yamada, I., Ikeda, N., Ohgushi, K., Mizumaki, M., Takahashi, R., Nishiyama, N., Inoue, T., Irifune, T. (2013): Pd²⁺-incorporated perovskite CaPd₃B₄O₁₂(B=Ti, V) Inorg. Chem., 52(3), 1604-1609, doi:10.1021/ic3025155[LINK]

Dekura, H., Tsuchiya, T., Tsuchiya, J. (2013): Ab initio lattice thermal conductivity of MgSiO₃ perovskite as found in the Earth's lower mantle, Phys. Rev. Lett., 110(2), 025904, doi:10.1103/PhysRevLett.110.025904[LINK]

Metsue, A., Tsuchiya, T. (2013): Shear response of Fe-bearing MgSiO₃ post-perovskite at lower mantle pressures, Proc. Jpn. Acad., B, 89(1), 51-58, doi:10.2183/pjab.89.51[LINK]

Sato, T., Takada, H., Yagi, T., Gotou, H., Okada, T., Wakabayashi, D., Funamori, N. (2013): Anomalous behavior of cristobalite in helium under high pressure, Phys. Chem. Miner., 40(1), 3-10, doi:10.1007/s00269-012-0540-x[LINK]

Kono, Y., Irifune, T., Ohfuji, H., Higo, Y., Funakoshi, K. (2012): Sound velocities of MORB and absence of a basaltic layer in the mantle transition region, Geophys. Res. Lett., 39(24), doi:10.1029/2012GL054009[LINK]

Nishida, K., Kono, Y., Terasaki, H., Takahashi, S., Ishii, M., Shimoya, Y., Higo, Y., Funakoshi, K., Irifune, T., Ohtani, E. (2013): Sound velocity measurements in liquid Fe-S at high pressure: Implications for Earth's and lunar cores, Earth Planet. Sci. Lett., 362, 182-186, doi:10.1016/j.epsl.2012.11.042[LINK]

Ohuchi, T., Irifune, T. (2013): Development of A-type olivine fabric in water-rich deep upper mantle, Earth Planet. Sci. Lett., 362, 20-30, doi:10.1016/j.epsl.2012.11.029[LINK]

Nishi, M., Kubo, T., Ohfuji, H., Kato, T., Nishihara, Y., Irifune, T. (2013): Slow Si-Al interdiffusion in garnet and stagnation of subducting slabs, Earth Planet. Sci. Lett., 361, 44-49, doi:10.1016/j.epsl.2012.11.022[LINK]

Kawai, K., Tsuchiya, T. (2013): First principles study on the high-pressure phase transition and elasticity of KAISi₃O₈ hollandite, Amer. Mineral., 98(1), 207-218, doi:10.2138/am.2013.4077 [Selected for MSA Notable Articles Dig deeper] [LINK]

Kawai, K., Yamamoto, S., Tsuchiya, T., Maruyama, S. (2013): The second continent: Existence of granitic continental materials around the bottom of the mantle transition zone, Geosci. Front., 4(1), 1-6, doi:10.1016/j.gsf.2012.08.003 [LINK]

Fukui, H., Tsuchiya, T., Baron, A.Q.R. (2012): Lattice dynamics calculations for ferropericlase with internally consistent LDA+U method, J. Geophys. Res., 117, B12202, doi:10.1029/2012JB009591 [LINK]

Okada, H., Komuro, T., Sakai, T., Matsuo, Y., Ono, Y., Omote, K., Yokoo, K., Kawachi, K., Kasama, Y., Ono, S., Hatakeyama, R., Kaneko, T., Tobita, H. (2012): Preparation of endohedral fullerene containing lithium (Li@C₆₀) and isolation as pure hexafluorophosphate salt ([Li⁺@C₆₀][PF₆^-]), RSC Advances, 2(28), 10624-10631, DOI:10.1039/c2ra21244g [LINK]

Kawamoto, T., Kanzaki, M., Mibe, K., Matsukage, K. N., Ono, S. (2012): Separation of supercritical slab-fluids to form aqueous fluid and melt components in subduction zone magmatism. Proc. Natl. Acad. Sci. USA, 109(46), 18695-18700, doi:10.1073/pnas.1207687109[LINK]

Nishi, M., Irifune, T., Ohfuji, H., Tange, Y. (2012): Intracrystalline nucleation during the post-garnet transformation under large overpressure conditions in deep subducting slabs, Geophys. Res. Lett., 39, L23302, doi:10.1029/2012GL053915［LINK］

Zou, Y., Irifune, T. (2012): Phase relations in Mg₃Cr₂Si₃O₁₂ and formation of majoritic knorringite garnet at high pressure and high temperature, J. Miner. Petrol. Sci., 107(5), 197-205, doi:10.2465/jmps.120318[LINK]

Arora, A. k., Nithya, R., Misra, S., Yagi, T. (2012): Behavior of sliver molybdate at high-pressure, J. Solid State Chem., 196, 391-397, doi:10.1016/j.jssc.2012.07.003[LINK]

Okayasu, M., Ohkura, Y., Sakamoto, T., Takeuchi, S., Ohfuji, H., Shiraishi, T. (2012): Mechanical properties of SPCC low carbon steel joints prepared by metal inert gas welding, Mater. Sci. Eng. A, 560, 643-652, doi:10.1016/j.msea.2012.10.008[LINK]

Kamada, S., Ohtani, E., Terasaki, H., Sakai, T., Miyahara, M., Ohishi, Y., Hirao, N. (2012): Melting relationships in the Fe-Fe3S system up to the outer core conditions, Earth Planet. Sci. Lett., 359-360, 26-33, doi:10.1016/j.epsl.2012.09.038[LINK]

Iizuka, R., Yagi, T., Gotou, H., Komatsu, K., Kagi, H. (2012): An opposed-anvil-type apparatus with an optical window and a wide-angle aperture for neutron diffraction, High Press. Res., 32(3), 430-441, doi:10.1080/08957959.2012.722213[LINK]

Kawazoe, T., Yamada, I. (2012): High-pressure synthesis at 10 GPa and 1400 K using a small cubic anvil apparatus with a multi-anvil 6-6 system, High Press. Res., 32(3), 347-353, doi:10.1080/08957959.2012.697900[LINK]

Matsui, M., Higo, Y., Okamoto, Y., Irifune, T., Funakoshi, K. (2012): Simultaneous sound velocity and density measurements of NaCl at high temperatures and high pressures: application as a primary pressure standard, Am. Mineral., 97(10), 1670-1675, doi:10.2138/am.2012.4136[LINK]

Nishiyama, N., Seike, S., Hamaguchi, T., Irifune, T., Matsushita, M., Takahashi, M., Ohfuji, H., Kono, Y. (2012): Synthesis of nanocrystalline bulk SiO₂ stishovite with very high toughness, Scripta Mater., 67(12), 955-958, doi: 10.1016/j.scriptamat.2012.08.028[LINK]

Papers in press

Ichikawa, H., Kameyama, M., Kawai, K. (2012): Mantle convection with continental drift and heat source around the mantle transition zone, Gondwana Res. (in press)

Ichikawa,H., Kawai, K., Yamamoto, S., Kameyama, M. (2013): Supply Rate of Continental Materials to the Deep Mantle through Subduction Channels, Tectonophysics (in press)

Fujino, K., Nishio-Hamane, D., Kuwayama, Y., Sata, N., Murakami, S., Whittaker, M., Shinozaki, A., Ohfuji, H., Kojima, Y., Irifune, T., Hiraoka, N., Ishii, T., Tsuei, K.-D. (2013): Spin state of Fe³⁺ in Al-bearing post-Mg-perovskite, Phys. Earth. Planet. Inter. (in press)

Fang, L., Chen, X., Ohfuji, H., Irifune, T., Sun, G., Chen, B., Peng, S. (2013): Formation of diamond powders from melamine under high pressure and high temperature, Chinese Phys. C (in press)

Ejima, T., Akasaka, M., Nagao, T., Ohfuji, H. (2012): Oxidation state of Fe and precipitates within olivine from orthopyroxene-olivine-clinopyroxene andesite lava from Kasayama volcano, Hagi, Yamatuchi, Japan, J. Miner. Petrol. Sci. (in press)

Tsuchiya, T., Kawai, K., Maruyama, S. (2012): Expanding-Contracting Earth, Geosci. Front. (in press)

Tsuchiya, T., Wang, X. (2012): Ab inition investigation on the high-temperature thermodynamic properties of Fe³⁺-bearing MgSiO₃ perovskite, J. Geophys. Res. (in press)

Miyauchi, A., Kameyama, M., Ichikawa, H. (2012): Linear stability analysis on the influences of the spatial variations in thermal conductivity and expansivity on the flow patterns of thermal convection with strongly temperature-dependent viscosity, J. Earth Sci. (in press)