HR: 14:25h
AN: V32E-04 [PDF]
TI: Generation of pressures exceeding 50 GPa in multianvil apparatus and some applications to lower mantle
mineralogy
AU: * Irifune, T
EM: irifune@dpc.ehime-u.ac.jp
AF: Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577
Japan
AU: Sueda, Y
EM: sueda@sci.ehime-u.ac.jp
AF: Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577
Japan
AU: Sanehira, T
EM: sanehira@sci.ehime-u.ac.jp
AF: Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577
Japan
AU: Yamazaki, D
EM: yamazaki@sci.ehime-u.ac.jp
AF: Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577
Japan
AU: Nishiyama, N
EM: nisiyama@sci.ehime-u.ac.jp
AF: Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577
Japan
AU: Funakoshi, K
EM: funakosi@spring8.or.jp
AF: JASRI/SPring-8, 1-1-1 Kouto, Mikazuki, Sayo, Hyogo, 679-5148
AB:
We have been working to extend the pressure range available in Kawai-type multianvil apparatus using sintered diamond
composites for the second stage anvils. Pressure was evaluated by unit-cell volume changes in some reference materials,
based on in situ X-ray diffraction measurements using synchrotron radiation at SPring-8. Pressures to 55 GPa at room
temperature has so far been produced in a cell assembly for anvils with TEL=1.5 mm, using the newly installed multianvil
apparatus (SPEED-MkII) at BL04B1. Pressures greater than this may be available within the capacity of this apparatus by
further modifications of the high-pressure cell. Phase transitions and P-V-T relations of some minerals relevant to the
mantle and subducted crust lithologies, such as CaSiO3 perovakite, MgAl2O4 calcium ferrite, KAlSi3O8 hollandite, etc., have
been successfully studied at pressures to ~40 GPa, and temperatures to ~2000K, equivalent to depths of ~1200 km in the lower
mantle, using the in situ X-ray diffraction measurements.
DE: 1212 Earth's interior--composition and state (8105)
DE: 3900 MINERAL PHYSICS
DE: 3919 Equations of state
DE: 3924 High-pressure behavior
DE: 3954 X ray, neutron, and electron spectroscopy and diffraction
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting