TY - JOUR
T1 - In situ electrical conductivity measurement of high-pressure molten (Mg0.875,Fe0.125)2SiO4
AU - Li, Ming
AU - Gao, Chunxiao
AU - Ma, Yanzhang
AU - Wang, Duojun
AU - Li, Yanchun
AU - Liu, Jing
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 40473034, 10574055, and 50532020), the National Basic Research Program of China (Grant No. 2005CB724404), and the the U.S. National Science Foundation (Grant No. DMR-0619215).
PY - 2007
Y1 - 2007
N2 - In situ resistance measurement of mantle mineral under high temperature and pressure has been considered an important method for studying the electrical properties and thermal states of Earth's interior. Here the authors report the results of the electrical conductivity of molten olivine [(Mg0.875, Fe0.125) 2 Si O4] on diamond anvil cell with pressure at 13.2 GPa and temperature at 3720 K. The results indicate that the activation enthalpy of molten olivine is much less than that of solid, and its conductivity is relatively insensitive to temperature. Moreover, at the given temperature range the conductivity of molten olivine exhibits Arrhenius behavior perfectly. Compared to the results of Hawaiian tholeiite provided by Tyburczy and Waff [J. Geophys. Res. 88, 1413 (1983)] at lower pressure and temperature, the pressure effect on molten olivine conductivity is slightly weaker. This method for electrical conductivity measurement on laser-heated diamond anvil cell allows the environment simulation study of unresearched regions of Earth, no longer restricted to large cavity press.
AB - In situ resistance measurement of mantle mineral under high temperature and pressure has been considered an important method for studying the electrical properties and thermal states of Earth's interior. Here the authors report the results of the electrical conductivity of molten olivine [(Mg0.875, Fe0.125) 2 Si O4] on diamond anvil cell with pressure at 13.2 GPa and temperature at 3720 K. The results indicate that the activation enthalpy of molten olivine is much less than that of solid, and its conductivity is relatively insensitive to temperature. Moreover, at the given temperature range the conductivity of molten olivine exhibits Arrhenius behavior perfectly. Compared to the results of Hawaiian tholeiite provided by Tyburczy and Waff [J. Geophys. Res. 88, 1413 (1983)] at lower pressure and temperature, the pressure effect on molten olivine conductivity is slightly weaker. This method for electrical conductivity measurement on laser-heated diamond anvil cell allows the environment simulation study of unresearched regions of Earth, no longer restricted to large cavity press.
UR - http://www.scopus.com/inward/record.url?scp=33947329643&partnerID=8YFLogxK
U2 - 10.1063/1.2712811
DO - 10.1063/1.2712811
M3 - Article
AN - SCOPUS:33947329643
VL - 90
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 11
M1 - 113507
ER -