Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 80, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3097882
Keywords
electrical conductivity; geochemistry; geophysical techniques; grain boundaries; high-pressure effects; high-temperature effects; iron compounds; molybdenum compounds; nickel compounds; oxygen; rocks; X-ray diffraction
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Funding
- NSF of China [40704010, 40573046, 49674221]
- Large-scale Scientific Apparatus Development Program of CAS
- 863 High Technology Research and Development Program of China [2006AA09Z205]
- Knowledge-Innovation Key Orientation Project of CAS [KZCX3-SW124]
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This paper describes the development and application of a novel method for the measurement of grain boundary electrical conductivity of rock at high temperature and pressure. In this method, the metal electrodes, the corresponding metal shielding case, and the sleeves are altered in order to appropriately adjust and monitor the oxygen fugacity in a sample cavity in a high-pressure apparatus. As an example, a series of oxygen buffers including Fe3O4+Fe2O3, Ni+NiO, Fe+Fe3O4, Fe+FeO, and Mo+MoO2 was selected and tested, and the oxygen fugacity was confirmed as adjusted during the process of electrical conductivity measurements. Application of this method provides a powerful means of restricting specific thermodynamic conditions at high temperature and pressure.
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