Negative pressure effect on the electrical conductivity of San Carlos olivine and its implication to the electrical structure in the upper mantle

Chen SiBo Guo Xinzhuan Zhou Chunyin Jin Zhenmin · 2016

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期刊名称：

Science China Earth Sciences 2016 年 59 卷 10 期

发表日期：

2016.10.01

摘要：

Pressure effect on the electrical conductivity of San Carlos olivine was investigated by the newly installed electrical conductivity measurement system at China University of Geosciences. Electrical conductivity of San Carlos olivine aggregates was measured up to 12 GPa and 1475 K using the Walker-type multi-anvil apparatus equipped with eight WC cubes as the second-stage anvils. The pressure generation against applied load for the experimental assemblage was examined by phase transition of Bi, quartz, forsterite under different P-T conditions. To check the data validity of this new system, electrical conductivities of the serpentinites and talc samples were measured. The results are consistent with the published data of the same samples. Electrical conductivity (??) of the San Carlos olivine aggregates and temperature (T) satisfy the Arrhenian formula: ??=??