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Effect of dehydration on the electrical conductivity of phyllite at high temperatures and pressures
Wenqing Sun;  Lidong Dai;  Heping Li;  Haiying Hu;  Jianjun Jiang;  Keshi Hui
2017
发表期刊Mineralogy and Petrology
卷号111期号:6页码:853-863
摘要

The electrical conductivity of phyllite (measured in situ at 0.5-2.5 GPa and 773-1173 K) increases with increasing temperature, satisfying an Arrhenius relation. Dehydration of phyllite at 973-1173 K enormously enhances its electrical conductivity, and the activation enthalpy (0.64-0.81 eV) remains almost constant before and after dehydration. The inflection point of the relationship between electrical conductivity and temperature is used to determine the dehydration temperature (T (d) ) at each considered pressure (P), leading to the following relationship: T (d) = 1181 - 100P. The derived relation implies that the dehydration depths of hot and cold subduction zones are similar to 70 and similar to 129 km respectively, which are both close to the depths of arc magma source regions, thereby indicating that the dehydration of pelite significantly influences the generation of melt in subduction zones.

关键词High Temperature And High Pressure Electrical Conductivity Phyllite Dehydration Subduction Zone
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8012
专题地球内部物质高温高压实验室
作者单位1.Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
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Wenqing Sun;Lidong Dai;Heping Li;Haiying Hu;Jianjun Jiang;Keshi Hui. Effect of dehydration on the electrical conductivity of phyllite at high temperatures and pressures[J]. Mineralogy and Petrology,2017,111(6):853-863.
APA Wenqing Sun;Lidong Dai;Heping Li;Haiying Hu;Jianjun Jiang;Keshi Hui.(2017).Effect of dehydration on the electrical conductivity of phyllite at high temperatures and pressures.Mineralogy and Petrology,111(6),853-863.
MLA Wenqing Sun;Lidong Dai;Heping Li;Haiying Hu;Jianjun Jiang;Keshi Hui."Effect of dehydration on the electrical conductivity of phyllite at high temperatures and pressures".Mineralogy and Petrology 111.6(2017):853-863.
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