Effect of dehydration on the electrical conductivity of phyllite at high temperatures and pressures

	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
推荐引用方式 GB/T 7714	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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