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Effect of temperature, pressure and chemical composition on the electrical conductivity of granulite and geophysical implications | |
Wenqing SUN; Lidong DAI; Heping LI; Haiying HU; Changcai LIU | |
2019 | |
发表期刊 | Journal of Mineralogical and Petrological Sciences
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卷号 | 114期号:6页码:87–98 |
摘要 | Electrical conductivities of three granulite samples (main minerals: plagioclase, quartz, and biotite) with different chemical compositions (WB, the weight percent of Fe2O3 = 5.49, 8.75, and 14.79 wt%) were researched using a complex impedance spectroscopic technique at 1.0–3.0 GPa and 623–1073 K from 10−1 to 106 Hz. The experimental results indicated that the granulite conductivities markedly increased with temperature and slightly decreased with increasing pressure. Under the experimental conditions, the temperature dependence of the conductivities of granulite followed an Arrhenius relationship at certain temperatures. The electrical conductivities of granulite significantly increased with increasing biotite content and WB. According to the activation enthalpies and previous studies, the conduction mechanism of the granulite samples with WB = 8.75 and 14.79 wt% was small polaron conduction under the experimental conditions, and the conduction mechanisms of the granulite sample with WB = 5.49 wt% were small polaron conduction at high temperatures and impurity conduction at low temperatures. The high conductivity anomalies under the ductile shear zones in southern India can be interpreted by the conductivities of granulite with interconnected biotite and a high iron content (>14.79 wt%). |
关键词 | Electrical Conductivity granulite high Pressure conduction Mechanism high Conductivity Anomaly |
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/42920512-1/10450 |
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 |
推荐引用方式 GB/T 7714 | Wenqing SUN; Lidong DAI;Heping LI;Haiying HU;Changcai LIU. Effect of temperature, pressure and chemical composition on the electrical conductivity of granulite and geophysical implications[J]. Journal of Mineralogical and Petrological Sciences,2019,114(6):87–98. |
APA | Wenqing SUN; Lidong DAI;Heping LI;Haiying HU;Changcai LIU.(2019).Effect of temperature, pressure and chemical composition on the electrical conductivity of granulite and geophysical implications.Journal of Mineralogical and Petrological Sciences,114(6),87–98. |
MLA | Wenqing SUN; Lidong DAI;Heping LI;Haiying HU;Changcai LIU."Effect of temperature, pressure and chemical composition on the electrical conductivity of granulite and geophysical implications".Journal of Mineralogical and Petrological Sciences 114.6(2019):87–98. |
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