中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Thermal diffusivity and thermal conductivity of granitoids at 283–988 K and 0.3–1.5 GPa

文献类型:期刊论文

作者Huangfei Fu;   Baohua Zhang;   Jianhua Ge;   Zili Xiong;   Shuangmeng Zhai;   Shuangming Shan;   Heping Li
刊名American Mineralogist
出版日期2019
卷号104期号:11页码:1533–1545
关键词Thermal Diffusivity Thermal Conductivity granitoid crust
英文摘要

The thermal diffusivity and thermal conductivity of four natural granitoid samples were simultaneously measured at high pressures (up to 1.5 GPa) and temperatures (up to 988 K) in a multi-anvil apparatus using the transient plane–source method. Experimental results show that thermal diffusivity and thermal conductivity decreased with increasing temperature (<600 K) and remain constant or slightly increase at a temperature range from 700 to 988 K. Thermal conductivity decreases 23–46% between room temperature and 988 K, suggesting typical manifestations of phonon conductivity. At higher temperatures, an additional radiative contribution is observed in four natural granitoids. Pressure exerts a weak but clear and positive influence on thermal transport properties. The thermal diffusivity and thermal conductivity of all granitoid samples exhibit a positive linear dependence on quartz content, whereas a negative linear dependence on plagioclase content appears. Combining these results with the measured densities, thermal diffusivity, and thermal conductivity, and specific heat capacities of end-member minerals, the thermal diffusivity and thermal conductivity and bulk heat capacities for granitoids predicted from several mixing models are found to be consistent with the present experimental data. Furthermore, by combining the measured thermal properties and surface heat flows, calculated geotherms suggest that the presence of partial melting induced by muscovite or biotite dehydration likely occurs in the upper-middle crust of southern Tibet. This finding provides new insights into the origin of low-velocity and high-conductivity anomaly zones revealed by geophysical observations in this region.

语种英语
源URL[http://ir.gyig.ac.cn/handle/42920512-1/10395]  
专题地球化学研究所_地球内部物质高温高压实验室
作者单位1.Key Laboratory for High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550081, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714
Huangfei Fu; Baohua Zhang; Jianhua Ge; Zili Xiong; Shuangmeng Zhai; Shuangming Shan; Heping Li. Thermal diffusivity and thermal conductivity of granitoids at 283–988 K and 0.3–1.5 GPa[J]. American Mineralogist,2019,104(11):1533–1545.
APA Huangfei Fu; Baohua Zhang; Jianhua Ge; Zili Xiong; Shuangmeng Zhai; Shuangming Shan; Heping Li.(2019).Thermal diffusivity and thermal conductivity of granitoids at 283–988 K and 0.3–1.5 GPa.American Mineralogist,104(11),1533–1545.
MLA Huangfei Fu; Baohua Zhang; Jianhua Ge; Zili Xiong; Shuangmeng Zhai; Shuangming Shan; Heping Li."Thermal diffusivity and thermal conductivity of granitoids at 283–988 K and 0.3–1.5 GPa".American Mineralogist 104.11(2019):1533–1545.

入库方式: OAI收割

来源:地球化学研究所

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