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Thermal Diffusivity of Lherzolite at High Pressures and High Temperatures Using Pulse Method | |
Sheqiang Miao; Yongsheng Zhou; Heping Li | |
2019 | |
Source Publication | Journal of Earth Science
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Volume | 30Issue:1Pages:218-222 |
Abstract | Lherzolite is one of the most important components of the subcontinental mantle lithosphere, and the study of its heat transfer properties aids in understanding the thermal structure of the continental mantle lithosphere. Currently, few studies have examined the heat transfer properties of lherzolite, and the experimental results remain controversial. This experiment utilized a pulse method to measure the thermal diffusivity of lherzolite at pressures ranging from 1.0 to 4.0 GPa and temperatures from 300 to 1 073 K on a cubic press apparatus. We obtained a thermal diffusivity for lherzolite of approximately 2.10 mm(2)s(-1) at ambient condition. The experimental pressure derivative of the thermal conductivity of lherzolite decreased with temperature, reaching approximately 10% at high temperature, a value higher than the previously reported 4%, which indicates that the temperature gradient of the upper mantle lithosphere is smaller than previously thought. Therefore, concerning calculation of the lithosphere thickness using the thermal conductivity of the lherzolite, the previous calculation using pressure derivative of the thermal conductivity of 4% may cause an underestimation of the upper mantle lithosphere thickness by approximately 6% in a first approximation. |
Keyword | Thermal Diffusivity Lherzolite Pulse Method Pressure Derivative |
Indexed By | SCI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/10250 |
Collection | 地球内部物质高温高压实验室 |
Affiliation | 1.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing 100029, Peoples R China 2.Chinese Acad Sci, CAS Key Lab High Temp & High Pressure Study Earth, Inst Geochem, Guiyang 550081, Guizhou, Peoples R China |
Recommended Citation GB/T 7714 | Sheqiang Miao;Yongsheng Zhou;Heping Li. Thermal Diffusivity of Lherzolite at High Pressures and High Temperatures Using Pulse Method[J]. Journal of Earth Science,2019,30(1):218-222. |
APA | Sheqiang Miao;Yongsheng Zhou;Heping Li.(2019).Thermal Diffusivity of Lherzolite at High Pressures and High Temperatures Using Pulse Method.Journal of Earth Science,30(1),218-222. |
MLA | Sheqiang Miao;Yongsheng Zhou;Heping Li."Thermal Diffusivity of Lherzolite at High Pressures and High Temperatures Using Pulse Method".Journal of Earth Science 30.1(2019):218-222. |
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Thermal Diffusivity (526KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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