Experimental study on electrical conductivity of pyrolite at high temperature and high pressure
文献类型：期刊论文
| 作者 | Gao ChunYang1,2; Huang XiaoGe2; Dai WeiQi1,2; Chen ZuAn2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020-09-01 |
| 卷号 | 63期号:9页码:3409-3419 |
| 关键词 | Electrical conductivity Pyrolite High temperature and high pressure Pressure |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2020O0100 |
| 英文摘要 | The purpose of this work was to construct a generally electrical structure of the upper mantle. The electrical conductivity of dry pyrolite was measured on Kawai-1000t multi-anvil apparatus and Solartron-1260 impedance/Gain-Phase analyzer in the conditions of 4. 0 similar to 14. 0 GPa, 873 similar to 1673 K and 10(-1)similar to 10(6) Hz frequency ranges. The experimental results show that the electrical conductivity significantly increases with temperature. The conductive mechanism of pyrolite changes over a wide temperature range. When temperature is less than 1473 K, the small polaron model is the dominant conduction mechanism, activation energy Delta H and activation volume are 0. 94 eV +/- 0. 13 eV and 0. 11(+/- 0. 92) cm(3) . mol(-1), respectively. When temperature is more than 1473 K, the ionic conduction is the dominant conduction mechanism, activation energy Delta H and activation volume are 1.6 similar to 3.17 eV and 6.75 (+/- 7.43) cm(3) . mol(-1), respectively. The electrical conductivity of pyrolite is higher than that of mantle minerals and the rock under low pressure. In shallow mantle above 200 km depth, the electrical conductivity profile obtained by the experiments is consistent with the result of magnetotelluric sounding. However, in deep mantle under 200 km depth, the experimental result is a little higher than that of field measurement, perhaps because of the presence of water in the samples. In addition, the results of this experiment are two orders of magnitude higher than the electrical conductivity calculated by the effective uniform medium method according to the pyrolite mineral model, which indicates that the results calculated using the electrical conductivity of only one or several minerals are not reasonable to some extent. |
| WOS关键词 | ORTHO-PYROXENE ; WATER-CONTENT ; OLIVINE ; BENEATH ; PHASE ; MODEL ; ASTHENOSPHERE ; SOLUBILITY ; MINERALS ; GARNET |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000566758300015 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98244]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Huang XiaoGe |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao ChunYang,Huang XiaoGe,Dai WeiQi,et al. Experimental study on electrical conductivity of pyrolite at high temperature and high pressure[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(9):3409-3419. |
| APA | Gao ChunYang,Huang XiaoGe,Dai WeiQi,&Chen ZuAn.(2020).Experimental study on electrical conductivity of pyrolite at high temperature and high pressure.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(9),3409-3419. |
| MLA | Gao ChunYang,et al."Experimental study on electrical conductivity of pyrolite at high temperature and high pressure".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.9(2020):3409-3419. |
入库方式： OAI收割
来源：地质与地球物理研究所
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