IGGCAS OpenIR  > 地球与行星物理院重点实验室
Experimental study on electrical conductivity of pyrolite at high temperature and high pressure
Gao ChunYang1,2; Huang XiaoGe1; Dai WeiQi1,2; Chen ZuAn1
2020-09-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume63Issue:9Pages:3409-3419
AbstractThe 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.
KeywordElectrical conductivity Pyrolite High temperature and high pressure Pressure
DOI10.6038/cjg2020O0100
WOS KeywordORTHO-PYROXENE ; WATER-CONTENT ; OLIVINE ; BENEATH ; PHASE ; MODEL ; ASTHENOSPHERE ; SOLUBILITY ; MINERALS ; GARNET
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000566758300015
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/98244
Collection地球与行星物理院重点实验室
Corresponding AuthorHuang XiaoGe
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Gao ChunYang]'s Articles
[Huang XiaoGe]'s Articles
[Dai WeiQi]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gao ChunYang]'s Articles
[Huang XiaoGe]'s Articles
[Dai WeiQi]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gao ChunYang]'s Articles
[Huang XiaoGe]'s Articles
[Dai WeiQi]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.