GYIG OpenIR  > 地球内部物质高温高压实验室  > 期刊论文
Influence of temperature, pressure, and oxygen fugacity on the electrical conductivity of dry eclogite, and geophysical implications
Lidong Dai; Haiying Hu; Heping Li; Lei Wu; Keshi Hui; Jianjun Jiang; Wenqing Sun
2016
Source PublicationGeochemistry, Geophysics, Geosystems
Volume17Issue:6Pages:2394-2407
Abstract

The electrical conductivity of eclogite was measured at temperatures of 873-1173 K and pressures of 1.0-3.0 GPa within a frequency range of 0.1-10(6) Hz using a YJ-3000t multianvil press and Solartron-1260 impedance/gain-phase analyzer. Three solid-state oxygen buffers (Cu+CuO, Ni+NiO, and Mo+MoO2) were employed to control the oxygen fugacity. Experimental results indicate that the electrical conductivity of the samples tended to increase with increasing temperature, conforming to an Arrhenius relation. Under the control of a Cu+CuO oxygen buffer, the electrical conductivity of the eclogite decreased with a rise in pressure, and its corresponding activation volume and activation energy at atmospheric pressure were calculated as -2.510.29 cm(3)/mole and 0.860.12 eV, respectively. At 2.0 GPa, the electrical conductivity of the eclogite increased with increasing oxygen fugacity, and the preexponential factor increased while the activation enthalpy decreased. The observed positive exponential factor for the dependence of electrical conductivity on oxygen fugacity, as well as the negative activation volume, confirm that the hopping of small polarons is the dominant conduction mechanism in eclogite at high temperatures and pressures. Our results suggest that the electrical conductivity of dry eclogite under various redox conditions cannot explain the high anomalies in conductivity under stable midlower continental crust and under the Dabie-Sulu ultrahigh-pressure metamorphic belt of eastern China.

Subject Area地球深部物质与流体作用地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6517
Collection地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
Recommended Citation
GB/T 7714
Lidong Dai,Haiying Hu,Heping Li,et al. Influence of temperature, pressure, and oxygen fugacity on the electrical conductivity of dry eclogite, and geophysical implications[J]. Geochemistry, Geophysics, Geosystems,2016,17(6):2394-2407.
APA Lidong Dai.,Haiying Hu.,Heping Li.,Lei Wu.,Keshi Hui.,...&Wenqing Sun.(2016).Influence of temperature, pressure, and oxygen fugacity on the electrical conductivity of dry eclogite, and geophysical implications.Geochemistry, Geophysics, Geosystems,17(6),2394-2407.
MLA Lidong Dai,et al."Influence of temperature, pressure, and oxygen fugacity on the electrical conductivity of dry eclogite, and geophysical implications".Geochemistry, Geophysics, Geosystems 17.6(2016):2394-2407.
Files in This Item:
File Name/Size DocType Version Access License
Influence of tempera(1112KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lidong Dai]'s Articles
[Haiying Hu]'s Articles
[Heping Li]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lidong Dai]'s Articles
[Haiying Hu]'s Articles
[Heping Li]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lidong Dai]'s Articles
[Haiying Hu]'s Articles
[Heping Li]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Influence of temperature, pressure, and oxygen fugacity on the electrical conductivity of dry eclogite, and geophysical implications.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

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