Influence of temperature, pressure, and oxygen fugacity on the electrical conductivity of dry eclogite, and geophysical implications
文献类型：期刊论文
| 作者 | Dai, Lidong1; Hu, Haiying1; Li, Heping1; Wu, Lei1; Hui, Keshi1; Jiang, Jianjun1,2; Sun, Wenqing1,2 |
| 刊名 | Geochemistry geophysics geosystems
 |
| 出版日期 | 2016-06-01 |
| 卷号 | 17期号:6页码:2394-2407 |
| 关键词 | Electrical conductivity Eclogite Oxygen fugacity Small polaron Dabie-sulu uhpm belt High pressure |
| ISSN号 | 1525-2027 |
| DOI | 10.1002/2016gc006282 |
| 通讯作者 | Dai, lidong(dailidong@vip.gyig.ac.cn) |
| 英文摘要 | 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. |
| WOS关键词 | POLYCRYSTALLINE OLIVINE COMPACTS ; RADIOGENIC HEAT-PRODUCTION ; IN-SITU CONTROL ; HYDROGEN DIFFUSION ; CONTINENTAL-CRUST ; WATER-CONTENT ; LABORATORY MEASUREMENTS ; CHEMICAL-COMPOSITION ; OXIDATION-STATE ; TRANSITION ZONE |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000380728300023 |
| 出版者 | AMER GEOPHYSICAL UNION |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374475 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Dai, Lidong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Key Lab High Temp & High Pressure Study Earths In, Guiyang, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, Lidong,Hu, Haiying,Li, Heping,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 | Dai, Lidong.,Hu, Haiying.,Li, Heping.,Wu, Lei.,Hui, Keshi.,...&Sun, Wenqing.(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 | Dai, Lidong,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. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。