Experimental study on the electrical conductivity of orthopyroxene at high temperature and high pressure under different oxygen fugacities
文献类型：期刊论文
| 作者 | Dai, LD; Li, HP; Liu, CQ; Shan, SM; Cui, TD; Su, GL |
| 刊名 | Acta geologica sinica-english edition
 |
| 出版日期 | 2005 |
| 卷号 | 79期号:6页码:803-809 |
| 关键词 | Orthopyroxene High temperature and high pressure Electrical conductivity Oxygen fugacity Small polaron |
| ISSN号 | 1000-9515 |
| 通讯作者 | Dai, ld(dailidong717@hotmail.com) |
| 英文摘要 | At presure 1.0-4.0 gpa and temperature 1073-1423 k and under oxygen partial pressure conditions, a yj-3000t multi-anvil solid high-pressure apparatus and sarltron-1260 impedance/gain-phase analyzer were employed to conduct an in-situ measurement of the electrical conductivity of orthopyroxene. the buffering reagents consist of ni+nio, fe+fe(3)o(4), fe+feo and mo+moo(2) in order to control the environmental oxygen fugacity. experimental results made clear that: (1) within the measuring frequency range from 10(-1) to 10(6) hz, the complex impedance (r) is of intensive dependence on the frequency; (2) the electrical conductivity (sigma) tends to increase along to the rise of temperature (t), and log sigma vs. 1/t fit the arrenhius linear relations; (3) under the control of oxygen buffer fe+fe(3)o(4), with the rise of pressure, the activation enthalpy tends to increase whereas the electrical conductivity tends to decrease. the activation energy and activation volume of the main current carriers of orthopyroxene have been obtained, which are (1.715 +/- 0.035) ev and (0.03 +/- 0.01) cm(3)/mol, respectively; (4) under given pressure and temperature, the electrical conductivity tends to increase with increasing oxygen fugacity, while under given pressure the activation enthalpy tends to decrease with increasing oxygen fugacity; and (5) the sample's small polarons mechanism has provided a reasonable explanations to the conduction behavior at high temperature and high pressure. |
| WOS关键词 | IN-SITU CONTROL ; LABORATORY MEASUREMENTS ; FE-FEO ; OLIVINE ; MANTLE ; RINGWOODITE ; MINERALS ; WADSLEYITE ; DUNITE ; GPA |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000234441600011 |
| 出版者 | WILEY-BLACKWELL |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377857 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Dai, LD |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Lab Earths Interior Mat & Fluid Geochem, Guiyang 550002, Guizhou, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China 4.Univ Guizhou, Guiyang 550004, Guizhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, LD,Li, HP,Liu, CQ,et al. Experimental study on the electrical conductivity of orthopyroxene at high temperature and high pressure under different oxygen fugacities[J]. Acta geologica sinica-english edition,2005,79(6):803-809. |
| APA | Dai, LD,Li, HP,Liu, CQ,Shan, SM,Cui, TD,&Su, GL.(2005).Experimental study on the electrical conductivity of orthopyroxene at high temperature and high pressure under different oxygen fugacities.Acta geologica sinica-english edition,79(6),803-809. |
| MLA | Dai, LD,et al."Experimental study on the electrical conductivity of orthopyroxene at high temperature and high pressure under different oxygen fugacities".Acta geologica sinica-english edition 79.6(2005):803-809. |
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来源：中国科学院大学
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