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	Electrical conductivity of two-pyroxene granulite under high pressure in northern margin of north china craton
	Li Peng1,2; Zhou Wen-Ge1; Gong Chao-Ying1,2; Fan Da-Wei1; Wei Shu-Yi1,2; Xie Hong-Sen1
刊名	Chinese journal of geophysics-chinese edition
	2010-10-01
卷号	53期号:10页码:2386-2395
关键词	Two-pyroxene granulite Electrical conductivity High pressure The lower crust North china craton
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2010.10.012
通讯作者	Li peng(niaolp@163.com)
英文摘要	Electrical conductivity of two-pyroxene granulite, collected from north margin of north china craton, was measured at 1.0 similar to 2.0 gpa and 523 similar to 1173 k by using three different methods at the same time. the three methods are an impedance spectroscopy for a broad frequency range of 0.05 to 10(-6) hz, a single lower frequency (0.1 hz), and the dc-method. the experiments were carried out in a measurement system of electrical conductivity, which consisted of an yj-3000t multi-anvil apparatus, a solartron is-1260 impedance/gain-phase analyzer, an agilent 34401a multimeter, and a computer. the experimental results indicate that within the range of experimental temperature and pressure, the electrical conductivity of two-pyroxene granulite changes from 2.66 x 10(-5) s center dot m(-1) to 0.056 s center dot m(-1) and hardly has a dependence on the given pressure. with increasing temperature, the electrical conductivity increases. the conductivity-temperature relation follows an arrhenius behavior. the pre-exponential factor and activation energy of the arrhenius formula are 8.95 similar to 17.9 s center dot m(-1) and 0.569 similar to 0.605 ev, respectively. the comparison of the results obtained by the three methods indicates that the result measured by the impedance spectroscopy is always higher than that of the 0.1 hz's and the result determined by the dc-method is always the lowest. nevertheless the difference among the data points is less than 0.20 lg (s/m) except for two low-temperature points. based on the experimental results, the regional crust model and the geothermal gradient, we constructed the profiles of conductivity versus depth. the comparison of the calculated results with the electrical structure of this area reveals that the electrical conductivity of two-pyroxene granulite intersects the range of the electrical conductivity of the lower middle crust and the lowermost crust beneath this area. combining with the conclusion of the in situ seismic velocity measurement and the seismic refraction profile, we can conclude that the two-pyroxene granulite could be a constituent of the lower crust in the northern margin of north china craton.
WOS关键词	CONTINENTAL-CRUST ; LABORATORY MEASUREMENTS ; GEOSCIENCE TRANSECT ; HIGH-TEMPERATURE ; TRANSITION ZONE ; OXYGEN FUGACITY ; WATER-CONTENT ; WADSLEYITE ; ROCKS ; RINGWOODITE
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000283754800012
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2411199
专题	中国科学院大学
通讯作者	Li Peng
作者单位	1.Chinese Acad Sci, Lab Earths Interior & Geofluid Geochem, Inst Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li Peng,Zhou Wen-Ge,Gong Chao-Ying,et al. Electrical conductivity of two-pyroxene granulite under high pressure in northern margin of north china craton[J]. Chinese journal of geophysics-chinese edition,2010,53(10):2386-2395.
APA	Li Peng,Zhou Wen-Ge,Gong Chao-Ying,Fan Da-Wei,Wei Shu-Yi,&Xie Hong-Sen.(2010).Electrical conductivity of two-pyroxene granulite under high pressure in northern margin of north china craton.Chinese journal of geophysics-chinese edition,53(10),2386-2395.
MLA	Li Peng,et al."Electrical conductivity of two-pyroxene granulite under high pressure in northern margin of north china craton".Chinese journal of geophysics-chinese edition 53.10(2010):2386-2395.

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