The electrical conductivity of gabbro at high temperature and high pressure

The electric conductivity of gabbro has been measured at 1.0-2.0 GPa and 320-700°C, and the conduction mechanism has been analyzed in terms of the impedance spectra. Experimental results indicated that the electric conductivity depends on the frequency of alternative current. Impedance arcs represen...

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Bibliographic Details
Published in:Acta geochimica 2002-07, Vol.21 (3), p.252-257
Main Authors: Doujun, Wang, Heping, Li, Li, Yi, Weigang, Zhang, Congqiang, Liu, Gengli, Suo, Dongye, Ding
Format: Article
Language:English
Subjects:
Conduction
Conductivity
Electric arcs
Electrical conductivity
Electrical resistivity
Gabbro
Geochemistry
Geophysics
High pressure
High temperature
Impedance
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Summary:The electric conductivity of gabbro has been measured at 1.0-2.0 GPa and 320-700°C, and the conduction mechanism has been analyzed in terms of the impedance spectra. Experimental results indicated that the electric conductivity depends on the frequency of alternative current. Impedance arcs representing the conduction mechanism of grain interiors are displayed in the complex impedance plane, and the mechanism is dominated at high pressure. These arcs occur over the range of 10^sup 2^ -k × 10^sup 5^ Hz (k is the positive integer from 1 to 9). On the basis of our results and previous work, it is concluded that gabbro cannot form any high conductivity layer (HCL) in the middle-lower crust.[PUBLICATION ABSTRACT]
ISSN:1000-9426
2096-0956
1993-0364
2365-7499
DOI:10.1007/BF02831090