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A comparison of upper mantle subcontinental electrical conductivity for North America, Europe, and Asia.

Journal of Geophysics - Zeitschrift fur Geophysik

By:
and

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Abstract

Spherical harmonic analysis coefficients of the external and internal parts of the quiet-day geomagnetic field variations (Sq), separated for the N American, European, Central Asian and E Asian regions, were used to determine conductivity profiles to depths of about 600km by the Schmucker equivalent-substitute conductor method. All 3 regions showed a roughly exponential increase of conductivity with depth. Distinct discontinuities seemed to be evident near 255-300km and near 450-600km. Regional differences in the conductivity profiles were shown by the functional fittings to the data. For depths less than about 275km, the N American conductivities seemed to be significantly higher than the other regions. For depths greater than about 300km, the E Asian conductivities were largest. -Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A comparison of upper mantle subcontinental electrical conductivity for North America, Europe, and Asia.
Series title:
Journal of Geophysics - Zeitschrift fur Geophysik
Volume
59
Issue:
1
Year Published:
1986
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Geophysics - Zeitschrift fur Geophysik
First page:
56
Last page:
61