Analyzing electromagnetic induction data: Suggestions from laboratory measurements |
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| Authors: | A G Duba T J Shankland |
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| Institution: | (1) Earth Sciences Department, Lawrence Livermore National Laboratory, 94550 Livermore, CA, U.S.A.;(2) Earth and Space Sciences Division, Geophysics Group, Los Alamos National Laboratory, 87545 Los Alamos, NM, U.S.A. |
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| Abstract: | Recent inversions of electrical profiles of the upper mantle beneath the oceans permit a variety of conductivity-depth profiles ranging from models with monotonically increasing conductivity to layered models having decreases of conductivity with depth. Laboratory data on possible mantle materials can physically explain high mantle conductivities in terms of a fluid phase (partial melt, hydrous fluid) or a good solid conductor (amorphous or graphitic carbon) and favor a profile having a high conductivity layer (HCL) underlain by a more resistive layer. |
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| Keywords: | Mantle temperature profile electrical conductivity |
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