Physics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pepi...33..198r&link_type=abstract
(European Geophysical Society, Symposium on Lateral Heterogeneity in the Lithosphere, Leeds, England, Aug. 23-28, 1982) Physics
Physics
9
Earth Mantle, Electromagnetism, Geomagnetism, Continents, Earth Crust, Electrical Resistivity, Heat Flux, Lithosphere, Oceans, Tectonics, Two Dimensional Models
Scientific paper
It is pointed out that measurements of the electric and magnetic fields at the surface of the earth can provide information about the electrical conductivity at upper mantle depths. Data regarding the electrical conductivity provide a basis for the deduction of information about other physical properties of the mantle. It is, therefore, not unreasonable to expect that electrical sounding techniques can provide useful information concerning lateral heterogeneities and thus convection within the upper mantle. Attention is given to the advantages and problems of electromagnetic (EM) sounding techniques, the geophysical significance of a given conductivity, tectonically active regions, oceanic measurements, continental regions, and two-dimensional models.
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