Conductance map of the United States (progress report)

Details Conductance map of the United States (progress report) Conductance map of the United States (progress report)

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...45..216k&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 45, Issue 2, p. 216-225.

Physics

2

Scientific paper

Efforts to determine the conductivity in the Earth at lithospheric and mantle depths are inhibited by the effect of conductive rocks and sea water at the surface on the behavior of electromagnetic fields. Experience has suggested that the surface effect can be modeled as though that layer were vanishingly thin but with a non-zero conductance. A map of the conductance of the surface layer in the 48 coterminous United States is being compiled using electrical conductivity surveys run in deep oil wells as a source of data. Surface conductance values range from less than 1 S in areas of basement outcrop to values of 5000-6000 S in deep, young sedimentary basins, such as those along the southern Gulf Coast of the United States.

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