A semi-global reference model for electrical conductivity in the mid-mantle beneath the north Pacific region

Details A semi-global reference model for electrical conductivity in the mid-mantle beneath the north Pacific region A semi-global reference model for electrical conductivity in the mid-mantle beneath the north Pacific region

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30d..43u&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 4, pp. 43-1, CiteID 1194, DOI 10.1029/2002GL016092

Physics

Geophysics

38

Geomagnetism And Paleomagnetism: Geomagnetic Induction, Marine Geology And Geophysics: Geomagnetism (1550), Mathematical Geophysics: Modeling, Physical Properties Of Rocks: Magnetic And Electrical Properties, Information Related To Geographic Region: Pacific Ocean

Scientific paper

One-dimensional electrical conductivity structure in the mid-mantle of the one-fourth of the Earth beneath the north Pacific Ocean was obtained by a semi-global electromagnetic induction study. Electromagnetic response functions estimated from electric field variations measured by submarine cables and geomagnetic field variations obtained by magnetic observatories and long-term observations sites were inverted into radially symmetric conductivity distribution by taking the distribution of land and ocean at the surface into account. As a most preferred model, a smooth conductivity-depth profile was obtained with two abrupt increases that possibly correspond to the seismic discontinuities at 410 and 660 km.

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