Open AccessElectrical resistivity structure beneath the North‐west Atlantic Ocean
Author(s) -
Poehls K. A.,
Herzen R. P. Von
Publication year - 1976
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1976.tb01276.x
Subject(s) - geology , electrical resistivity and conductivity , earth's magnetic field , structural basin , geophysics , paleontology , magnetic field , physics , quantum mechanics , electrical engineering , engineering
Summary Geomagnetic variations recorded on the deep sea floor of the North‐west Atlantic basin have been combined with simultaneous data recorded at nearby land stations to deduce the electrical resistivity structure to depths of several hundred kilometres. Over a period interval between about 30 min and one day, vertical gradients of the geomagnetic field variations are simply interpreted as induction from a plane two‐layer structure with resistivity of about 7–20 Ω m in the upper 100 km, increasing to > 20 Ω m below. The lack of suitable high‐frequency data precluded resolution of structures within the upper 30–50 km. The resistivity value implied for depths below 100 km is comparable to that deduced from similar studies in the Pacific Ocean basin.