Electrical resistivity structure beneath the North-west Atlantic Ocean
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 on...
| Published in: | Geophysical Journal International |
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| Main Authors: | , |
| Format: | Text |
| Language: | English |
| Published: |
Oxford University Press
1976
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| Subjects: | |
| Online Access: | http://gji.oxfordjournals.org/cgi/content/short/47/2/331 https://doi.org/10.1111/j.1365-246X.1976.tb01276.x |
| 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. |
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