A geomagnetic induction anomaly from IMS data near Hudson Bay, and its relation to crustal electrical conductivity in central North America

Canadian geomagnetic data collected during the International Magnetospheric Study are used to investigate the terrestrial electrical conductivity structure of north-eastern Manitoba and part of the North-west Territories. The computed transfer functions resolve a major conductor trending east-west b...

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Bibliographic Details
Published in:Geophysical Journal International
Main Authors: Gupta, J. C., Kurtz, R. D., Camfield, P. A., Niblett, E. R.
Format: Text
Language:English
Published: Oxford University Press 1985
Subjects:
Articles
Hudson Bay
Hudson
Gillam
Online Access:http://gji.oxfordjournals.org/cgi/content/short/81/1/33
https://doi.org/10.1111/j.1365-246X.1985.tb01349.x
Description
Summary:Canadian geomagnetic data collected during the International Magnetospheric Study are used to investigate the terrestrial electrical conductivity structure of north-eastern Manitoba and part of the North-west Territories. The computed transfer functions resolve a major conductor trending east-west between the communities of Gillam and Back in Manitoba. Regional trends in the surface geology suggest that this conductor may be linked with the North American Central Plains electrical conductor. Two-dimensional modelling of the data suggests that the conductor dips to the north from a small depth beneath Gillam and may extend to the lowermost crust.

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