Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada
Crustal magnetic anomaly data from the Orbiting Geophysical Observatories 2, 4, and 6 (Pogo) satellites are compared with upward-continued aeromagnetic data between 50–85°N latitude and 220–260°E longitude. Agreement is good, both in anomaly location and in amplitude, giving confidence that it is po...
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Language: | English |
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Canadian Science Publishing
1980
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Online Access: | http://dx.doi.org/10.1139/e80-086 http://www.nrcresearchpress.com/doi/pdf/10.1139/e80-086 |
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crcansciencepubl:10.1139/e80-086 2024-05-19T07:28:09+00:00 Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada Langel, R. A. Coles, R. L. Mayhew, M. A. 1980 http://dx.doi.org/10.1139/e80-086 http://www.nrcresearchpress.com/doi/pdf/10.1139/e80-086 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 17, issue 7, page 876-887 ISSN 0008-4077 1480-3313 journal-article 1980 crcansciencepubl https://doi.org/10.1139/e80-086 2024-05-02T06:51:25Z Crustal magnetic anomaly data from the Orbiting Geophysical Observatories 2, 4, and 6 (Pogo) satellites are compared with upward-continued aeromagnetic data between 50–85°N latitude and 220–260°E longitude. Agreement is good, both in anomaly location and in amplitude, giving confidence that it is possible to proceed with the derivation and interpretation of satellite anomaly maps in all parts of the globe. The data contain a magnetic high over the Alpha ridge suggesting continental composition and a magnetic low over the southern Canada basin and northern Canadian Arctic Islands (Sverdrup basin). The low in the Sverdrup basin corresponds to a region of high heat flow, suggesting a shallow Curie isotherm. A ridge of high field, with two distinct peaks in amplitude, is found over the northern portion of the platform deposits and a relative high is located in the central portion of the Churchill Province. No features are present to indicate a magnetic boundary between Slave and Bear Provinces, but a trend change is evident between Slave and Churchill Provinces. South of 60° latitude a broad magnetic low is located over very thick (40–50 km) crust, interpreted to be a region of low magnetization. Article in Journal/Newspaper alpha ridge Arctic canada basin sverdrup basin Canadian Science Publishing Canadian Journal of Earth Sciences 17 7 876 887 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Crustal magnetic anomaly data from the Orbiting Geophysical Observatories 2, 4, and 6 (Pogo) satellites are compared with upward-continued aeromagnetic data between 50–85°N latitude and 220–260°E longitude. Agreement is good, both in anomaly location and in amplitude, giving confidence that it is possible to proceed with the derivation and interpretation of satellite anomaly maps in all parts of the globe. The data contain a magnetic high over the Alpha ridge suggesting continental composition and a magnetic low over the southern Canada basin and northern Canadian Arctic Islands (Sverdrup basin). The low in the Sverdrup basin corresponds to a region of high heat flow, suggesting a shallow Curie isotherm. A ridge of high field, with two distinct peaks in amplitude, is found over the northern portion of the platform deposits and a relative high is located in the central portion of the Churchill Province. No features are present to indicate a magnetic boundary between Slave and Bear Provinces, but a trend change is evident between Slave and Churchill Provinces. South of 60° latitude a broad magnetic low is located over very thick (40–50 km) crust, interpreted to be a region of low magnetization. |
format |
Article in Journal/Newspaper |
author |
Langel, R. A. Coles, R. L. Mayhew, M. A. |
spellingShingle |
Langel, R. A. Coles, R. L. Mayhew, M. A. Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada |
author_facet |
Langel, R. A. Coles, R. L. Mayhew, M. A. |
author_sort |
Langel, R. A. |
title |
Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada |
title_short |
Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada |
title_full |
Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada |
title_fullStr |
Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada |
title_full_unstemmed |
Comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western Canada |
title_sort |
comparisons of magnetic anomalies of lithospheric origin measured by satellite and airborne magnetometers over western canada |
publisher |
Canadian Science Publishing |
publishDate |
1980 |
url |
http://dx.doi.org/10.1139/e80-086 http://www.nrcresearchpress.com/doi/pdf/10.1139/e80-086 |
genre |
alpha ridge Arctic canada basin sverdrup basin |
genre_facet |
alpha ridge Arctic canada basin sverdrup basin |
op_source |
Canadian Journal of Earth Sciences volume 17, issue 7, page 876-887 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e80-086 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
17 |
container_issue |
7 |
container_start_page |
876 |
op_container_end_page |
887 |
_version_ |
1799471506272550912 |