A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada
Geomagnetic depth-sounding data have been obtained along a profile across the northern Yukon and the Mackenzie Delta region that approximately parallels the east–west flow of the auroral electrojets near the geomagnetic latitude of 70°N. An internal conductive zone, in which electric currents are co...
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Language: | English |
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Canadian Science Publishing
1981
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Online Access: | http://dx.doi.org/10.1139/e81-104 http://www.nrcresearchpress.com/doi/pdf/10.1139/e81-104 |
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crcansciencepubl:10.1139/e81-104 2023-12-17T10:33:14+01:00 A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada DeLaurier, Jon M. Plet, F. C. Drury, M. J. 1981 http://dx.doi.org/10.1139/e81-104 http://www.nrcresearchpress.com/doi/pdf/10.1139/e81-104 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 18, issue 6, page 1092-1100 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1981 crcansciencepubl https://doi.org/10.1139/e81-104 2023-11-19T13:39:29Z Geomagnetic depth-sounding data have been obtained along a profile across the northern Yukon and the Mackenzie Delta region that approximately parallels the east–west flow of the auroral electrojets near the geomagnetic latitude of 70°N. An internal conductive zone, in which electric currents are confined to a north–south direction, is defined by the large spatial variation of the vertical component of the time-varying geomagnetic field and of the horizontal component parallel to the profile. This conductive zone, with a half width of about 50 km, correlates with the Blow Trough, an element of the Beaufort–Mackenzie Basin, that contains at least 5 km of Mesozoic and Cenozoic clastic sediments. Model studies suggest that up to 10 km of conducting sedimentary materials occur within a basin-shaped structure and that a conducting zone (20 km wide) extends this basin to a depth of 20 km in the Earth's crust. This deeper conducting zone could be the result of movements along the Rapid Fault array, which dissects the Blow Trough and which may have fractured the materials beneath the basin or displaced sedimentary masses to greater depths. The observed negative Bouguer gravity anomaly is consistent with such a structure. Article in Journal/Newspaper Mackenzie Basin Mackenzie Delta Yukon Canadian Science Publishing (via Crossref) Yukon Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Canadian Journal of Earth Sciences 18 6 1092 1100 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences DeLaurier, Jon M. Plet, F. C. Drury, M. J. A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Geomagnetic depth-sounding data have been obtained along a profile across the northern Yukon and the Mackenzie Delta region that approximately parallels the east–west flow of the auroral electrojets near the geomagnetic latitude of 70°N. An internal conductive zone, in which electric currents are confined to a north–south direction, is defined by the large spatial variation of the vertical component of the time-varying geomagnetic field and of the horizontal component parallel to the profile. This conductive zone, with a half width of about 50 km, correlates with the Blow Trough, an element of the Beaufort–Mackenzie Basin, that contains at least 5 km of Mesozoic and Cenozoic clastic sediments. Model studies suggest that up to 10 km of conducting sedimentary materials occur within a basin-shaped structure and that a conducting zone (20 km wide) extends this basin to a depth of 20 km in the Earth's crust. This deeper conducting zone could be the result of movements along the Rapid Fault array, which dissects the Blow Trough and which may have fractured the materials beneath the basin or displaced sedimentary masses to greater depths. The observed negative Bouguer gravity anomaly is consistent with such a structure. |
format |
Article in Journal/Newspaper |
author |
DeLaurier, Jon M. Plet, F. C. Drury, M. J. |
author_facet |
DeLaurier, Jon M. Plet, F. C. Drury, M. J. |
author_sort |
DeLaurier, Jon M. |
title |
A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada |
title_short |
A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada |
title_full |
A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada |
title_fullStr |
A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada |
title_full_unstemmed |
A geomagnetic depth sounding profile across the northern Yukon and the Mackenzie Delta region, Canada |
title_sort |
geomagnetic depth sounding profile across the northern yukon and the mackenzie delta region, canada |
publisher |
Canadian Science Publishing |
publishDate |
1981 |
url |
http://dx.doi.org/10.1139/e81-104 http://www.nrcresearchpress.com/doi/pdf/10.1139/e81-104 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Yukon Canada Mackenzie Delta |
geographic_facet |
Yukon Canada Mackenzie Delta |
genre |
Mackenzie Basin Mackenzie Delta Yukon |
genre_facet |
Mackenzie Basin Mackenzie Delta Yukon |
op_source |
Canadian Journal of Earth Sciences volume 18, issue 6, page 1092-1100 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e81-104 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
18 |
container_issue |
6 |
container_start_page |
1092 |
op_container_end_page |
1100 |
_version_ |
1785587163736309760 |