Paleomagnetic evidence for the extent of Mackenzie igneous events
North-northwesterly striking Mackenzie diabase dikes of middle-Proterozoic (Helikian) age are profuse in the western part of the Canadian Shield. Published paleomagnetic data on dikes of this trend in Mackenzie District, on the Muskox Intrusion, the Coppermine River volcanic rocks, and the Sudbury d...
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Canadian Science Publishing
1969
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crcansciencepubl:10.1139/e69-065 2024-09-15T18:02:51+00:00 Paleomagnetic evidence for the extent of Mackenzie igneous events Fahrig, W. F. Jones, D. L. 1969 http://dx.doi.org/10.1139/e69-065 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-065 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 6, issue 4, page 679-688 ISSN 0008-4077 1480-3313 journal-article 1969 crcansciencepubl https://doi.org/10.1139/e69-065 2024-08-01T04:10:03Z North-northwesterly striking Mackenzie diabase dikes of middle-Proterozoic (Helikian) age are profuse in the western part of the Canadian Shield. Published paleomagnetic data on dikes of this trend in Mackenzie District, on the Muskox Intrusion, the Coppermine River volcanic rocks, and the Sudbury dikes suggest that they are all products of closely related igneous events. This paper presents paleomagnetic data that suggest that the intrusion of extensive diabase sheets in the East Arm of Great Slave Lake, and of dikes as far to the northeast as Melville Peninsula and as far to the southeast as Manitoba, were also parts of these events. The mean paleomagnetic pole position for the Mackenzie dikes and for related intrusive and extrusive rocks is [Formula: see text], 171 °W with [Formula: see text]. Radioactive age determinations, some of which are unpublished, indicate an age of about 1200 m.y. for the formation of these rocks. It is suggested that for convenience all of these apparently related intrusive and extrusive igneous episodes be referred to as Mackenzie igneous events. Article in Journal/Newspaper Coppermine River Great Slave Lake Melville Peninsula muskox Canadian Science Publishing Canadian Journal of Earth Sciences 6 4 679 688 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
North-northwesterly striking Mackenzie diabase dikes of middle-Proterozoic (Helikian) age are profuse in the western part of the Canadian Shield. Published paleomagnetic data on dikes of this trend in Mackenzie District, on the Muskox Intrusion, the Coppermine River volcanic rocks, and the Sudbury dikes suggest that they are all products of closely related igneous events. This paper presents paleomagnetic data that suggest that the intrusion of extensive diabase sheets in the East Arm of Great Slave Lake, and of dikes as far to the northeast as Melville Peninsula and as far to the southeast as Manitoba, were also parts of these events. The mean paleomagnetic pole position for the Mackenzie dikes and for related intrusive and extrusive rocks is [Formula: see text], 171 °W with [Formula: see text]. Radioactive age determinations, some of which are unpublished, indicate an age of about 1200 m.y. for the formation of these rocks. It is suggested that for convenience all of these apparently related intrusive and extrusive igneous episodes be referred to as Mackenzie igneous events. |
format |
Article in Journal/Newspaper |
author |
Fahrig, W. F. Jones, D. L. |
spellingShingle |
Fahrig, W. F. Jones, D. L. Paleomagnetic evidence for the extent of Mackenzie igneous events |
author_facet |
Fahrig, W. F. Jones, D. L. |
author_sort |
Fahrig, W. F. |
title |
Paleomagnetic evidence for the extent of Mackenzie igneous events |
title_short |
Paleomagnetic evidence for the extent of Mackenzie igneous events |
title_full |
Paleomagnetic evidence for the extent of Mackenzie igneous events |
title_fullStr |
Paleomagnetic evidence for the extent of Mackenzie igneous events |
title_full_unstemmed |
Paleomagnetic evidence for the extent of Mackenzie igneous events |
title_sort |
paleomagnetic evidence for the extent of mackenzie igneous events |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/e69-065 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-065 |
genre |
Coppermine River Great Slave Lake Melville Peninsula muskox |
genre_facet |
Coppermine River Great Slave Lake Melville Peninsula muskox |
op_source |
Canadian Journal of Earth Sciences volume 6, issue 4, page 679-688 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e69-065 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
6 |
container_issue |
4 |
container_start_page |
679 |
op_container_end_page |
688 |
_version_ |
1810440252798533632 |