Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province
Studies of metamorphic rocks from the Daly Bay and Melville Peninsula areas of the Churchill Structural Province of the Canadian Shield have yielded two groups of directions. Group A directions (16 sites) from gneisses of basic and intermediate composition have the mean 196°, +55 °(N = 16, k = 39, α...
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Canadian Science Publishing
1973
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Online Access: | http://dx.doi.org/10.1139/e73-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/e73-093 |
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crcansciencepubl:10.1139/e73-093 2023-12-17T10:29:20+01:00 Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province Park, J. K. 1973 http://dx.doi.org/10.1139/e73-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/e73-093 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 10, issue 7, page 1079-1088 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1973 crcansciencepubl https://doi.org/10.1139/e73-093 2023-11-19T13:39:29Z Studies of metamorphic rocks from the Daly Bay and Melville Peninsula areas of the Churchill Structural Province of the Canadian Shield have yielded two groups of directions. Group A directions (16 sites) from gneisses of basic and intermediate composition have the mean 196°, +55 °(N = 16, k = 39, α 95 = 6.1°) with a corresponding pole at 12°N, 101°W (k = 27, α 95 = 7°). These rocks are foliated and the average effect of anisotropy on the high coercive force (stable) components is small. Evidence is presented to show that agewise the pole falls within the range of 1250 to 2100 m.y. The pole lies on the apparent polar wander curve for the Canadian Shield in the time range 1425 to 1725 m.y. which defines its age within narrower limits. Since the mean K–Ar age is 1622 ± 30 m.y., the magnetization of Group A may reflect this age. This result shows that metamorphic rocks can be used to provide useful paleomagnetic data. The Group B magnetization, however, derived mainly from acidic gneisses and having a mean direction of 055°, +72 °(N = 8, k = 18, α 95 = 13°) and a pole at 67°N, 009°W very close to the present pole, is probably of recent origin. Article in Journal/Newspaper Daly Bay Melville Peninsula Canadian Science Publishing (via Crossref) Daly ENVELOPE(63.761,63.761,-67.513,-67.513) Daly Bay ENVELOPE(-89.750,-89.750,64.001,64.001) Canadian Journal of Earth Sciences 10 7 1079 1088 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Park, J. K. Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province |
topic_facet |
General Earth and Planetary Sciences |
description |
Studies of metamorphic rocks from the Daly Bay and Melville Peninsula areas of the Churchill Structural Province of the Canadian Shield have yielded two groups of directions. Group A directions (16 sites) from gneisses of basic and intermediate composition have the mean 196°, +55 °(N = 16, k = 39, α 95 = 6.1°) with a corresponding pole at 12°N, 101°W (k = 27, α 95 = 7°). These rocks are foliated and the average effect of anisotropy on the high coercive force (stable) components is small. Evidence is presented to show that agewise the pole falls within the range of 1250 to 2100 m.y. The pole lies on the apparent polar wander curve for the Canadian Shield in the time range 1425 to 1725 m.y. which defines its age within narrower limits. Since the mean K–Ar age is 1622 ± 30 m.y., the magnetization of Group A may reflect this age. This result shows that metamorphic rocks can be used to provide useful paleomagnetic data. The Group B magnetization, however, derived mainly from acidic gneisses and having a mean direction of 055°, +72 °(N = 8, k = 18, α 95 = 13°) and a pole at 67°N, 009°W very close to the present pole, is probably of recent origin. |
format |
Article in Journal/Newspaper |
author |
Park, J. K. |
author_facet |
Park, J. K. |
author_sort |
Park, J. K. |
title |
Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province |
title_short |
Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province |
title_full |
Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province |
title_fullStr |
Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province |
title_full_unstemmed |
Paleomagnetism of Metamorphic Rocks of Daly Bay and Melville Peninsula, Churchill Structural Province |
title_sort |
paleomagnetism of metamorphic rocks of daly bay and melville peninsula, churchill structural province |
publisher |
Canadian Science Publishing |
publishDate |
1973 |
url |
http://dx.doi.org/10.1139/e73-093 http://www.nrcresearchpress.com/doi/pdf/10.1139/e73-093 |
long_lat |
ENVELOPE(63.761,63.761,-67.513,-67.513) ENVELOPE(-89.750,-89.750,64.001,64.001) |
geographic |
Daly Daly Bay |
geographic_facet |
Daly Daly Bay |
genre |
Daly Bay Melville Peninsula |
genre_facet |
Daly Bay Melville Peninsula |
op_source |
Canadian Journal of Earth Sciences volume 10, issue 7, page 1079-1088 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e73-093 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
10 |
container_issue |
7 |
container_start_page |
1079 |
op_container_end_page |
1088 |
_version_ |
1785581690488356864 |