Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories
An early tectono-stratigraphic and late plutonic assemblage are distinguished in the central part of the Archean Slave Province (Contwoyto Lake area) on the basis of their relationship to deformation and metamorphic episodes, and by geochemical characteristics. The older assemblage, which predates t...
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1992
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Online Access: | http://dx.doi.org/10.1139/e92-171 http://www.nrcresearchpress.com/doi/pdf/10.1139/e92-171 |
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crcansciencepubl:10.1139/e92-171 2024-04-07T07:51:54+00:00 Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories King, J. E. Davis, W. J. Relf, C. 1992 http://dx.doi.org/10.1139/e92-171 http://www.nrcresearchpress.com/doi/pdf/10.1139/e92-171 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 29, issue 10, page 2156-2170 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1992 crcansciencepubl https://doi.org/10.1139/e92-171 2024-03-08T00:37:51Z An early tectono-stratigraphic and late plutonic assemblage are distinguished in the central part of the Archean Slave Province (Contwoyto Lake area) on the basis of their relationship to deformation and metamorphic episodes, and by geochemical characteristics. The older assemblage, which predates the onset of intense deformation and the thermal peak of metamorphism, comprises 2.68–2.65 Ga calc-alkaline volcanic and plutonic rocks, as well as extensive turbidites. The younger assemblage comprises ca. 2.61–2.58 Ga plutonic units that were emplaced during and after deformation (D,–D 3 ) and the thermal peak of metamorphism. Compositions of the late plutonic units vary systematically with time of intrusion from an early, calc-alkaline, diorite – tonalite suite to late peraluminous granites. The early assemblage is interpreted to represent remnants of an island arc (or arcs) overlain by turbidites and accreted during D 1 and D 2 . The later assemblage is interpreted as a product of late- to post-accretion, suprasubduction-zone magmatism and associated crustal melting. Article in Journal/Newspaper Contwoyto Lake Northwest Territories Canadian Science Publishing Northwest Territories Contwoyto Lake ENVELOPE(-110.717,-110.717,65.650,65.650) Canadian Journal of Earth Sciences 29 10 2156 2170 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences King, J. E. Davis, W. J. Relf, C. Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories |
topic_facet |
General Earth and Planetary Sciences |
description |
An early tectono-stratigraphic and late plutonic assemblage are distinguished in the central part of the Archean Slave Province (Contwoyto Lake area) on the basis of their relationship to deformation and metamorphic episodes, and by geochemical characteristics. The older assemblage, which predates the onset of intense deformation and the thermal peak of metamorphism, comprises 2.68–2.65 Ga calc-alkaline volcanic and plutonic rocks, as well as extensive turbidites. The younger assemblage comprises ca. 2.61–2.58 Ga plutonic units that were emplaced during and after deformation (D,–D 3 ) and the thermal peak of metamorphism. Compositions of the late plutonic units vary systematically with time of intrusion from an early, calc-alkaline, diorite – tonalite suite to late peraluminous granites. The early assemblage is interpreted to represent remnants of an island arc (or arcs) overlain by turbidites and accreted during D 1 and D 2 . The later assemblage is interpreted as a product of late- to post-accretion, suprasubduction-zone magmatism and associated crustal melting. |
format |
Article in Journal/Newspaper |
author |
King, J. E. Davis, W. J. Relf, C. |
author_facet |
King, J. E. Davis, W. J. Relf, C. |
author_sort |
King, J. E. |
title |
Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories |
title_short |
Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories |
title_full |
Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories |
title_fullStr |
Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories |
title_full_unstemmed |
Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories |
title_sort |
late archean tectono-magmatic evolution of the central slave province, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/e92-171 http://www.nrcresearchpress.com/doi/pdf/10.1139/e92-171 |
long_lat |
ENVELOPE(-110.717,-110.717,65.650,65.650) |
geographic |
Northwest Territories Contwoyto Lake |
geographic_facet |
Northwest Territories Contwoyto Lake |
genre |
Contwoyto Lake Northwest Territories |
genre_facet |
Contwoyto Lake Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 29, issue 10, page 2156-2170 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e92-171 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
29 |
container_issue |
10 |
container_start_page |
2156 |
op_container_end_page |
2170 |
_version_ |
1795667013835685888 |