Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories
Two alkaline igneous complexes and three lines of diatreme breccias were emplaced in the East Arm of Great Slave Lake during the lower Proterozoic. Field relationships suggest that those rocks are broadly cogenetic and were emplaced about 2.1 Ga ago.One of the intrusions, the Easter Island dyke, was...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1979
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e79-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-006 |
id |
crcansciencepubl:10.1139/e79-006 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e79-006 2024-09-15T18:08:13+00:00 Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories Badham, J. P. N. 1979 http://dx.doi.org/10.1139/e79-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-006 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 16, issue 1, page 60-72 ISSN 0008-4077 1480-3313 journal-article 1979 crcansciencepubl https://doi.org/10.1139/e79-006 2024-07-25T04:10:06Z Two alkaline igneous complexes and three lines of diatreme breccias were emplaced in the East Arm of Great Slave Lake during the lower Proterozoic. Field relationships suggest that those rocks are broadly cogenetic and were emplaced about 2.1 Ga ago.One of the intrusions, the Easter Island dyke, was rotated subsequent to emplacement such that both top and bottom are now exposed. Field and petrographic data are indicative of progressive differentiation along (i.e., up) the dyke and are substantiated by chemical data. The differentiation history of the early gabbros of the Blachford Lake complex is similar. Late differentiates of both complexes closely resemble the igneous matrices of the breccias and petrographic and chemical data support the proposal of cogenesis and contemporaneity.The field data show that there was a period of significant faulting and concomitant alkaline igneous activity in the East Arm area in the lower Proterozoic. Article in Journal/Newspaper Great Slave Lake Northwest Territories Canadian Science Publishing Canadian Journal of Earth Sciences 16 1 60 72 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Two alkaline igneous complexes and three lines of diatreme breccias were emplaced in the East Arm of Great Slave Lake during the lower Proterozoic. Field relationships suggest that those rocks are broadly cogenetic and were emplaced about 2.1 Ga ago.One of the intrusions, the Easter Island dyke, was rotated subsequent to emplacement such that both top and bottom are now exposed. Field and petrographic data are indicative of progressive differentiation along (i.e., up) the dyke and are substantiated by chemical data. The differentiation history of the early gabbros of the Blachford Lake complex is similar. Late differentiates of both complexes closely resemble the igneous matrices of the breccias and petrographic and chemical data support the proposal of cogenesis and contemporaneity.The field data show that there was a period of significant faulting and concomitant alkaline igneous activity in the East Arm area in the lower Proterozoic. |
format |
Article in Journal/Newspaper |
author |
Badham, J. P. N. |
spellingShingle |
Badham, J. P. N. Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories |
author_facet |
Badham, J. P. N. |
author_sort |
Badham, J. P. N. |
title |
Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories |
title_short |
Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories |
title_full |
Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories |
title_fullStr |
Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories |
title_full_unstemmed |
Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories |
title_sort |
geology and petrochemistry of lower aphebian (2.4–2.0 ga) alkaline plutonic and hypabyssal rocks in the east arm of great slave lake, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1979 |
url |
http://dx.doi.org/10.1139/e79-006 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-006 |
genre |
Great Slave Lake Northwest Territories |
genre_facet |
Great Slave Lake Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 16, issue 1, page 60-72 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e79-006 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
16 |
container_issue |
1 |
container_start_page |
60 |
op_container_end_page |
72 |
_version_ |
1810445558725214208 |