Early Precambrian Rocks of Granitic Composition
The granitoids and the corresponding gneisses of the old sialic crust are not exclusively represented by rocks of tonalitic and granodioritic composition. Potassium-rich rocks of true granitic composition occur even in the oldest known complexes of the Earth's crust.The petrography of six sampl...
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Canadian Science Publishing
1975
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Online Access: | http://dx.doi.org/10.1139/e75-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-121 |
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crcansciencepubl:10.1139/e75-121 2023-12-17T10:30:57+01:00 Early Precambrian Rocks of Granitic Composition Krupicka, J. 1975 http://dx.doi.org/10.1139/e75-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-121 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 12, issue 8, page 1307-1315 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1975 crcansciencepubl https://doi.org/10.1139/e75-121 2023-11-19T13:38:34Z The granitoids and the corresponding gneisses of the old sialic crust are not exclusively represented by rocks of tonalitic and granodioritic composition. Potassium-rich rocks of true granitic composition occur even in the oldest known complexes of the Earth's crust.The petrography of six samples (39 individual specimens) from the southwestern part of the Early Precambrian Amitsoq gneiss complex in the Godthaab area in Greenland, collected for dating purposes, and of 12 Early Precambrian granitoid pebbles from the basal Moodies conglomerate in South Africa shows that (a) half of the investigated samples of the Amitsoq gneiss, and (b) ten of the Moodies granitoid pebbles are rocks of true granitic composition. The rocks show no evidence of sedimentogenic origin. Article in Journal/Newspaper Greenland Canadian Science Publishing (via Crossref) Greenland Canadian Journal of Earth Sciences 12 8 1307 1315 |
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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 Krupicka, J. Early Precambrian Rocks of Granitic Composition |
topic_facet |
General Earth and Planetary Sciences |
description |
The granitoids and the corresponding gneisses of the old sialic crust are not exclusively represented by rocks of tonalitic and granodioritic composition. Potassium-rich rocks of true granitic composition occur even in the oldest known complexes of the Earth's crust.The petrography of six samples (39 individual specimens) from the southwestern part of the Early Precambrian Amitsoq gneiss complex in the Godthaab area in Greenland, collected for dating purposes, and of 12 Early Precambrian granitoid pebbles from the basal Moodies conglomerate in South Africa shows that (a) half of the investigated samples of the Amitsoq gneiss, and (b) ten of the Moodies granitoid pebbles are rocks of true granitic composition. The rocks show no evidence of sedimentogenic origin. |
format |
Article in Journal/Newspaper |
author |
Krupicka, J. |
author_facet |
Krupicka, J. |
author_sort |
Krupicka, J. |
title |
Early Precambrian Rocks of Granitic Composition |
title_short |
Early Precambrian Rocks of Granitic Composition |
title_full |
Early Precambrian Rocks of Granitic Composition |
title_fullStr |
Early Precambrian Rocks of Granitic Composition |
title_full_unstemmed |
Early Precambrian Rocks of Granitic Composition |
title_sort |
early precambrian rocks of granitic composition |
publisher |
Canadian Science Publishing |
publishDate |
1975 |
url |
http://dx.doi.org/10.1139/e75-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-121 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Canadian Journal of Earth Sciences volume 12, issue 8, page 1307-1315 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e75-121 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
12 |
container_issue |
8 |
container_start_page |
1307 |
op_container_end_page |
1315 |
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1785584074453155840 |