Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland
In the Fiskenaesset region (West Greenland), there are three generations of postorogenic doleritic dikes of tholeiitic affinity. Two types of differentiation are evident: (a) laterally from the contacts to center and vertically, with the upper centres of the youngest generation of dikes attaining an...
Published in: | Canadian Journal of Earth Sciences |
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Language: | English |
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Canadian Science Publishing
1975
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Online Access: | http://dx.doi.org/10.1139/e75-063 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-063 |
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crcansciencepubl:10.1139/e75-063 2024-09-15T18:09:01+00:00 Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland Rivalenti, Giorgio 1975 http://dx.doi.org/10.1139/e75-063 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-063 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 12, issue 5, page 721-730 ISSN 0008-4077 1480-3313 journal-article 1975 crcansciencepubl https://doi.org/10.1139/e75-063 2024-07-25T04:10:03Z In the Fiskenaesset region (West Greenland), there are three generations of postorogenic doleritic dikes of tholeiitic affinity. Two types of differentiation are evident: (a) laterally from the contacts to center and vertically, with the upper centres of the youngest generation of dikes attaining an andesitic or rhyolitic composition; and (b) between the different generations of dikes.Major and trace element geochemistry and calculations of the cumulus composition indicate that the differentiation within dikes is due not to flow, but to a shallow crustal fractionation of an olivine tholeiite magma. The differentiation between the various generations is attributed to fractionation of an olivine tholeiite magma during its upward displacement from a deep crustal magma chamber. Article in Journal/Newspaper Greenland Canadian Science Publishing Canadian Journal of Earth Sciences 12 5 721 730 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
In the Fiskenaesset region (West Greenland), there are three generations of postorogenic doleritic dikes of tholeiitic affinity. Two types of differentiation are evident: (a) laterally from the contacts to center and vertically, with the upper centres of the youngest generation of dikes attaining an andesitic or rhyolitic composition; and (b) between the different generations of dikes.Major and trace element geochemistry and calculations of the cumulus composition indicate that the differentiation within dikes is due not to flow, but to a shallow crustal fractionation of an olivine tholeiite magma. The differentiation between the various generations is attributed to fractionation of an olivine tholeiite magma during its upward displacement from a deep crustal magma chamber. |
format |
Article in Journal/Newspaper |
author |
Rivalenti, Giorgio |
spellingShingle |
Rivalenti, Giorgio Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland |
author_facet |
Rivalenti, Giorgio |
author_sort |
Rivalenti, Giorgio |
title |
Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland |
title_short |
Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland |
title_full |
Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland |
title_fullStr |
Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland |
title_full_unstemmed |
Chemistry and Differentiation of Mafic Dikes in an area near Fiskenaesset, West Greenland |
title_sort |
chemistry and differentiation of mafic dikes in an area near fiskenaesset, west greenland |
publisher |
Canadian Science Publishing |
publishDate |
1975 |
url |
http://dx.doi.org/10.1139/e75-063 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-063 |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Canadian Journal of Earth Sciences volume 12, issue 5, page 721-730 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e75-063 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
12 |
container_issue |
5 |
container_start_page |
721 |
op_container_end_page |
730 |
_version_ |
1810446395918778368 |