U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland
Results of age determinations on zircons from samples of gneiss, granite, syenite and diorite from the Ketilidian mobile belt of South Greenland are presented. The lead isotopes were determined by a direct ionisation method. As three of the four zircon concentrates gave more or less discordant resul...
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Grønlands Geologiske Undersøgelse (København)
1971
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ftunivgeneve:oai:unige.ch:unige:151343 2023-05-15T16:26:33+02:00 U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland Chessex, Ronald Buchs, Armand Allaart, J.H. Delaloye, Michel Buttet, P. Landry, Jean-Claude 1971 https://archive-ouverte.unige.ch/unige:151343 eng eng Grønlands Geologiske Undersøgelse (København) unige:151343 https://archive-ouverte.unige.ch/unige:151343 info:eu-repo/semantics/openAccess info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/540 Text info:eu-repo/semantics/book Livre info:eu-repo/semantics/publishedVersion 1971 ftunivgeneve 2022-12-26T00:39:50Z Results of age determinations on zircons from samples of gneiss, granite, syenite and diorite from the Ketilidian mobile belt of South Greenland are presented. The lead isotopes were determined by a direct ionisation method. As three of the four zircon concentrates gave more or less discordant results, their interpretation is difficult. However, the data agree with the view that late Ketilidian granite emplacement took place roughly 1800 m.y. ago and not around 1600 m.y. age as the previously available K/Ar dates on pre-Gardar rocks seemed to indicate. Book Greenland Université de Genève: Archive ouverte UNIGE Greenland |
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Open Polar |
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Université de Genève: Archive ouverte UNIGE |
op_collection_id |
ftunivgeneve |
language |
English |
topic |
info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/540 |
spellingShingle |
info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/540 Chessex, Ronald Buchs, Armand Allaart, J.H. Delaloye, Michel Buttet, P. Landry, Jean-Claude U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland |
topic_facet |
info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/540 |
description |
Results of age determinations on zircons from samples of gneiss, granite, syenite and diorite from the Ketilidian mobile belt of South Greenland are presented. The lead isotopes were determined by a direct ionisation method. As three of the four zircon concentrates gave more or less discordant results, their interpretation is difficult. However, the data agree with the view that late Ketilidian granite emplacement took place roughly 1800 m.y. ago and not around 1600 m.y. age as the previously available K/Ar dates on pre-Gardar rocks seemed to indicate. |
format |
Book |
author |
Chessex, Ronald Buchs, Armand Allaart, J.H. Delaloye, Michel Buttet, P. Landry, Jean-Claude |
author_facet |
Chessex, Ronald Buchs, Armand Allaart, J.H. Delaloye, Michel Buttet, P. Landry, Jean-Claude |
author_sort |
Chessex, Ronald |
title |
U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland |
title_short |
U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland |
title_full |
U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland |
title_fullStr |
U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland |
title_full_unstemmed |
U-Pb isotopic ages of zircons from Precambrian rocks of South Greenland |
title_sort |
u-pb isotopic ages of zircons from precambrian rocks of south greenland |
publisher |
Grønlands Geologiske Undersøgelse (København) |
publishDate |
1971 |
url |
https://archive-ouverte.unige.ch/unige:151343 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
unige:151343 https://archive-ouverte.unige.ch/unige:151343 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766015487702990848 |