K-Ar age determinations of the Alta-Kvænangen window rocks, northern Norway

K-Ar age determinations have heen made on ophiolitic material from the Alta-Kvænangen window. Isotopic dilution was also necessary for the potassium measurements. Minimum ages of 1.4 to 1.5 b.y. have been found. These ophiolites have thus a Precambrian age. A formation age of 1.8 to 2.0 b.y. is also...

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Bibliographic Details
Main Authors: Gautier, André M., Gulacar, Fazil, Delaloye, Michel
Format: Article in Journal/Newspaper
Language:English
Published: 1979
Subjects:
info:eu-repo/classification/ddc/550
Alta
Kvænangen
Norway
Northern Norway
Norvège septentrionale
Online Access:https://archive-ouverte.unige.ch/unige:163625
Description
Summary:K-Ar age determinations have heen made on ophiolitic material from the Alta-Kvænangen window. Isotopic dilution was also necessary for the potassium measurements. Minimum ages of 1.4 to 1.5 b.y. have been found. These ophiolites have thus a Precambrian age. A formation age of 1.8 to 2.0 b.y. is also probable. Une approche géochronométrique par la méthode K-Ar a été tentée sur les roches vertes de la fenêtre tectonique d'Alta-Kvænangen en Norvège septentrionale. Ces roches ont livré des âges minimum compris entre 1400 et 1500 m.a. confirmant l'âge Précambrien de ces séries ophiolitiques. On peut envisager un âge de formation de 1800-2000 m.a.

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