Some dolerite dykes in the southern part of the Godthaab district, West Greenland

Authors

  • Stig Bak Jensen

Abstract

The dykes described from the southern Godthaab district are all dolerites, which show varying degrees of uralitisation. The main minerals are plagioclase, pyroxene, uralite, and ore: olivine has only been found in one specimen from a dyke contact.

A study of samples collected at varying altitudes within the Grædefjord dyke and the Amitsuarssuk dyke (0-600 m and 365-1150 m respectively) indicates that no noteworthy differentiation has taken place during or after the intrusion.

The two dyke generations which in the field could be distinguished around Amitsuarssugssuaq are petrographically indistinguishable.

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Published

1962-02-15

How to Cite

Jensen, S. B. (1962). Some dolerite dykes in the southern part of the Godthaab district, West Greenland. Meddelelser Om Grønland, 169(4), 1–38. Retrieved from https://tidsskrift.dk/meddrgroenland/article/view/160426

Issue

Vol. 169 No. 4 (1962): Meddelelser om Grønland

Section

Artikler

License

Coypyright by the authors and the Commision for Scientific Research in Greenland. No parts of the publications may be reproduced in any form without the written permission by the copyright owners.