Reconnaissance K/Ar dating of samples from West Greenland between Søndre Strømfjord and Frederikshåb Isblink

Authors

  • O Larsen

DOI:

https://doi.org/10.34194/rapggu.v35.7265

Abstract

2860 ± 20 m.y. biotite, GGU 92133. Epidote gneiss (Finnefjæld gneiss), north of Ilivilik point, east of Napassoq. 65°04'N, 52°15'W. This sample represents the typical Finnefjæld gneiss. It is a medium-grained quartz-plagioclase-epidote gneiss with biotite and green hornblende. Microline has been identified as a minor component. Both feldspars are heavily twinned and quartz grains show polygonisation. Biotite, hornblende and epidote are intimately intergrown indicating that the rock has not reached full equilibrium after deformation. Sphene, apatite and opaque ore are all common accessories.

Cover image for volume 35

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Published

1971-01-01

How to Cite

Larsen, O. (1971). Reconnaissance K/Ar dating of samples from West Greenland between Søndre Strømfjord and Frederikshåb Isblink. Rapport Grønlands Geologiske Undersøgelse, 35, 44–48. https://doi.org/10.34194/rapggu.v35.7265

Issue

Vol. 35 (1971): Report of activities, 1970

Section

Article

License

This article is distributed under a CC-BY 4.0 licence, permitting free redistribution and reproduction for any purpose, even commercial, provided proper citation of the original work. Author(s) retain copyright over the article contents.