Gneisses in the vicinity of Fiskenæsset; some preliminary observations

Abstract

This report describes some preliminary observations, arising out ofdetailed work, that pertain to one of the major problems of the Fiskenæsset region: the relationship between granulite-grade pyroxene-bearing gneisses and biotite gneisses that appear to be almost entirely of amphibolite' grade. Previously little detailed work has been done on the gneisses in the vicinity of Fiskenæsset where most attention has been focused on the metaanorthosite complex. Impressions gained by Windley (1969, 1972) from reconnaissance mapping not only around Fiskenæsset but also in areas to the north and south have become firmly entrenched in the literature. In an unpublished thesis, Herd (1972) provided a brief summary of the gneisses based on study of a limited number of thin sections of samples from the Fiskenæsset area.