Granitisation of basic rocks in the Bjørnesund area, near Fiskenæsset, West Greenland

Abstract

The area studied (Fig. 22) is dominantly composed of strongly and poorly banded gneisses with intercalated supracrustal amphibolites, and was finally metamorphosed in upper-amphibolite facies about 2.7 x 10^9 y ago. Early large-scale isoclinal folds formed during high-grade metamorphism have affected the strongly banded gneisses and amphibolites, but predate the younger, poorly banded gneisses, which were subsequently deformed and metamorphosed along with the banded gneisses and amphibolites. (Williams, 1973).