Preliminary report on K/Ar datings in the south-eastern part of the Ivigtut region

Abstract

In the lvigtut region the Ketilidian supracrustal rocks are exposed mainly on Arsuk ø and in a narrow belt stretching along the margin of the Inland lee (Berthelsen & Noe-Nygaard, 1965; Windley et al., 1966). This belt narrows to less than 1 km along the north side of Qôrnoq fjord. The metamorphic grade of the supracrustal rocks increases southwards from lower greenschist facies in northern Grænseland and on Midternæs to epidote amphibolite facies around Qôrnoq fjord and Kiniilik.