Field evidence concerning the origin of early Precambrian gneisses and amphibolites in part of the Fiskenæsset region

Abstract

During GGU's first season of detailed mapping in the Fiskenæsset region south of Midgård in 1970, "the origin of the gneisses" . . . was "much under debate" and it was concluded that "there is little evidence on which to decide whether they represent old granitic rocks or (in part) old metasediments" (Kalsbeek, 1971). In 1971, GGU's mapping on a scale of 1:20 000 was extended to the north-east of Midgård where, in an area of 100 square kilometres north of the head of Fiskenæsfjorden (fig. 3), it has been found that the gneisses are divisible into three main groups.