Geological investigations on Dalagers Nunatakker, with special reference to metamorphosed basic dykes

Abstract

Geological mapping of a group of nunataks in the Frederikshåbs Isblink area (approximately 230 km²) has revealed different ages of metamorphosed basic dykes within the Precambrian gneisses. The dykes are small but are locally abundant and their presence provides an insight into the complex history of the gneisses. The nunataks are an extension of the pre-Ketilidian gneiss complex of the Frederikshåb area (see Jensen, 1966 and this report) and rock types mapped on the nunataks have much similarity to those of the Frederikshåb area.