Geological reconnaissance of the Precambrian rocks of south-east Greenland

Abstract

The Precambrian of SE Greenland can be divided into three main structural units; a northern block affected by the eastern continuation of the Nagssugtoqidian orogeny; a southern block affected by the Ketilidian orogeny; and a central block of gneisses unaffected by these younger events. The boundaries of the younger orogenies can be seen in the field by their effect on basic dyke swarms intruded into the older basement. With the exception of younger intrusive complexes, the rocks so far mapped within the two younger orogenic complexes in this part of Greenland are all derived from an older basement.