Field work between Tunugdliarfik and Tasiussaq

Abstract

Major sinistral transcurrent fauIts cut the Igaliko nepheline syenites and associated dykes between Tunugdliarfik and Qoroq, and east of Qoroq (Emeleus & Harry, in press, plate 4). Investigations by V. Poulsen, H. G. Scharbert and J. W. Stewart have shown that the Gardar dykes and earlier rocks are extensively faulted in a zone about 5 km wide, striking approximately east-west between Tunugdliarfik and Tasiussaq (fig. 3). In 1969 field work was undertaken to see whether it was possibie to correlate the fauIts near Qagssiarssuk with those affecting the nepheline syenites of the South Qoroq Centre and the associated dykes. Some additional observations were also made an the dyke swarm south-west of Qagssiarssuk.