Remanent magnetic directions of some dykes from southern West Greenland

Abstract

During the summer of 1965 Survey geologists collected 57 oriented samples from 25 dykes for palaeomagnetic investigations. The main problem was to see if palaeomagnetic methods could be used to distinguish dyke swarms of different ages. Of the 25 dykes, two were thought to be "Trap Diabase" (TD) dykes of late Phanerozoic age and seven dykes were thought to be Gardar in age (ca. 1100 m.y.); the other dykes were all of uncertain age.