Geophysical and geological field work on fault structures at the Igaliko peninsula, South Greenland

Abstract

Uranium exploration carried out in South Greenland by the Syduran project in the last few years (Armour-Brown et al., 1981) has indicated that certain major E-W fauIt structures are features worthy of attention in this connection. During August 1982 geological and geophysical field work was carried out 10 km south-south-east of Igaliko (fig. 25) around a fauIt zone which had earlier given indications of the presence of uranium mineral occurrences. The object of the geological work was to map the surface within the geophysical grid and to make a gamma-radiation survey of the area. Pitchblende veins, found in connection with geochemical prospecting, were traced by trenching and were sampled. The object of the geophysical work was firstly to evaluate the usefulness of various electromagnetic methods for locating and mapping the structures in the Julianehåb granite which contain uranium minerals and secondly to evaluate the extent of the known uranium mineral occurrences. Logistic support was supplied by the Syduran project base camp at Dyrnes.