Uranium-bearing metasediment and granite in the Tasermiut area, South Greenland

Regional exploration for uranium was carried out in South Greenland in 1979 and 1980. From the planning stage the area between the fjords Tasermiut and Søndre Sermilik (fig. 16) was considered a favourable target beeause uranium deposits from geological environments of similar age, strueture and lithology are known, e.g. the Makkovik Bay area in Labrador (Gandhi et al., 1969; McMillan, 1976). The deposits sought were mainly pegmatitic or vein type deposits related to a Proterozoie unconformity (Nielsen, 1980). During the South Greenland uranium exploration project the area was covered in 1979 by a regional reconnaissance gamma-spectrometric survey and by drainage geochemistry (stream sediments and stream waters). Several areas of anomalous radioactivity were recordcd (Armour-Brown et al.) 1980), and an the basis af this and short field visits in 1979 ir was decided to undertake a more systematic follow-up in 1980. The preliminary results af this work are reported below.