A new Phanerozoic carbonatite complex in southern West Greenland

The airborne radiometric survey carried out in 1975 and 1976 in West Greenland (Secher, 1976, 1977), was followed in 1977 by field work on the ground. Areas with anomalous high radioactivity, detected during the airborne work, were examined using helicopter and handborne scintillometers. Between the valleys Arnangarnup kua and Sarfartoq, 60 km SSW of Søndre Strømfjord Air Base, a cluster of anomalies were shown to be related to a conspicuous area of carbonatite rocks now referred to as the Sarfartoq carbonatite complex (fig. 18).