Reconnaissance geochemical exploration of map sheet 68 V. 2 (67°55' to 68°45'N, 50°15' to 52°45'W), West Greenland

The map sheet 68 V 2 has been covered by samples of stream sediment and water at a density of 1 sample site per c. 25 km² as part of the geochemical mapping programme of the Geological Survey of Greenland. The < 0.1 mm fraction of the sediment samples were analysed by X-ray fluorescence and instrumental neutron activation techniques and results are reported for 34 major and trace elements. The conductivity and fluoride content of the water samples were determined.

The results show that this part of the Archaean Laurentian shield which has been reworked during the Proterozoic has the geochemical signature of upper crust in agreement with common occurrences of supracrustal rocks in a basement dominated by infracrustal gneisses.

The economic potential is primarily associated with the supracrustal rock sequences and the anomaly patterns indicate mineralisation involving Au, As, Sb, Ba, Cu, Zn, U, and Fin zones where hydrothermal activity related to either intrusion of late granites and pegmatites or to intense shearing has affected the supracrustals.