Abstract
Gold exploration in the Godthåbsfjord region has been carried out since the early 1990s, and the region is now recognised as a gold province. Several prospects have been drilled and Storø is the most advanced project in the Færingehavn terrane. The gold occurrence at Storø is 2635 Ma old according to 207Pb/206Pb age determinations of metamorphic zircons associated with auriferous arsenopyrite (Nutman et al. 2007). Qussuk is located in the Akia terrane (Fig. 1), separated from the Færingehavn terrane in the south by the SW–NE-trending Ivinnguit fault. The Ivinnguit and Ataneq faults are spatially associated with several hydrothermal gold occurrences. From north to south these are: Isua, Storø, Bjørneøen, Sadelø, Store Malene and Qilanngaarsuit (Fig. 1; Appel et al. 2005; Kolb et al. 2009). The Qussuk prospect 20–25 km north of the Ataneq fault is 20 km long, 2–3 km wide, and divided from north to south into the ‘Swan N’, ‘Swan’ and ‘Plateau’ areas (Fig. 1).
Highlights
Gold exploration in the Godthåbsfjord region has been carried out since the early 1990s, and the region is recognised as a gold province
Garde (2007) showed that the rocks of the Qussuk area were formed in a volcanic-arc setting and that they were altered during a synvolcanic and epithermal hydrothermal alteration stage, and suggested that gold was introduced during this epithermal event
Gains of K2O (Fig. 3C) suggest that biotite formed as a result of hydrothermal alteration which is well known in orogenic gold systems (Eilu & Groves 2001; Groves et al 2003)
Summary
Gold exploration in the Godthåbsfjord region has been carried out since the early 1990s, and the region is recognised as a gold province. The gold occurrence at Storø is 2635 Ma old according to 207Pb/206Pb age determinations of metamorphic zircons associated with auriferous arsenopyrite (Nutman et al 2007). Qussuk is located in the Akia terrane (Fig. 1), separated from the Færingehavn terrane in the south by the SW–NE-trending Ivinnguit fault. The Ivinnguit and Ataneq faults are spatially associated with several hydrothermal gold occurrences. The Qussuk prospect 20–25 km north of the Ataneq fault is 20 km long, 2–3 km wide, and divided from north to south into the ‘Swan N’, ‘Swan’ and ‘Plateau’ areas (Fig. 1). This paper is directed towards helping gold exploration to be more efficient in the Qussuk area, in the larger Godthåbsfjord region and elsewhere in the Achaean greenstone belts of southern West Greenland
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