The Qussuk gold prospect is located 40 km north of the Storø prospect in the Nuuk Fjord area of southwest Greenland and 70 km NNE of the capital city of Nuuk (Godthab). Gold in the Nuuk Fjord area is located in the strongly deformed and metamorphosed rocks of Archean age. The area is an extension of the North American Craton and is suggested to correlate with the Nain Region in Newfoundland and Labrador, Canada. The Qussuk area is located in the eastern most part of the Akia terrane (c. 3200 to 2975 Ma old), whereas the nearby Storø area is located in the Færingehavn terrane (c. 2826 to 2750 Ma old). The two terranes are separated by the Ivinnguit fault, a main structural element of the Nuuk Fjord Shear Zone. The supracrustal rocks in the Qussuk area are metamorphosed to amphibolite grade, deformed and comprise amphibolite, ultramafic rocks, aluminous gneiss tonalite and granite. Deformation is characterised by isoclinal folds which are upright to overturned; the rocks are trending NNE to SSW and are steeply dipping.
The contact between orthogneiss and amphibolite are interpreted as intrusive with the tonalitic orthogneiss intruding into amphibolite. Plagioclase-rich amphibolites containing biotite and hornblende are possibly of pyroclastic or volcaniclastic origin as suggested by primary textures such as graded bedding, fragmental textures and presence of fiammetextures. The observation of these primary volcanic textures and the presence of calc-alkaline and tholeiitic andesites at Qussuk lead Garde (2007) to the conclusion that these rocks represent an Achaean island arc complex and that gold was mineralized during a synvolcanic epithermal hydrothermal alteration event. It has however later been contended (Schlatter and Christensen, 2010) that gold is mineralized during an upper greenschistto lower amphibolite facies retrograde metamorphic event with potassium, silica and iron enrichment typical of orogenic gold deposits. It does however still remain unclear whether gold was remobilized by a post peak metamorphic event from an earlier, possibly syngenetic enrichment or introducedfrom an external source.
Since 2008, a total of 42 drill holes totaling 5,408 meters have been drilled following up on targets defined by surface reconnaissance and a SKYTEM geophysical survey. Selected intercepts from drilling at Qussuk comprise but are not limited to: 0.60m of 19.10g/t Au (DDH-1, Plateau), 1.50m of 5.92 g/t Au (DDH-3, Plateau), 1.10m of 12.60 g/t Au (DDH-14, Plateau), 2.00m of 2.95 g/t Au (DDH-28, Swan N), 2.00m of 4.56 g/t Au (DDH-30, Swan N) and 2.00m of 1.41 g/t Au (DDH-39, Alma).