The Troutline Creek occurrence is located near Troutline Creek, south of Mount McDame, and approximately 92 kilometres north of the community of Dease Lake.

Regionally, the area is underlain by quartz arenite sedimentary rocks of the Lower Cambrian Boya Formation (Atan Group), limestone, marble and calcareous sedimentary rocks of the Lower Cambrian Rosella Formation (Atan Group), limestone, slate, siltstone and argillite of the Ordovician to Silurian Road River Group, calcareous sedimentary rocks of the McDame Group, fine clastic sedimentary rocks of the Upper Devonian to Lower Mississippian Earn Group and basaltic volcanic rocks of the Mississippian Slide Mountain Complex. Granitic intrusive rocks of the Lower Cretaceous Cassiar Batholith are exposed to the west.

Geological Survey of Canada Map 1110A indicates a copper occurrence in Upper Paleozoic Sylvester Allochthon (Mississippian Slide Mountain Complex) greenstone; no other information is available. Later work, in 2006, identified a 1-metre-wide volcanogenic massive sulphide zone.

In 2006, a chip sample assayed 1.74 per cent copper, 3.0 grams per tonne silver and 0.11 gram per tonne gold (Assessment Report 30680).

Work History

In 1959, Totem Minerals Inc. completed a 238.0 line-kilometre airborne magnetic and electromagnetic survey on the area as the Vines claims. In 1969, Chapparal Mines Ltd. and Coast Silver Mines Ltd. completed a 486.0 line-kilometre airborne magnetic survey on the area. During 1979 through 1981, Shell Canada Resources Ltd. completed programs of geological mapping, geochemical (rock, silt and soil) sampling and ground geophysical (magnetic, electromagnetic and induced polarization) surveys on the area. This work identified quartz-carbonate veins in the area of the occurrence.

During 1998 through 2008, Eveready Resources Corporation completed programs of geological mapping, geochemical (rock and soil) sampling and trenching on the area as the Cassiar property. During 2008 through 2010, Hawthorne Gold Corp., later China Minerals Mining Corp., completed regional programs of geological mapping, geochemical (rock and soil) sampling and 11,657 line-kilometres of airborne magnetic, radiometric and electromagnetic surveys on the area immediately east as the Cassiar Gold property.

In 2014, BC Moly Ltd. completed a program of geological mapping on the Storie property. In 2019, Margaux Resources completed a program of prospecting, geological mapping and rock sampling on the area immediately east as the Cassiar Gold property. In 2020, Cassiar Gold Corp. completed a program of regional photogeological interpretation, prospecting and rock sampling on the Cassiar Gold property.