The Dark Star Deposit lies along the Dark Star Structural Corridor, a 12 km long, 400 to 600-meter-wide, north-south structural corridor of gold mineralization and alteration that has affected Paleozoic-age carbonate units. Gold mineralization at the Dark Star Deposit is hosted within decalcified and silicified Pennsylvanian-Permian carbonate units.
A maiden mineral resource estimate was calculated in early 2015 for the Dark Star Deposit area prior to the initiation and completion of the 2015 drilling campaign. Based upon positive results from the 2016 Phase 2 drilling at the Dark Star Deposit, an updated mineral resource was calculated in 2017. The 2017 updated mineral resource estimate, with an effective date of June 29, 2017, comprises an Indicated Mineral Resource of 15.38 million tonnes grading 0.54 g/t Au, totalling 265,100 ounces of gold, and an Inferred Mineral Resource of 17.05 million tonnes grading 1.31 g/t Au, totaling 715,800 ounces of gold, using a lower cut-off grade of 0.20 g/t Au.