Abstract: The Valley deposit is located in east-central Yukon, 367 km northeast of Whitehorse. In 2012, Golden Predator Mining Corp. originally sampled gold-mineralized quartz veins in outcrop at what is now known as the Valley deposit. Snowline Gold Corp. subsequently followed up on the mineralization through diamond drilling from 2021 to present. The Valley deposit is a reduced intrusion-related gold system characterized by sheeted quartzcarbonate veins hosting free gold and associated lead-bismuth-tellurium sulphides, within a multi-phase, reduced granodiorite intrusion. The phases of the intrusion are physically and chemically distinct, exhibiting the evolution of a magma over time. Gold mineralization is strongly associated with vein density, whereby vein densities of >10 veins per metre correlate with gold grades of >1 g/t. In June 2024, the initial mineral resource estimate defined an Indicated Mineral Resource of 76 Mt at 1.66 g/t Au for 4.05 Moz Au, and an Inferred Mineral Resource of 81 Mt at 1.25 g/t Au for 3.26 Moz Au using a 0.4 g/t Au cut-off grade (Burrell et al., 2024).

Authors: Gamonal, S., Branson, T., Turner, A., Couper, H. and Yao, S.

NTS Mapsheet(s): 105O11

Citation: Gamonal, S., Branson, T., Turner, A., Couper, H. and Yao, S., 2025. Valley deposit: A geological introduction and overview. In: Yukon Exploration and Geology Technical Papers 2024, L.H. Weston, A. Stuart, S.K. Schultz, A.D. Brubacher and D.C. Cronmiller (eds.), Yukon Geological Survey, p. 1–18.

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