The Granite Creek Skarn (Pass) occurrence is located near the south bank of Granite Creek at an elevation of approximately 1560 metres.
Regionally, the area is underlain by the Middle Jurassic Bonnington Pluton and by the Lower to Middle Jurassic Rossland Group volcanics. Locally, the Rossland Group is composed of the Lower Jurassic Archibald formation, augite porphyry andesite flows, agglomerates, breccias and tuffs. The Lower Jurassic Hall formation lies conformably on the Elise formation and is comprised of argillite, siltstone and conglomerate with minor volcanic rocks. The Middle Jurassic Bonnington Pluton is quartz diorite and is part of the Nelson Intrusive Suite. The Bonnington Pluton is flanked to the south and to the east by Rossland Group rocks.
Locally, a steeply dipping stratiform, tabular or lensoidal magnetite-bearing skarn zone hosts copper and gold values.
A second mineralized zone, comprising silicified hornfelsed mineralized volcanic, is located approximately 460 metres northwest of the Granite Creek skarn in a shallow trench located in a clear cut above the Munson Forest Service Road.
Work History
Historical workings, likely dating to the late 1800s or early 1900s, include a short adit and several open cuts.
In 2006, the area was prospected and sampled by J. Denny. A magnetometer survey was also completed during this time. A rock sample from the skarn zone is reported to have assayed 1.79 per cent copper and 3.3 grams per tonne gold (Bronson, G.R. (2019-04-30): NI 43-101 Technical Report on the Pass Property with Recommendations for Further Exploration).
In 2010, Swift Resources Inc. completed a program rock and soil sampling, trenching and ground magnetic and electromagnetic surveys. Samples from the skarn zone yielded up to 0.54 per cent copper and 1.69 grams per tonne gold, while samples from the northwest trench zone assayed up to 9.0 grams per tonne gold (Bronson, G.R. (2019-04-30): NI 43-101 Technical Report on the Pass Property with Recommendations for Further Exploration). Further programs of trenching were performed in 2011.
In 2017, Sentinel Resources Inc. completed a program of prospecting, geological mapping, heavy mineral sediment sampling, rock sampling and magnetometer and induced polarization surveys on the area as the Pass property. Rock samples from the adit waste dump assayed up to 9.2 grams per tonne gold, 50 grams per tonne silver and 4.51 per cent copper, while a sample from the northwest trench zone assayed 4.68 grams per tonne gold (Bronson, G.R. (2019-04-30): NI 43-101 Technical Report on the Pass Property with Recommendations for Further Exploration).