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Cochrane Pond Uranium
Despinassy Gold
TAM Project, Cu-Au-Mo
Olympic-Rob, Cu-Au-U
Orion Gold
South Voisey’s Bay, Nickel
Nepisiguit-Stewart, Zn-Cu
Pelly Gold
Diamonds
Lochinvar, Zn-Cu
Sabin, Zn-Cu
Stump Lake, Au
Omineca, Cu-Au-Mo
| | | Summary: The Stump Lake Epigenetic gold prospect was recently discovered by the Kamloops-based Marlow prospecting Syndicate and optioned by Commander Resources in June 2011. The prospect is located about half way between Kamloops and Merritt, B.C., 5 km off Hwy 5A at Stump Lake. Gold values ranging from 0.5 to 6 g/T Au were sourced by coarse, quartz-carbonate breccia containing an abundant stockwork of open-spaced, chalcedonic quartz veins and fracture-fillings. Scattered showings of this gold-bearing breccia have been located over a 1 kilometre strike in limited outcrop. These breccia bodies have been emplaced at the western margin of a block of Triassic Nicola volcanics, a fault-bounded uplift that juxtaposes older, arc-related volcanics with younger (Upper Cretaceous) granitoid intrusives. The Moore Creek Fault forms the western boundary of the block less than 1 kilometre from the Stump lake Showings. Preliminary interpretation of regional magnetic data indicates a series of small intrusives underlies the gold prospective area. Numerous occurrences of fluorite accompany the breccia bodies, indicating a possible granitic source of the volatiles. The breccia bodies were emplaced under considerable heat and force as angular country rock clasts of up to several centimeters in size are included in the quartz carbonate breccia. In some locations, these xenoliths have been thermally altered and partially replaced by honey-coloured sericite. Mining History of the Merritt-Kamloops District Over 100 years ago, the historic Iron Mask Copper-Gold Mine was developed just south of Kamloops. In the 1930's, the Stump lake base-precious metal Planet Mine produced over a 10 year period. The district is now the largest copper producing area in Canada, with the giant Valley copper deposit to the NW, the newly restarted Copper Mountain Mine to the south, the Craigmont Iron-Copper Mine (mined out) at Merritt, Afton at Kamloops will restart shortly and the large Ajax copper deposit is being advanced by a Polish company. Gold is a by-product at all these deposits. Numerous gold-base metal showings are located south of Stump Lake and are currently held under tenure by others. Sampling and Assay Results Over 80 samples have been taken along a 1.1 km strike extent of the quartz-carbonate breccia. Outcrop is quite sparse as the area of interest is situated in a flat, overburden-covered plateau with a small valley to the west. To date, 3 outcrop areas with clusters of exposed carbonate breccia have been located. Of the 82 samples collected, 19 (or near 25%) exceed 1 g/T Au. Selected sample results with locations are shown on the attached maps. The samples are mostly multiple chips weighing from 0.3 to 2.0 kilograms. As there is little fabric in the quartz-carbonate breccia, a number of chips were taken over an outcrop, giving a "panel sample". Several continuous chip samples were taken. Geology The Stump Lake gold property is located in the Interior Plateau, on the eastern margin of the Quesnellia Terrane. Regional mapping shows that local Nicola Volcanics consist of gently dipping intermediate flows, pyroclastics, volcaniclastics and porphyries. Locally, the Nicola Volcanics are bounded by two northerly-trending faults as a block about 7 kilometers wide from east to west and 20 kilometers long. Along the western margin, the volcanics have been juxtaposed adjacent to younger Jurassic and Cretaceous intrusive complexes proximal to the Stump Lake gold prospect along the Moore Creek Fault. In the area of the gold prospect, local volcanic flows and volcaniclastics are generally flat-lying or dip gently easterly. Preliminary examination of complex, local magnetic features indicates that a series of short, NS elongate intrusives or wide dykes from one to three kilometres long, reach within one or two hundred metres of surface. These features can bee seen on the accompanying geology map. Gold Prospects The gold hosting quartz carbonate breccia bodies can be seen in three areas of exposed bedrock scattered over a one kilometre strike. The breccia bodies appear to be flat-lying or gently dipping, likely emplaced along bedding planes of the volcanic sequences. The breccia bodies are from one to four metres thick or more. In one area of discontinuous outcrop, a 10 metre thick breccia is indicated. On weathered surfaces, an indistinct horizontal banding is evident, but on fresh broken rock, this layering cannot be seen. The breccia comprises coarse intergrowth of white carbonate and silica. Due to identical colours, exact relationships are difficult to establish on broken faces. A later stockwork of fine grained and chalcedonic silica and quartz veins cut through the breccia, indication multiple stages of volatile emplacement. Purple fluorite grains and crystals are seen in several locations associated with the late chalcedonic veins. All later veins have millimetre to centimetre sized vugs with cyrstalline quartz grown, indicating a high level, epigenetic environment for emplacement. The quartz-carbonate veins also contain highly angular to rounded xenoliths of country rock, ranging from one to five centimetres diameter. The xenolith abundance is highly variable and fragments appear to range from one to thirty per square foot. These xenoliths have been thermally altered to hornfels or chemically altered with honey-coloured sericite. The above features clearly indicate that the quartz-carbonate bodies were dynamically emplaced under pressure as they brecciated and invaded country rock. The volatiles were, at least in part, reactive as strong sericite alteration is visible in many xenoliths. Multiple bodies of breccia have been emplaced at different bedding planes as can be seen down a slope into the Moore Creek valley. These are traced over a vertical distance of about 40 metres before being obscured by the valley bottom. This multiple breccia body emplacement indicates a possible thick sequence of mineralized breccia bodies. All above features can be seen on accompanying photographs. Visible gold has yet to be found at the Stump Lake prospect. As there are also few sulphides, this is considered to be a low sulphidization, epithermal gold system. | ||||||||||
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