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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  24-Feb-1995 by Chris J. Rees (CRE)

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NMI
Name GERT, LIARD, FIRESIDE Mining Division Liard
BCGS Map 094M065
Status Showing NTS Map 094M11E
Latitude 059º 40' 43'' UTM 09 (NAD 83)
Longitude 127º 06' 56'' Northing 6617126
Easting 606118
Commodities Copper Deposit Types
Tectonic Belt Foreland Terrane Ancestral North America
Capsule Geology

The Gert copper showing is situated in the Liard and Gert claims of the Fireside property, 2 kilometres east of the settlement of Fireside on the Alaska Highway (Property File - Cholach, M.S. (1970): Report on the Fireside Copper property, Figure 2). Note that this is apparently not the same "Fireside Property" as that which was concerned with a barite mining operation 11 kilometres to the north-northwest (see Fireside - 094M 003).

The area is underlain by predominantly Lower Paleozoic sedimentary rocks of Ancestral North America (Geological Survey of Canada Maps 1712A, 1713A). Relief here in the Liard Plain is generally quite low and exposure is limited, so detailed geological control is lacking. The Fireside property is apparently underlain by Cambrian (or possibly older) argillite, slate and limy slate (Property File - Cholach, M.S. (1970); Geological Survey of Canada Map 46-1962).

Mineralization has been studied in three showings (Property File - Cholach, M.S. (1970)). Showings One and Two, on which the occurrence is centred, lie 600 metres apart on a northwest-striking, steeply-dipping shear zone in argillite. The shear zone is between 30 and 60 metres wide, and is marked by three sets of fractures, each filled with quartz and carbonate veins. At Showing One, disseminated chalcopyrite, locally abundant, is present in two of the sets. The "estimated average assay over the entire zone is about 0.1 per cent copper, and smaller richer sections may assay as high as 0.5 per cent copper" (Property File - Cholach, M.S. (1970)).

Showing Two has similar characteristics, but is not as well exposed. Trenches did not reach bedrock, so two holes were diamond drilled. In hole F1, the best chalcopyrite was intersected at between 3.65 and 8.3 metres below the collar, assaying 0.19 per cent copper over the 4.6 metres, including a 1.5-metre section grading 0.5 per cent copper (Property File - Cholach, M.S. (1970)). The other hole had to be abandoned.

Showing Three occurs on another northwest-striking shear zone, 3 kilometres to the east of the other showings, on the shore of a narrow, east-trending lake. The sheared slate here is veined with quartz over a width of 9 metres. This zone contains abundant chalcopyrite, with some malachite. Six 1.5-metre long channel samples were taken across the zone, in trench 3A. Assays ranged from 0.1 to 0.78 per cent copper, with an average of 0.35 per cent (Property File - Cholach, M.S. (1970)). Another trench cut approximately 30 metres to the northwest exposed the shear zone but it was not mineralized.

Bibliography
EMPR PF (*Cholach, M.S. (1970): Report on the Fireside Property)
GSC MAP 46-1962; 1712A; 1713A

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