The Cobra (Tibor) occurrence is located on the western side of Mount Haskin, approximately 1.8 kilometres east of Hot Lake and 103 kilometres north of the community of Dease Lake.

Regionally, the area is underlain by quartzite and quartz arenite sedimentary rocks of the Boya Formation and limestone, marble and calcareous sedimentary rocks of the Rosella Formation, both of the Lower Cambrian Atan Group, and limestone, slate, siltstone and argillite of the Cambrian to Ordovician Kechika Group. The sedimentary units have been intruded by granites of the Eocene Mount Reed stock.

The occurrence is underlain by a northwest-trending belt of Lower Cambrian Atan Group limestone and argillite, southeast of the Eocene Major Hart pluton granite stock. Sediments have been altered to calc-silicate hornfels and skarns. Disseminated to locally massive pyrrhotite-rich base metal garnet skarn occurs at a limestone-argillite contact. Mineralization consists of pyrrhotite, sphalerite and minor galena and chalcopyrite. Surface mapping of the Cobra zone indicates a strike of approximately north 60 degrees west with a dip of 40 to 45 degrees southwest.

Results of the initial subsurface exploration in 1974 were considered poor; however, the area tested was very restricted in relation to the known extent of the zone, which was traced for approximately 460 metres on the side of a steep gorge having an elevation differential of at least 228 metres. The best grade was reported to have been from 20.42 to 22.85 metres for 2.44 metres grading 65.14 grams per tonne silver, 2.60 per cent lead, 6.40 per cent zinc, 0.12 per cent copper and 0.03 per cent bismuth (Assessment Report 5121).

Work History

The area was first staked in part by Yukon Ranges Prospecting Syndicate in the spring of 1948 and the following year a program of geological mapping, sampling and trenching was performed. The property had been staked originally approximately 40 years before this and was the centre of a promotion that collapsed with the death of the promoter, Haskins.

In 1969, Brettland Mines Ltd. completed a 165.0 line-kilometre airborne magnetic survey on the area as part of the Krain Option property.

In 1973, a program of geological mapping and geochemical (silt and soil) sampling was completed on the area immediately north of the occurrence as the New Rich 1-2 claims. In 1974, exploration of the Mount Haskin property of Della Mines Ltd. consisted of a preliminary program of diamond drilling to investigate the Cobra zone. Previous sampling of old pits had revealed interesting geochemical analyses, particularly in zinc. in 1974, four drillholes ,totalling 137.1 metres, were completed. The skarn zone is poorly developed and occurs as two irregular bands interfingered with stringers of argillite: the upper band, varying from 1.8 to 7.6 metres wide, at the base of the limestone, and the lower band, from 0.9 to 3.66 metres wide, well within the argillite zone. Disseminated sulphide mineralization of the skarn is generally very weak although there are a few scattered zones up to several inches of massive pyrrhotite and sphalerite. Only traces of chalcopyrite and rare galena specks were observed.

In 1985, Erickson Gold Mining Corp. completed a program of geological mapping and soil sampling on the area immediately southwest of the occurrence as the Beaver claims. This work identified minor, localized, skarn zones hosting pyrite with minor galena and sphalerite and in one locality stibnite. These zones are located approximately 0.9 to 1.2 kilometres southwest of the Cobra occurrence on the north and south sides of a creek.

In 1994, the area was prospected and sampled by Daniel W. Brett and the Debby claims. In 1996, Daniel W. Brett completed a program of geological mapping and rock sampling on the area as the Reed property. In 1997, Demand Gold Ltd. completed a program of geochemical (rock and soil) sampling, minor trenching and a 9.0 line-kilometre ground magnetic survey on the Reed property. Also at this time, the area was prospected by Barry Ernewein as the Chi 1 and Geo 1 claims.

In 2008, Pacific Bay Minerals Ltd. completed a 917.0 line-kilometre airborne magnetic and electromagnetic survey on the area as the Haskin-Reed property. The following year, a program of geochemical (rock, silt and soil) sampling and trenching was completed on the property.

In 2014, the area was held as part of the Haskins Reed property.