The Bear showing is underlain by calcareous black shale, dolomite and ankeritic siltstone of the Ordovician to Devonian Road River Group, chert-pebble conglomerate of Lower Devonian age and siliceous and carbonaceous black shale of the Upper Devonian Gunsteel Formation (Earn Group).
The mineralization, traced for 1.5 kilometres along strike and intersected over 200 metres below the surface, is hosted within siliceous shales of the Gunsteel Formation. The mineralization is conformable with the bedding, which strikes 155 degrees and dips 80 degrees west. Diamond drilling has defined an upper and lower zone of massive mineralization, separated by two to eight metres of barren shale. The upper zone, 60 to 25 metres in width, is comprised of finely crystalline, bedded barite with interstitial galena and sphalerite, overlying non-baritic, finely laminated, massive pyrite with interstitial and bedded galena and sphalerite. Grades of 34.3 grams per tonne silver, 2.45 per cent zinc and 0.56 per cent lead, over 6.9 metres (true thickness), were obtained from the massive sulphide mineralization (Assessment report 8626, Drill log 80B-1). To the southeast, this body grades into a mega-breccia, slump body, with deformed bedded barite and pyrite clasts in a very fine grained barite, pyrite, and chert matrix.
In the hanging wall of the upper zone, mineralization occurs as sporadic 1 to 2-centimetre interbeds and veins of galena, barite and sphalerite hosted within black carbonaceous chert. A 17.1-metre drill intersection (11.1 metres true thickness) of this mineralization graded 1.91 per cent combined lead-zinc and 15.7 grams per tonne silver (Assessment Report 8626, Drill log 80b-4).
The lower zone, comprised of non-baritic, massive pyrite with galena and sphalerite, graded 1.35 per cent combined lead-zinc and 7.7 grams per tonne silver (Assessment Report 8626).
In 1970, Geophoto Surveys conducted a reconnaissance stream sediment survey in the region.
In 1973/1974, Canex-Placer investigated stream sediment anomalies with initial prospecting which discovered mineralized float in Driftpile Creek, which was later staked.
In 1974/1975, Canex-Placer conducted geological mapping, soil sampling, hand trenching and an electromagnetic survey in the Driftpile area.
In 1976, Castlemaine conducted further stream sediment sampling in the region around the Canex-Placer property.
The Bear showings were discovered in 1977 by the Gataga Joint Venture which was organized by Aquitaine Company of Canada Ltd., Chevron Canada Limited, Getty Mining Pacific, Limited, and Welcome North Mines Ltd. The Gataga Joint Venture was formed to follow up extensive anomalies on unstaked ground. Work consisted of extensive soil sampling and regional geologic mapping. During this phase the Bear claim was staked to cover anomalies over a weakly mineralized zone, which was hand trenched. Drilling was also reported to have been done.
In 1979, The SI claims were added to protect favourable stratigraphy with soil anomalies. The IF claims were also staked in 1979 to cover a possible strike extension of the Bear mineralization. In 1980, the main showing on the Bear claim was tested by the Gataga Joint Venture with 5 diamond drill holes for a total of 818 meters. In 1981, 2 diamond drill holes tested mineralization on the Bear property, totalling 325.5 meters.
In 1993, two weeks of mapping and sampling by Teck Exploration Ltd resulted in the collection of 44 rock samples. In 1994, a total of eight NQ diamond drill holes were completed for a total of 1808 metres. Only two of these holes were reported on by Teck Exploration Ltd. Drilling confirmed the mineralization remains open to the northwest. A recognizable sequence of rock types hosting mineralization is recognized and in the area of the 1994 drilling appears overturned. The sequence consists of a basal “Footwall” sequence of graphitic cherts with varying amounts of pyrite disseminations and laminations. At the break into non-siliceous shales and turbidites the main mineralized zone occurs. This interval of 15 to 20 meters in thickness consists of well laminated pyrite and barite (Sedex style) mineralization with varying amounts of laminated sphalerite and galena and is considered to be sub-economic. The upper part of the sequence encountered in the lower portions of the holes consists of non-siliceous shales and turbidites. Mineralization is open both along strike and down dip and further drilling is warranted. The most promising direction appears down dip away from dissecting thrust faults.
In 2013, a VTEM survey was conducted on the SI property of Teck Resources Limited (Assessment Report pending).