The Bunker Hill occurrence is located approximately 1.05 kilometres west-southwest of the north end of Bluey Lake and 2.25 kilometres southwest of the south end of Kentucky Lake.

Regionally, the area is underlain by the Upper Triassic Nicola Group, which regionally consists of alkalic and calc-alkalic volcanics and intrusions of island arc origin, and which is the principal component of the Quesnel terrane in southern British Columbia (Geological Survey of Canada Maps 41-1989, 1713A). The area lies in the Central Belt or facies of the Nicola Group (after Preto, Bulletin 69). This belt of rocks mainly consists of subaerial and submarine, red or purple to green augite plagioclase porphyritic andesitic and basaltic flows, volcanic breccia and tuff, and minor argillites and limestone. The volcanics are intruded by bodies of comagmatic Upper Triassic to Lower Jurassic diorite to monzonite. The area is characterized by long-lived, primarily north-striking faults and related fracturing, which originally controlled intrusion emplacement. East-striking faults are subordinate, and commonly offset intrusive contacts.

Locally, several trenches and old pits expose chalcocite, bornite, chalcopyrite, pyrite, malachite and azurite in brecciated and altered pyroxene plagioclase porphyritic andesite of the Upper Triassic Nicola Group (Central Belt, Bulletin 69). Brown carbonate (?) alteration is associated with sulphide mineralization.

In 1985, a rock sample (88603) from the main zone assayed 0.391 per cent copper (Assessment Report 14141).

In 1987, two rock samples (6720 and 6723) from the main zone yielded 0.458 and 0.274 per cent copper with 1.4 and 4.6 grams per tonne silver, respectively, whereas a sample (6804) taken several hundred metres south-southeast of the previous samples yielded 1.218 per cent copper and 12.2 grams per tonne silver (Assessment Report 17118).

In 2006, a chip sample (K-05) assayed 3.73 per cent copper and 33.4 grams per tonne silver over 2 metres (Assessment Report 28782).

Copper mineralization is also found 470 metres east-southeast of the trenches, in red volcanic breccia and lahar deposits.

In 1985, four rock samples (2211, 2285, 2286, 2289) from this zone assayed 0.229 to 0.857 per cent copper (Assessment Report 14141, Figure 5b).

Work History

In 1956, Fidelity Uranium Mines Ltd. completed a program of geological mapping and trenching on the area as the Nor claims.

During 1975 through 1981, Fred Gingell completed programs of geological mapping, geochemical (soil and rock) sampling and geophysical surveys on the area immediately north of the occurrence as the Bluey claims. In 1985, Vanco Explorations Ltd. completed a program of geological mapping and geochemical (rock and soil) sampling on the area as the Bloo, Climax and Thor claims. In 1987, a further program of rock and soil sampling was completed on the claims.

In 1990, MineQuest Exploration Associates Ltd. completed a minor program of prospecting, geological mapping and rock sampling on the area as the Al 1-3 and Ken claims. In 1992, Pacific Copper Fields Inc. and MineQuest Exploration Associates Ltd. completed a program of geological mapping and rock sampling on the claims. In 1996 and 1997, Len Harris and later Matrix Energy Inc. completed programs of prospecting and rock sampling on the area as the Tom Cat and Climax claims.

In 2002, Gary Brown prospected and completed a 12.6-line-kilometre ground magnetic survey on the area as the Bluey 2 claim. In 2004, Copper Hill Exploration Corp. completed a program of geological mapping and photo-geological interpretation on the area as the Ketchan property. In 2006, Bold Ventures Inc. completed a program of geochemical (rock and soil) sampling and a 28.0-line-kilometre induced polarization survey on the area as the Casper claims of the Kentucky Lake property. The following year, six diamond drill holes, totalling 1025.9 metres, were completed on the property.

In 2011, Moag Copper Gold Resources Inc. completed a program of soil sampling on the area as part of the Ketchan property. In 2013, West Cirque Resources Ltd. completed a program of geological mapping and rock sampling on the area as the Aspen Grove property. Also at this time, Victory Resources Corp. completed a photogeological structural (lineament) analysis on the area. During 2014 through 2016, KZD Aspen Grove Holding Ltd. and Kaizen Discovery Inc. completed programs of prospecting and geological mapping on the area immediately south of the occurrence as the Aspen Grove property. In 2019, Enduro Metals Corp. completed a minor program of geological mapping and geochemical (rock and soil) sampling on the area as the Tom Cat property.