The Boomerang occurrence is located approximately 830 metres northwest of the north end of Bluey Lake and 1.4 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, a 15-metre-long, north-trending trench exposes chalcocite, bornite and malachite occurring along fractures in fine-grained diorite (microdiorite) or dioritized volcanics of the Upper Triassic Nicola Group (Central Belt, Bulletin 69). The diorite is chloritized and occasionally brecciated. Where brecciated, blebs and stringers of bornite, chalcocite and malachite occur between the fragments. Abundant disseminated magnetite, calcite and epidote are reported to accompany the brecciation. The mineralized zone appears to trend northwest. Two diamond drill holes (1960s?) are reported to have also been completed on this zone.

In 1901, a selected sample assayed 14.7 per cent copper, 4.1 grams per tonne gold and 74.1 grams per tonne silver (Minister of Mines Annual Report 1901, page 1183).

In 1981, a rock sample (8119) assayed 0.150 gram per tonne gold (Assessment Report 9491).

In 1985, three of five rock samples (2003, 2205 and 2563) assayed 0.183 to 2.34 per cent copper, 0.4 to 7.9 grams per tonne silver and 0.016 to 0.980 gram per tonne gold (Assessment Report 14141, Drawing 5b).

In 2019, a rock sample (21605) of mineralized gabbro assayed 2.24 grams per tonne gold and 0.881 per cent copper (Assessment Report 38460).

Similar mineralization occurs approximately 300 metres northwest of the previous zone and comprises a 15-metre-long trench exposing chalcocite, malachite and azurite as fracture coatings in several narrow, north-striking shears in chloritized diorite. A shallow shaft or pit and old opencuts, likely dating to the early 1900s, and a diamond drill hole, likely dating to the 1960s(?), are also reported to have been developed on this zone.

In 1981, a rock sample (8114) from this zone assayed 0.125 gram per tonne gold (Assessment Report 9491).

In 1985, a rock sample (B2019R) from this zone assayed 0.668 per cent copper and 0.625 gram per tonne gold (Assessment Report 14141).

Additional mineralization is reported approximately 200 metres west of the previous zone and comprises a trench or rock cut exposing malachite and chalcocite mineralization associated with epidote, calcite and hematite occurring at the intersections of shears striking 060 and 150 degrees in red andesite breccia.

In 1981, a rock sample (8117) from this zone assayed 0.105 gram per tonne gold (Assessment Report 9491).

In 1985, two rock samples (2008 and 2009) from this occurrence area yielded 0.415 and 0.276 per cent copper with 2.2 and 2.6 grams per tonne silver (Assessment Report 14141).

In 1990, a rock sample (3BR-28/08-90-18) of diorite with epidote, hematite and malachite from this occurrence area yielded 0.168 per cent copper and 0.095 gram per tonne gold (Assessment Report 20393).

Work History

The occurrence was explored as early as 1901. Several trenches and shallow shafts were excavated by 1904 and two diamond drill holes were drilled by 1928.

Scope Development Ltd. and Alscope Consolidated Ltd. conducted trenching, soil sampling, geophysical surveying and some diamond drilling on the area in 1964 and 1967.

During 1975 through 1981, Fred Gingell completed programs of geological mapping, geochemical (soil and rock) sampling and geophysical surveys on the area as the Bluey claims.

Various geological, geochemical and geophysical surveys were completed by F. Gingell between 1976 and 1981. Vanco Explorations Ltd. completed programs of geological mapping and geochemical (rock and soil) sampling in 1985 and 1987 on the area as the Bloo, Climax and Thor 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 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.

In 2013, Victory Resources Corp. completed a photogeological structural (lineament) analysis on the area. In 2018, Enduro Metals Corp. completed a minor program of prospecting, geological mapping and sampling on the area as the Tom Cat 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.