The Menhinick Creek area contains several mineralized quartz veins hosted in northwest trending, northeast dipping metamorphosed rocks of the Lower Cambrian and younger Lardeau Group. In this area the Lardeau Group consists of Broadview Formation grey and green phyllitic grit and phyllite, and Jowett Formation green phyllite, limy green phyllite and greenstone. Foliation generally strikes 320 degrees and dips between 35 and 75 degrees northeast with a predominance of steep dips. The rocks have been isoclinally folded and complexly faulted. The Finkle Creek synform is a major structure and passes through the area.
The rocks in the Goldfinch occurrence area are grouped into two units. The first is a series of silver to grey to dark grey gritty phyllites with local carbonaceous seams and layers of carbonate- sericite rock. Mariposite occurs locally in highly carbonatized rocks. The second unit comprises medium green, non-bedded to streaky phyllitic greenstone with dark green clasts and local silicic pebbles.
Mineralization consists of native gold, pyrite, minor galena, chalcopyrite, sphalerite and trace tetrahedrite in a gangue of quartz with occasional calcite and graphite. Gold is generally associated with coarse-grained pyrite and visible native gold is rare but is present throughout the veins. The main ore zone (Dorothy) appears to be in an axial plane shear and is in the shape of a pod or lens. The quartz vein terminates with abrupt pinch-outs and also contains minor disseminated siderite pods. The quartz veins are both vertical and sub-horizontal and vary from very narrow veinlets a few centimetres wide up to 6 metres wide. Locally they resemble a stockwork with a general strike of 315 to 335 degrees and 50 degree to vertical north dips. There is strong structural control, both through faulting and folding. Faults generally strike 335 degrees and dip steeply (80 degrees) southwest. Joints strike 315 degrees and dip flatly (20 degrees) southwest.
The Dorothy structure has been traced by drilling for a strike length of 546 metres with widths between 1.8 and 9.1 metres, but averaging 3 to 3.6 metres wide. The zone has been tested to a vertical depth of 99 metres. Combined (proven and probable) reserves are 181,437 tonnes grading 10.29 grams per tonne gold (Granges Exploration Ltd., Review of Major Projects, January 1987).
The East zone is located approximately 20 metres east and parallel to the Dorothy and has been drilled over a strike length of 150 metres and to a depth of 80 metres. This zone averages 1.98 metres wide and is comprised of en echelon quartz veining characterized by low sulphide content but carrying visible native gold. A best assay returned 92.55 grams per tonne gold over 1 metre (George Cross News Letter #224, 1987). Reserves are estimated to be about 622,000 grams of gold (Northern Miner, November 30, 1987). Sulphide mineralization consists of galena, sphalerite and trace chalcopyrite.
The West zone has been drilled for 60 metres along strike and comprises a sulphide-rich zone containing coarse pyrite with native gold in quartz within graphitic phyllite similar to the Dorothy zone.
The Dorothy North zone is 100 metres north and along strike with the Dorothy. The Dorothy North zone has an 80 metre strike length and appears to be a separate and distinct zone.
The Main or Dorothy zone grades approximately 8.57 grams per tonne gold. Surface drilling has outlined a reserve of 149,700 tonnes grading 8.23 grams per tonne gold in the Dorothy vein, the original discovery zone. Exploration work on the combined Dorothy, Dorothy North and East zone has blocked out approximately 3,110,000 grams of gold. The Dorothy North, which is still open along strike and depth, has potential for another 149,700 tonnes of 8.57 grams per tonne gold. Drill results from this zone included: 4.85 metres of 5.14 grams per tonne gold, 4.66 metres of 8.57 grams per tonne gold, 3.17 metres grading 12.0 grams per tonne gold and 3.63 metres of 11.67 grams per tonne gold. Preliminary metallurgical test work has indicated an over 90 per cent recovery rate for the gold (Northern Miner, November 30, 1987).
The Scott Creek zone is 500 metres north of the Dorothy and comprises quartz-carbonate and quartz stockwork veins with widths of 3 to 4 metres and occasionally 10 metres. Reported grab and chip samples assayed 3.08 to 26.73 grams per tonne gold (Northern Miner, August 10, 1987).
The Camborne group of 8 claims (Lots, 5653, 5655-5661), onwed from 1901 or earlier by A. McKay and J.B. McKenzie, was Crown-granted in 1902. These claims surrounded on three sides the Goldfinch claim (Lot 5644). The North-western Mining Company, Limited optioned the Camborne group in 1901 and purchased the Goldfinch claim in 1902; this claim was Crown-granted to the company in 1903. A hydro plant, 1460-metre tramline and 10-stamp mill were installed on Menhinick creek in 1902-03. The company became insolvent and The Gold Finch Mining Company was formed to continue the operation. The mill operated for a short period in 1903-04, until a forest fire destroyed the tramline. Most of the development work was done on the Goldfinch claim. Ore for the mill came from a glory hole at elevation 1029 metres, about 100 metres southwest of the Independence group boundary. Two adits were driven on the Goldfinch, an upper (1023 level) and a lower (1003 level); the lower adit totalled 352 metres of drifts and crosscuts. In addition, an adit was reportedly driven 40 metres on the south side of Menhinick creek. Limited work was reported in 1904 and 1906 by optionee A. Rosenberger and in 1917 by J. Darragh & associates. In late 1933 the property was acquired by Dalhousie Gold Mines, Limited of Victoria but no work was reported.
In 1903, production of 726 tonnes yielded 16.2 kilograms of gold and 4.98 kilograms of silver and, in 1904 an additional 590 tonnes yielded 4.67 kilograms of gold and 633 grams of silver. The Independence group of 5 claims (Lots 12479-12483) was held from about 1903. Most of the work was done on the Dorothy claim (Lot 12481) which adjoins the Goldfinch claim on the northwest. The workings included trenches and two adits of 6 metres and 44 metres in length. The property was owned in 1924 by Owen Rowland and Crown-grants were issued to him in 1931-33. In 1939 the property was under option to W.T. Baker, of Trout Lake; work included trenching and 10 metres of crosscut. The vein system appears to be aligned with the vein system on the Independence claim. There are two principal quartz veins on the Independence claim. These are hosted in phyllite and in and adjacent to a rusty-weathered diabase dike. The No. 1 vein was originally exposed by trenching which follow the bedding planes for 120 metres striking 135 degrees, dipping 60 degrees to 70 degrees northeast. The No. 2 vein has been opened and drifted on from a short adit. This vein strikes 155 degrees and dips 70 degrees degrees southwest. A splay of this vein, sampled across 4.9 metres, assayed 17.1 grams per tonne gold and 10.2 grams per tonne silver (Annual Report 1914, page 250).
Claims lying on Scott Creek and adjoining the Independence group on the northwest included the Lost Cup, Phyllis and Nina (Lots 1870, 3755 and 4239 respectively (082KNW195)). Showings on this ground were discovered and staked in 1898. Some work was reported by Rossland interestes in 1898-1899. The Lost Cup was Crown-granted in 1905 to Baird, Crane, McClymont et al.
Eaton Mining & Exploration Ltd. acquired the Goldfinch (Camborne) Crown-grants in July 1971 and staked the Vik and Doe claims (40 units) over the Crown-grants and adjacent ground in 1979. Work in 1980 included geological mapping, a geochemical soil survey (166 samples), and rehabilitation of the adits; mineralized quartz from the upper adit was shipped to Trail. The company name was changed in July 1982 to Synco Development Corp. Trenching and sampling were reported in 1983.
The Independence group was held in 1979 by R.W. Bacon, of Kamloops. A bulk sample from an open cut was shipped to Trail. Windflower Mining Ltd. in October 1983 optioned the 5 Crown-grants and 3 reverted Crown-grants comprising the Independence and Lost Cup groups from Academy Enterprises Ltd. and R.K. Evans, of Fanny Bay. The company staked the Academy 1-4 claims (68 units) over adjacent ground to the west and north. Work in 1984 included magnetometer and electromagnetic surveys over 12 kilometres.
Windflower Mining in November 1984 optioned the Goldfinch property from Synco Development. Granges Exploration Ltd. optioned from Windflower a 60 per cent working interest in the combined properties in 1985; work that year included a geochemical survey and 603 metres of diamond drilling in 7 holes, magnetometer (9.0 kilometres) and electromagnetic (16.6 kilometres) surveys. Drilling totalled 33,750 metres in 37 holes in 1986, 9588 metres in 76 holes in 1987, and 7429 metres in 63 holes in 1988. Additional work on the Dorothy zone led to further production in 1989.