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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  09-Jan-2013 by Sarah Meredith-Jones (SMJ)

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Name OKANAGAN (L.9127), ENDERBY (L.9128), RIT Mining Division Revelstoke
BCGS Map 082K063
Status Past Producer NTS Map 082K11W
Latitude 050º 37' 11'' UTM 11 (NAD 83)
Longitude 117º 21' 56'' Northing 5607602
Easting 474140
Commodities Gold, Silver, Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Kootenay
Capsule Geology

The Okanagan and Enderby occurrence is at 2354 metres elevation in an alpine basin to the west of Triune Mountain. The Okanagan (L.9127) and Enderby (L.9128) claims are near the head of Burg Creek, which drains to the southwest into Trout Lake. They are uphill from the Winslow (L.8680) and Gladhand (L.8681) [082KNW025], immediately to the southeast of the U & I (L.7589) [082KNW023], and 1.5 kilometres to the northeast of the Alice (L.7440) [082KNW165] properties, with which they are grouped.

The Okanagan and Enderby veins were located in the early 1900s and were partially developed by 1914. At that time there were several open cuts and a shaft, and there was an adit underway. Exploration continued intermittently and Winslow Consolidated Limited processed an unspecified, but small, amount of ore from the Okanagan vein for Le Roi Gold Mining Syndicate, in 1941. It was processed at the Winslow mill, whichis approximately 1.0 kilometres west of the Okanagan vein. In 1944, a further 200 tonnes of high-grade ore were stockpiled for later processing. There is no record of it being shipped.

The principals behind Sask-Wainwright Oil and Gas Company acquired the Okanagan and Enderby claims, the Winslow and Gladhand [082KNW025] and the nearby, U & I [082KNW023] and Alice [082KNW165] and other tenures in the early 1950s and worked on the enlarged property intermittently throughout the 1960s and 1970s. In 1983, Winslow Gold Corp acquired the ground from Sasko Oil and Gas Limited and continued the work. However, most of its effort was focused on the Winslow vein. In 1989, the tenures were surrounded by the Rit Claims.

The Trout Lake area is underlain by a thick succession of sedimentary and volcanic rocks of the Badshot Formation and Lardeau Group near the northern end of the Kootenay arc, an arcuate, north to northwest trending belt of Paleozoic and Mesozoic strata that is now classified as a distinct, pericratonic, terrane. The arc rocks are bordered by Precambrian quartzite in the east and they young to the west, where they are bounded by Jurassic-age intrusive complexes. They were deformed during the Antler orogeny in Devonian-Mississippian time and refolded and faulted during the Columbian orogeny, in the Middle Jurassic. A large panel, the "Selkirk allochthon", was later offset to the northeast by dip-slip motion along the Columbia River Fault.

The Badshot Formation is composed of a thick Cambrian limestone that is a distinctive marker horizon in the Trout Lake area. It is underlain by Hamill Group quartzite and it is overlain by a younger assemblage of imestone, calcareous, graphitic and siliceous argillite and siltstone, sandstone, quartzite and conglomerate, and also mafic volcanic flows, tuffs and breccias, all of which belong to the Lardeau Group. The rocks are isoclinally folded and intensely deformed, but only weakly metamorphosed. They occur as intercalated beds of marble, quartzite and grey, green and black phyllite and schist. Fyles and Eastwood (EMPR BULL 45) subdivided the group into six formations (Index, Triune, Ajax, Sharon Creek, Jowett and Broadview) of which the lowermost (Index) and uppermost (Broadview) are the most widespread. The Triune (siliceous argillite), Ajax (quartzite) and Sharon Creek (siliceous argillite) are restricted to the Trout Lake area. The Jowett is a mafic volcanic unit.

The Okanagan and Enderby claims are aligned perpendicular to the regional strike and provide a partial section through the Lardeau Group on the southwest side of the Silver Cup Ridge. They are underlain from northeast to southwest by black, siliceous phyllite of the Sharon Creek Formation, a major fault, a thick succession of green, gritty, metasediments of the Broadview Formation and a narrow (61 metre) band of Jowett Formation mafic volcanic strata. The rocks are highly deformed and schistose, and strike 130 and dip 55 degrees to the northeast.

The Okanagan vein is one of many barren and mineralized quartz veins exposed above tree line below the summit of Triune Mountain. It is a 0.46 to 1.37 metres wide quartz vein that is markedly discordant to schistocity. It strikes 010 degrees (north end) to 033 degrees (south end) and dips at between 57 and 65 degrees to the east. It was located in the early 1900s and was explored by several open cuts and by two shafts driven to a depth of 4.27 metres, prior to 1914. There is also mention of an early, unsuccessful, attempt to access the vein by means of an adit. The vein has been traced for 61 metres and may extend for a "considerable" distance to the south of the old workings. However, to the north, it is known to pinch out. The vein contains variable amounts of pyrite, in bunches and as disseminations, and lesser amounts of galena, sphalerite and chalcopyrite. A sample of pyrite free from quartz was examined for visible gold without success but was found to contain 469.7 grams per tonne gold and 270.8 grams per tonne silver on assay. An average sample across the vein in the shaft ran 65.1 grams per tonne gold and 99.4 grams per tonne silver over 0.91 metre. Other "grab samples" from the shaft are reported to have assayed 35.31, 92.91, 76.11 grams per tonne gold respectively, and a sample collected from the north shaft is described as containing 57.6 grams per tonne gold over 0.36 metre.

The Enderby vein is tens of meters northwest of the southeast corner of the crown grant. It is reported to strike 055 and dip flatly to the east. It is 0.46 to 0.91 metre wide and is galena-rich and more similar to the Silver Cup [082KNW027] vein than the Winslow [082KNW025]. A shallow shaft was sunk on the dip of the vein and a 0.61 metre section is reported to have run 1.37 grams per tonne gold, 1605.6 grams per tonne silver and 43.43 per cent lead. The vein could not be located in 1983.

EMPR AR *1914-K310; 1915-449,450; 1918-K156; 1940-A64; 1941-A62
EMPR ASS RPT 674, *8642, *12310, 17227
EMPR BULL 45 p. 87
EMPR GEM 1973-95
EMPR OF 1990-24
EMPR PF (*Report on the Winslow Group and Associated Properties and Spider Mine by B.W.W. McDougall, 1946: *Compilaton Report on the Winslow Gold Mine by J. Millar and Associates, December, 1963; Trans-Western Oils Ltd.: *Geological Evaluation of the Winslow Group Claims and Crown Grants by J.R. Allen; Winslow Gold Corp. Prospectus, May, 1987).
GSC MEM 161 pp. 27,45,46
NMiner 4th July, 1983