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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  15-May-1991 by Dorthe E. Jakobsen (DEJ)

Summary Help Help

NMI
Name ARIZONA (L.13026), ARIZ 1 Mining Division Nelson
BCGS Map 082F035
Status Past Producer NTS Map 082F06E
Latitude 049º 20' 05'' UTM 11 (NAD 83)
Longitude 117º 07' 30'' Northing 5464674
Easting 490919
Commodities Gold, Silver, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Quesnel, Plutonic Rocks
Capsule Geology

The Arizona showing is located 8 kilometres northeast of Ymir and adjoins the Wilcox mine (082FSW077) to the south. The area was explored in the early 1900's and the Wilcox mine produced intermittently up until 1943. The Arizona vein was sporadically worked from 1905 to 1945.

The area is underlain by porphyritic and gneissic granodiorite (Nelson batholith) of the Middle to Late Jurassic Nelson Intrusions which host north-northeast trending pendants. The pendants comprise Lower Jurassic Ymir Group sediments striking 010 to 082 degrees southeast. The sediments have been metamorphosed to quartz-biotite schist and biotite schist.

The Arizona vein is one of three mineralized quartz veins in the area, the other two are part of the Wilcox mine. The vein parallels the east trend of the Wilcox veins and the strike is subparallel to the regional foliation. The veins in the area have been emplaced along minor shears in the granodiorite. The mineralized veins appear to terminate against the roof pendants, particularly at the Wilcox mine. The vein, exposed in old workings, pinches and swells from 10 to 25 centimetres in width and strikes at about 260 degrees and dips 70 to 90 degrees north. The vein consists of massive bull quartz containing up to 30 per cent sulphides composed of pyrite and pyrrhotite with minor sphalerite, galena and arsenopyrite.

The vein contains highly variable values in gold ranging from less than 5 grams to over 45 grams per tonne. The records do not indicate the amount of hand cobbing carried out on the mined material to arrive at those final grades. The property, apparently, also produced minor amounts of copper but there is no indication of copper minerals present on the property nor in similar occurrences on adjoining and related properties. The Arizona vein produced about 296 tonnes of ore in total.

A 1985 chip sample of smoky, drusy quartz with dense, limonitic boxworks (J-04) taken from the vein assayed 60 grams per tonne gold (Assessment Report 14555). A geochemistry program in 1985 failed to outline the continuation of the Arizona vein.

Bibliography
EMPR AR 1905-167; 1923-387; 1941-26,66; 1942-27,62; 1943-64; 1946-35
EMPR ASS RPT 9619, *12726, *14555
EMPR BC METAL MM00952
EMPR BULL 41; 109
EMPR FIELDWORK 1980, pp. 149-158; 1981, pp. 28-32, pp. 176-186; 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 247-249; 1990, pp. 291-300
EMPR MAP 7685G; RGS 1977; 8480G
EMPR OF 1988-1; *1989-11; 1991-16
EMPR PF (In 082FSW General - Nelson Daily News, July 29, 1946)
GSC MAP 51-4A, 175A, 1090A, 1144A
GSC MEM *94, p. 76, Fig. 6; 308, p. 155
GSC OF 1195
EMPR PFD 2654, 3267

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