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File Created: 13-May-2015 by Karl A. Flower (KAF)
Last Edit:  06-Jan-2025 by Del Ferguson (DF)

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NMI
Name COPPER PLATEAU, NBR, BR Mining Division Clinton, Lillooet
BCGS Map 092J093
Status Showing NTS Map 092J13E
Latitude 050º 54' 28'' UTM 10 (NAD 83)
Longitude 123º 30' 19'' Northing 5639691
Easting 464475
Commodities Copper, Molybdenum, Silver, Gold Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Coast Crystalline Terrane Plutonic Rocks, Cadwallader
Capsule Geology

The COPPER PLATEAU occurrence is located near a small lake on a plateau 1.5 kilometres north of the North Fork of Bridge River and 47.5 kilometres west of the village of Gold Bridge. It is in the same vicinity as the Bridge River (Minfile 092JW010) and NBR (Minfile 092JW050) mineral occurrences.

The area is primarily underlain by the Early Tertiary-age granitic Bridge River Pluton, which intrudes the Late Cretaceous quartz diorite to the southeast and a similarly aged granodiorite body, the Lord River Pluton to the north, west and southwest. The intrusive rocks are overlain by flat-lying Miocene-age basaltic flows (Garibaldi) and intruded by basalt to diorite feeder dikes and felsite, quartz porphyry and felspar porphyry dikes.

Locally, sulphide mineralization, mainly chalcopyrite and molybdenite, is strongly fracture- controlled, confined to veins and veinlets mainly within a quartz monzonite. Other sulphide minerals present include bornite, chalcocite and pyrite; oxidation products of sulphides include malachite, azurite and tenorite. Wallrock alteration is weakly propylitic, with sericite and potassic alteration associated with quartz and sulphides in, and adjacent to, veins.

In 2009, sampling of trench TR09-4 assayed 3.55 per cent copper, 0.04 per cent molybdenum, 20.6 grams per tonne silver and 0.125 grams per tonne gold over 1.0 metre (Sample 13870; Assessment Report 31388). Another trench (TR09-11), located approximately 100 metres to the north east, assayed 0.49 per cent copper over 4.9 metres (Samples 14640 through 14644; Assessment Report 31388).

In 2011, diamond drillhole CP11-03 intercepted 85.2 metres averaging 0.053 per cent copper; including 36.6 metres yielding 0.090 per cent copper (Assessment Report 33319).

In 1970, Canex Aerial Exploration completed programs of geological mapping and an induced polarization survey, totaling 2.5 line-kilometres, on the area as the BR claims. In 1980, Amax of Canada completed a program of geological mapping, ground geophysical surveys and rock, silt and soil sampling. During 2005 through 2019, Cresval Capital Corp. completed programs of prospecting, geochemical sampling, trenching, an induced polarization survey, 2031.5 metres of diamond drilling in nine holes, an airborne magnetic and radiometric survey and a ground magnetic survey over areas of the property known as the Copper 1-25 claims, the Bridge River project and the Mike property.

In 2011,1261 metres of diamond drilling in 5 holes were completed over the Copper Plateau area. A ground magnetic survey was completed over the area in 2019. Cresval changed its name to Transforma Resources Corp. in October 2021.

Bibliography
EMPR AR 1961-25
EMPR BULL 100
EMPR GEM 1970-222; 1971-310
EMPR OF 1995-20, pp. 87-92
GSC OF 482
GSC P 75-1A, pp. 37-40
GSC SUM RPT 1924, pp. 76-99; 1928, pp. 78A-93A
GSC PR MAP 29-1963

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