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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  29-Jun-2021 by Karl A. Flower (KAF)

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Name RIO, DEB, RIO 77-80, SV 22, SV 1 Mining Division Kamloops
BCGS Map 092I035
Status Showing NTS Map 092I06E
Latitude 050º 22' 50'' UTM 10 (NAD 83)
Longitude 121º 01' 50'' Northing 5582798
Easting 640022
Commodities Copper Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Quesnel
Capsule Geology

The Rio claims cover a large area east and south of Spaist Mountain where outcrop is scarce. Mineralization is located mainly on the former Rio 75-80 claims straddling Skuhost Creek (Assessment Report 997).

The area is underlain by Upper Triassic to Lower Jurassic Guichon Creek batholith Bethsaida phase granodiorites. Occasional quartz-orthoclase dikes and one aplite dike have been mapped. Small, isolated diorite, gabbro and pyroxenite outcrops occur to the southwest in Chataway variety granodiorites (see Bin 1-28 (Noranda), 092ISW023).

Minor chalcopyrite, bornite and pyrite occur sporadically in epidote-quartz-calcite stringers in fractures. Percussion drilling to the south (holes P3-P5, P7) showed weak propylitic alteration with mostly no mineralization. Minor malachite and pyrite were reported in the first few metres of bedrock in drill hole P5. High feldspar content was noted in drill hole P7, furthest south from mineralized outcrop (Assessment Report 6611).

Work History

In 1965 and 1966, Rio Tinto Exploration Ltd. completed programs of soil sampling, geological mapping a ground magnetic survey on the area as the Rio claims. In 1969, High Point Mines Ltd. completed a 52.0 line-kilometre induced polarization survey on the area as the Deb claims.

In 1978, Lorado Mining Corp. Ltd. completed seven percussion drill holes, totalling 514.0 metres, and a 1 line-kilometre seismic survey on the area as the SV property. The following year, Lornex Mining Corp. Ltd. completed a program of trenching, 10 diamond drill holes, totalling 974.5 metres, and 5 percussion drill holes, totalling 74.7 metres, on the SV claims.

In 1982 and 1984, Norsemont Mining Co. Ltd. completed ground magnetic survey on the SV claims. In 1985, Norsemont Mining completed an airborne electromagnetic and magnetic survey on the SV 1-13 claims. In 1986, Teck Ex. completed a 52.5 line-kilometre induced polarization survey on the area as the SV 21-26.

EMPR AR 1966-161,248; 1967-283
EMPR ASS RPT *780, *997, 1898, *6611, 7836, 10146, 12159, 14231
EMPR BULL 56; 62
EMPR EXPL 1977-E143; 1979-165; 1981-217; 1984-206; 1985-C193
EMPR GEM 1969-254
GSC MAP 1010A; 1386A; *42-1989
GSC P 46-8; 47-10
CIM Spec. Vol. 15 (1976), pp. 85-104
Northcote, K.E. (1968): Geology and Geochronology of the Guichon Creek Batholith, British Columbia, Unpublished Ph.D. Thesis, The
University of British Columbia