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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  29-Jun-92 by Peter S. Fischl(PSF)

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NMI 092H15 Cu5
Name PAYCINCI, CINCINNATTI (L.1127), COPPER JACK (L.1189), NOBLE FIVE (L.1131), PAY, PAYCO, LISA, MICKEY Mining Division Nicola
BCGS Map 092H098
Status Developed Prospect NTS Map 092H15E
Latitude 49º 54' 49" N UTM 10 (NAD 83)
Longitude 120º 34' 54" W Northing 5531830
Easting 673616
Commodities Copper, Silver Deposit Types D03 : Volcanic redbed Cu
Tectonic Belt Intermontane Terrane Quesnel
Capsule Geology

The Cincinnatti prospect is centred 1.1 kilometres west- northwest of the south end of Alleyne Lake and 3.0 kilometres north- northwest of the south end of Kentucky Lake.

The deposit is located in the southern portion of an area of hilly upland situated in the centre of the Aspen Grove copper camp, known as the Fairweather Hills. The Fairweather Hills region is underlain by the Central volcanic facies of the Upper Triassic Nicola Group, comprising intermediate, feldspar and feldspar augite porphyritic pyroclastics and flows, and associated alkaline intrusions. The intrusions vary from diorite to monzonite in composition and are thought to be comagmatic with the Nicola Group, ranging in age from Late Triassic to Early Jurassic.

Locally, the area is underlain by red and green laharic breccias, augite andesite porphyry and minor sediments of the Nicola Group (Central belt, Bulletin 69). The units generally strike north-northwest and dip east. This sequence is broken up into a series of tilted fault blocks trending north.

Hypogene and supergene copper mineralization occurs in green laharic breccia, near the contact with red laharic breccia to the east. This mineralization consists primarily of disseminated and fracture controlled chalcocite and native copper, accompanied by lesser malachite and azurite, and minor chalcopyrite, bornite, cuprite and pyrite. Drilling indicates chalcopyrite becomes more abundant at depth at the expense of chalcocite. This mineralization is exposed along the crest and east flank of a small northerly trending ridge, over a north-south distance of 400 metres.

Drill indicated reserves are 54,000 tonnes grading 0.876 per cent copper (Assessment Report 7654, page 1). Precious metal values are generally low. Six rock samples analysed 1.1 to 2.4 per cent copper, 0.005 to 0.010 gram per tonne gold and 1.3 to 5.7 grams per tonne silver (Assessment Report 14108, Figure 5, samples 2051 to 2056). One chip sample taken along a trench yielded 0.89 per cent copper over 49 metres (George Cross News Letter No. 90 (May 8), 1992).

The Cincinnatti deposit was first explored by the Bates brothers in the early 1900s. A number of trenches, and one adit 120 metres long, were excavated between 1899 and 1913. Payco Mines Ltd. and Alscope Consolidated Ltd. conducted geological and geophysical surveys, trenching and diamond and percussion drilling between 1963 and 1967. An additional 15 holes totalling 1000 metres were drilled by Gold River Mines and Enterprises Ltd. in 1973 and Sienna Developments Ltd. in 1979. The deposit was most recently sampled by Pacific Copperfields Ltd. in 1992.

In 1998, Christopher James Gold Corp. optioned the property. Reserves are estimated at 1.8 million tonnes grading 1 per cent copper (Tom Schroeter, 1998).

Bibliography
EMPR AR 1899-742,743; 1900-899; 1901-1089,1182; 1903-246; 1904-239;  1905-203; 1913-223; 1915-226; 1928-223; 1963-55,56; 1964-96;  1965-156; 1966-168,169; 1967-174
EMPR ASS RPT *7654, *14108, 21678
EMPR BULL 69, p. 89
EMPR EXPL 1979-156
EMPR FIELDWORK 1974, pp. 14-16
EMPR GEM *1974-125
EMPR MAP 10 (1973); 15 (1974)
EMPR P 1981-2
EMPR PF (*Kelly, S.F. (1963): Summary Report and Recommendations on  the Payco Mines Ltd. Claims near Aspen Grove, B.C., and  accompanying 1 to 600 scale plan of diamond drill holes, trenches  and workings)
EMR MIN BULL MR 223 B.C. 125
EMR MP CORPFILE (Payco Mines Ltd.)
EMR MP RESFILE (PAY) RES
GSC MAP 888A; 1386A; 41-1989
GSC MEM 243, p. 94
GSC OF 2167, pp. 93-98
GSC P 85-1A, pp. 349-358
GSC SUM RPT 1904-77A
CJES Vol. 16, pp. 1658-1672 (1979); Vol. 24, pp. 2521-2536 (1987)
GCNL *#90 (May 8), 1992
Olien, K.O. (1957): Geology and Mineral Deposits of the Aspen Grove  Area, B.C., unpublished B.Sc. thesis, University of Western  Ontario

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