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File Created: 01-Jun-1999 by Paul Schiarizza (PSC)
Last Edit:  21-Jun-1999 by Paul Schiarizza (PSC)

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NMI
Name RUBYROCK CREEK Mining Division Omineca
BCGS Map 093K063
Status Showing NTS Map 093K11W
Latitude 054º 40' 57'' UTM 10 (NAD 83)
Longitude 125º 27' 05'' Northing 6062220
Easting 341968
Commodities Copper Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Cache Creek
Capsule Geology

Mapping within the Trembleur ultramafic unit (Permian to Triassic? Cache Creek Complex) along the crest of the ridge northeast of Rubyrock Creek resulted in the discovery of several small outcrops of crowded biotite-feldspar porphyritic granodiorite with up to 15 percent disseminated and fracture controlled pyrite. These outcrops occur in a small saddle and define an area of sulphide mineralization that is at least 300 metres long and 200 metres wide. The extent of mineralization is constrained to the west by the occurrence of unmineralized serpentinite but is open in all other directions. A single sample collected from this locality contained 183 ppm copper. The discovery is considered significant because the style of sulphide mineralization and the nature of the porphyritic host rocks suggest the presence of a porphyry copper style hydrothermal system of probable Eocene age. Although no significant copper mineralization was located within the zone of disseminated and fracture controlled pyrite, followup work may locate a copper-rich zone associated with the porphyritic intrusions. (Geological Fieldwork 1998, page 34.)

Bibliography
EM OF 1999-11
EMPR FIELDWORK *1998, pp. 33-68
EMPR MIN POT MAP 1993-2
GSC MAP 631A; 907A; 1424A; 5313G
GSC MEM 252
GSC OF 2593, 3183
GSC P 90-1F, pp. 115-120; 91-1A, pp. 7-13

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