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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  19-Jan-1992 by Peter S. Fischl (PSF)

Summary Help Help

NMI
Name NIGHTHAWK, TULAMEEN Mining Division Similkameen
BCGS Map 092H047
Status Showing NTS Map 092H07E
Latitude 049º 29' 12'' UTM 10 (NAD 83)
Longitude 120º 38' 12'' Northing 5484243
Easting 671162
Commodities Copper, Molybdenum Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Quesnel
Capsule Geology

The Nighthawk showing occurs on the west bank of the Tulameen River, 9.5 kilometres west-northwest of Princeton.

A stock of fine to medium-grained granodiorite and quartz diorite intrudes fine-grained amygdaloidal andesite with minor andesitic tuff and agglomerate of the Upper Triassic Nicola Group. The stock trends northwest along the Tulameen River for at least 300 metres. A similar stock hosts the Tulameen showing (092HSE111) across the river to the south.

The andesitic rocks are extensively chloritized near the intrusion. Minor epidote is also present. The granodiorite shows weak epidote and chlorite alteration.

Pyrite is the most common sulphide, and is concentrated in and around the intrusion as disseminations and in massive veins and shears. Chalcopyrite occurs along shears, fractures and in quartz veins in the altered andesite near the stock. Minor chalcopyrite is also found in quartz veins cutting granodiorite. Sparse molybdenite is disseminated in andesitic tuff just east of the intrusion.

Bibliography
EMPR ASS RPT *3655, *3905, 12676
EMPR GEM 1971-272; 1972-122
GSC MAP 888A; 1386A; 41-1989
GSC MEM 243
GSC P 85-1A, pp. 349-358
CJES Vol. 24, pp. 2521-2536 (1987)
EMPR PFD 650170

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