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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  01-Jun-1995 by George Owsiacki (GO)

Summary Help Help

NMI
Name BONNIE BRAE, LOBO, JOHN Mining Division Kamloops
BCGS Map 082L064
Status Prospect NTS Map 082L11W
Latitude 050º 39' 57'' UTM 11 (NAD 83)
Longitude 119º 17' 36'' Northing 5615175
Easting 337933
Commodities Silver, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Kootenay
Capsule Geology

The lower Paleozoic Sicamous Formation (Mount Ida Group) comprised of calcareous phyllite and limestone is underlain by schist of the Hadrynian and/or Paleozoic Silver Creek Formation (Mount Ida Group). This sequence is intruded by altered Cretaceous? granites and capped by Eocene volcanics of the Kamloops Group.

The Bonnie Brae workings expose a reticulate system of quartz veins striking north to northeast in highly sheared and fractured mica schists cut by porphyritic felsic dikes, adjacent to a granitic intrusion. Mineralization occurs along sheeted fracture zones and milky quartz veins and lenses 0.3 to 1.8 metres wide, and comprises pyrite, sphalerite and argentiferous galena. Pyrrhotite occurs locally in lower workings. Silicification is prevalent.

A number of opencuts along a northeast trend exposes a series of the quartz lenses. A tunnel had been driven for 21 metres in a general southerly direction, following the course of a porphyry dike which lies on the west side of a zone of shearing. Between 1967 and 1969, seven trenches were completed totalling 548 metres, and 2 diamond-drill holes were drilled totalling 609 metres.

Bibliography
EMPR AR 1926-188; *1930-A183,A184; 1967-135
EMPR ASS RPT 12055, *17144, 19867
EMPR GEM 1969-240
EMPR PF (General File - Dawson, G.M. (1898): Geology map of Shuswap Sheet)
GSC MAP 1059A
GSC MEM 296, p. 142
GSC OF 481; 637 (Occurrence 184)
GSC P 48-4; 74-1A, pp. 25-30; 86-1A, pp. 81-88; 89-1E, pp. 51-60
CJES Vol.21 (Oct.1984), pp. 1171-1193

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