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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  30-Nov-1996 by Keith J. Mountjoy (KJM)

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NMI 082E4 Cu2
Name LIBRA, LOST COPPER Mining Division Osoyoos
BCGS Map 082E022
Status Prospect NTS Map 082E04E
Latitude 049º 12' 48'' UTM 11 (NAD 83)
Longitude 119º 44' 45'' Northing 5454801
Easting 300033
Commodities Copper, Molybdenum Deposit Types G04 : Besshi massive sulphide Cu-Zn
Tectonic Belt Intermontane Terrane Okanagan, Plutonic Rocks
Capsule Geology

The Libra showing is located adjacent to Manuel Creek, 6 kilometres east of Keremeos, British Columbia. The showing was thought to be first discovered and staked in the 1930s. Property exploration and development included opencuts and a 15-metre inclined shaft. It was later restaked as the Libra 1-34 and Lost Copper 1-2 and explored by Libra Mines Ltd in 1967. A small pit was blasted into bedrock at the showing. Prado Explorations Ltd. optioned the property in 1967 and staked the adjoining Libra 35-62 claims.

The Libra showing lies within the Quesnel Terrane of the Intermontane tectonic belt. The Libra showing is hosted within a faulted package of Carboniferous to Permian Kobau and Anarchist groups and the Carboniferous to Triassic Shoemaker and Old Tom formations. These Mesozoic and older strata are overlain by Eocene volcanics of the Penticton Group.

The Libra showing is hosted in andesitic flows of the Old Tom Formation. The flows are of variable strike and dip in the vicinity, with a general north to northeast strike and steep dips. There is a weak banding in the andesite that appears to strike just east of north and dip 50 degrees to the west. Up to 3 per cent finely disseminated specs and blebs of pyrite, chalcopyrite, bornite and native copper occur in a slightly to well silicified, massive andesitic flow of the Old Tom Formation. The flow is about 90 metres thick. Copper mineralization occurs over a strike length of 365 metres. A select sample taken from the blast pit of Libra Mines Ltd. yielded 0.66 per cent copper, 0.01 per cent molybdenum and trace gold (National Mineral Inventory 082E4 Cu2). A 1.5-metre chip sample across the dip face of the pit yielded 0.15 per cent copper, 0.01 per cent molybdenum, trace gold and trace silver (National Mineral Inventory 082E4 Cu2).

Bibliography
EMPR AR 1968-273
EMPR ASS RPT 1154, *1697
EMPR OF 1989-5
EMR MP CORPFILE (*Prado Exploration Ltd.)
GSC MAP 341A; 538A; 539A; 541A; 15-1961; 1736A; 2389
GSC MEM 38; 179
GSC OF 481; 637; 1505A; 1565; 1969
GSC P 37-21
EMPR PFD 1630

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