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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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Name FOB, RAD, VAC Mining Division Osoyoos
BCGS Map 092H020
Status Showing NTS Map 082E04W, 092H01E
Latitude 049º 10' 00'' UTM 11 (NAD 83)
Longitude 120º 00' 00'' Northing 5450317
Easting 281320
Commodities Molybdenum, Copper, Silver, Gold Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Okanagan, Plutonic Rocks
Capsule Geology

The FOB showing is located at 740 metres elevation near the east bank of the Ashnola River (Assessment Report 6173). Keremeos, British Columbia lies 13 kilometres to the east-northeast.

The showing was staked and explored in 1976 and 1977 by Consolidated Kalco Valley Mines Ltd. Exploration initially consisted of geological mapping, geochemical soil surveys and magnetometer, electromagnetic and self potential geophysical surveys. This was followed up by three surface diamond-drill holes on the FOB 2 claim, totalling 322 metres.

The oldest rock units in the area are Carboniferous to Triassic Old Tom and Shoemaker formations. These consist of chert, argillite, mafic volcanic flows and minor limestone beds. The Old Tom and Shoemaker formations have been intruded by the Middle Jurassic Similkameen intrusive. The composition varies from hornblende diorite to quartz diorite. Intrusive dike swarms have accompanied the Similkameen intrusion. Pervasive regional metamorphism is of upper greenschist to lower amphibolite facies. Superimposed on top of this is a later thermal contact metamorphism.

The showing consists of molybdenite and minor chalcopyrite mineralization hosted in andesitic tuff, greenstone, grey feldspar porphyry dikes and granodiorite.

The best molybdenite values from drilling were from holes KV #1 and KV #3. Drillhole KV #1 yielded 0.10 per cent MoS2 (0.06 per cent molybdenum) over the 10-metre interval between 480 and 490 metres (Sample 10468) (Assessment Report 6173). From drillhole KV #3, sample 830 yielded 0.21 per cent MoS2 (0.12 per cent molybdenum) over the 10-metre interval between 20 and 30 metres (Assessment Report 6173). In the same hole, sample 867 yielded 0.19 per cent MoS2 (0.11 per cent molybdenum) over the 10-metre interval between 240 and 250 metres (Assessment Report 6173).

EMPR GEM *1976-E25; *1977-E23
EMPR OF 1989-5
GSC BULL 239, pp. 137-139
GSC MAP 341A; 538A; 539A; 541A; 15-1961; 1736A; 2389
GSC MEM 38, pp. 448-458; 179
GSC OF 481; 637; 1505A; 1565; 1969
GSC P 37-21, pp. 37-40
American Journal of Science Vol. 237, pp. 527-549