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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  09-Apr-08 by Mandy N. Desautels(MND)

Summary Help Help

NMI 082E11 Mo1
BCGS Map 082E055
Status Developed Prospect NTS Map 082E11E
Latitude 49º 31' 05" N UTM 11 (NAD 83)
Longitude 119º 10' 04" W Northing 5487306
Easting 343100
Commodities Molybdenum, Copper, Uranium, Silver, Gold Deposit Types L05 : Porphyry Mo (Low F- type)
D06 : Volcanic-hosted U
Tectonic Belt Omineca Terrane Plutonic Rocks
Capsule Geology

The CARMI MOLY deposit is located approximately 10 kilometres northwest of Beaverdell and 45 kilometres south-southeast of Kelowna.

Initial work in the area was conducted by Kennco Exploration Limited following the identification of molybdenum anomalies in the Beaverdell area by a 1960 reconnaissance stream geochemical survey. Between 1961 and 1980 a major exploration effort was focused on this area by a number of independent exploration companies including International Minerals and Chemicals Limited, Husky Oil Limited, Granby Mining Corporation, Craigmont Mines Limited, Union Oil Company of Canada Limited and Vestor Explorations Ltd. Work included: detailed geological mapping and prospecting; soil, water and silt geochemistry; bulldozer trenching and chip sampling; detailed shallow and deep penetrating induced polarization, resistivity and magnetometer surveys; and percussion and diamond drilling. In 1985 Vestor Explorations Ltd. and Dynamic Oil Limited carried out a limited percussion drilling program. In 1990, Placer Dome Inc. executed a 3-hole diamond drill program. A total of approximately 21,533 metres of drilling has been carried out on the property in 140 percussion-drill holes and 48 diamond-drill holes.

An unnamed Middle Jurassic intrusion overlies a partially unroofed stock of the Valhalla Complex (Tertiary?). The Jurassic intrusive rocks are medium-grained foliated biotite granodiorites, cut by smaller bodies of related quartz diorite and quartz monzonite. The Valhalla Complex is a leucocratic muscovite-biotite quartz monzonite with several late-stage derivatives, including feldspar porphyry dikes and the matrix of the mineralized breccia zones.

Two mineralized breccia zones, the E and Lake zones, are localized within a thin fault-dissected cover of Nelson granodiorite.

The E zone breccia is characterized by a series of flat-lying to gently-dipping tabular breccia bodies along a 110 degree strike, over a length of 1800 metres with a width up to 500 metres. In the central part of the E zone breccia, the matrix is granodiorite intermixed with pegmatite, quartz, aplite, muscovite and biotite. Molybdenite occurs as rosettes within fragments, as thin lamellae on fragment/matrix boundaries, and as discrete flakes within the matrix. Where alteration within the breccia zone is intense, a greisen zone, consisting of quartz, muscovite, fluorite, sericite, epidote, chlorite and molybdenite, is developed in alaskite stocks of the Valhalla Complex. Pyrite, magnetite, chalcopyrite and minor bornite occur as fracture-fillings, blebs and disseminations within the mineralized zones. Associated uranium mineralization, represented by brannerite, is sporadically disseminated in the granodiorite, accompanied by purple fluorite. A drillhole (V8) intersected 0.038 per cent uranium (0.045 per cent U308) and 0.336 per cent molybdenum over 10.7 metres (Assessment Report 5203). This intersection, from 93 to 104 metres, included a 7.6 metre intersection of 0.05 per cent uranium (0.06 per cent U3O8).

The Lake Zone is about 750 metres west of the E zone. It dips steeply north and strikes 110 degrees. It is about 600 metres long, up to 150 metres wide and extends up to 400 metres depth. The matrix of the breccia consists of quartz monzonite intermixed with pegmatite, abundant quartz and aplite. Within the porphyry, quartz-sericite alteration zones form along incipient fractures. These zones average 15 centimetres in width and locally are up to 6 metres wide. Disseminated molybdenite occurs within the sericitized rock. Silver and gold values were also reported in core (Assessment Report 5203).

The porphyry-breccia deposit is thought to have evolved by explosive venting of the underlying stock with breccia formation in structurally controlled cap rocks. Simultaneous magmatic emplacement of mineral phases from the stock developed in breccia voids. Subsequently, mineralized greisens formed in root zones of the stock.

Total drill indicated open pitable resource, calculated in 1985, is 17.0 million tonnes grading 0.063 per cent molybdenum (0.105 per cent MOS2) for the E Zone and 3.7 million tonnes grading 0.066 per cent molybdenum (0.110 per cent MOS2) for the Lake Zone (Assessment Report 16102). In 1979, the total estimated open pitable geological resource, including the drill indicated resource, was 27 million tonnes grading 0.05 to 0.10 per cent MoS2 for the E Zone and 13 million tonnes grading 0.05 to 0.10 per cent MoS2 for the Lake Zone (Assessment Report 16102). In addition, at depth in the Lake Zone a drill indicated resource of about 4.5 million tonnes of over 0.2 per cent molybdenum (0.33 per cent MOS2) occurs over an average 8.5-metre width (Assessment Report 16102). This resource is not amenable to open pit mining.

In 1990, Placer Dome Inc. drilled 3 diamond-drill holes which were positioned parallel to 3 old percussion holes. The results indicated that considerable down-hole contamination took place in the original percussion drilling, especially near the hole bottoms. The impact of this on the ore reserve potential of the property is unknown. The weighted average content of uranium and thorium in the 1990 drill holes are 7.6 and 8.3 parts per million respectively (Assessment Report 20275). This is slightly higher than a normal average for uranium in an acid intrusive rock, and approximately one-half of what could be considered a normal average for thorium (Assessment Report 20275).

EMPR AR 1962-68
EMPR ASS RPT *3740, *5203, 5204, 5430, 5519, 5860, 6023, 6276,
EMPR EXPL 1975-25,26; 1976-31; 1977-33,34; 1978-33,34; 1979-41,42;
1980-41; 1985-C29,C30
EMPR FIELDWORK 1975, p. 30
EMPR GEM 1970-408; 1971-386; 1972-44; 1973-50; 1974-60,61
EMPR GEOLOGY *1975 pp.36,37
EMPR MAP 22; *29; 65 (1989)
EMPR OF 1990-32; 1992-1; 1994-8
EMPR PF (Vestor Explorations Ltd. (1974): Description of Carmi Moly Property; Craigmont Mines Limited (1976-08-30): Cross-section of Carmi Area - E Zone; Craigmont Mines Limited (1976-08-30): Magnetic Survey of Carmi Area; Kenyon, J.M. and Morton, R.D. (1976-11-01): The Carmi Mo-(U) Deposit; Vestor Explorations Ltd. (1979): Drill Hole Summary)
EMR MP CORPFILE (Vestor Explorations Ltd.; The Granby Mining
Company Limited; Craigmont Mines Limited; Dynamic Oil Limited)
EMR MIN BULL MR 223 (1989) B.C. 18
GSC MAP 538A; 15-1961; 1701A; 1712A; 1713A; 1714A; 1736A;
7686G; 8510G
GSC OF 409; 551; 736; 1969
CIM Mar. 1978, Vol.71, No.791, p. 128; Aug., 1980, p. 92
CIM Special Volume 15 (1976), Table 1, No. 1, in pocket.
CMH 1986-87, p. 381
GCNL #239, 1976; #36,#38,#128,#172,#184,#220, 1977; #184, 1978;
#150,#187, 1979; #105, 1980; #158, 1982; #58, 1983; #62, 1984;
#103, 1989; #5, 1990
N MINER Mar.3, May 5, Sept.8,29, Nov.17, 1977; Oct.18, 1979
W MINER June 1977, p. 20; *Feb. 1980, pp. 59,60
Kenyon, J.M. (1978): Mo and U Mineralization with Special Reference
to a Mo-(U) Deposit at Carmi, B.C.; M.Sc. Thesis, University of
Alberta (Abstract in CIM Nov. 1980, p. 28)
Placer Dome File