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File Created: 22-Sep-1995 by Craig H.B. Leitch (CHBL)
Last Edit:  03-Jun-1998 by Larry Jones (LDJ)

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Name LEW VENT, LEW, LAURIE, LEWIS CREEK Mining Division Fort Steele
BCGS Map 082F040
Status Prospect NTS Map 082F08E
Latitude 049º 22' 20'' UTM 11 (NAD 83)
Longitude 116º 06' 38'' Northing 5469216
Easting 564570
Commodities Lead, Zinc, Copper, Silver, Tungsten Deposit Types E14 : Sedimentary exhalative Zn-Pb-Ag
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Laurie appears to be a new showing found by prospecting in an area where some old showings are known (the Royal Crown lead showing (082FSE064) is 2 kilometres to the east and the Cariboo lead-zinc-tungsten-uranium-silver showing (082FSE003) is 6 kilometres to the west). The most important mineralization discovered is 300 to 700 metres up North Moyie Creek from the crossing of the road following the upper Moyie River; it consists of what is described as stratiform to stratabound beds to irregular lenses or fracture coatings of sphalerite, galena, chalcopyrite and minor pyrrhotite. Other showings found elsewhere on the claims are mostly described as vein occurrences of quartz containing pyrite, chalcopyrite, rare bornite, and stained with limonite, malachite, and manganese oxides (pyrolusite?) at the surface. Old trenches, believed to occur on a Reverted Crown grant (name not given) a short distance northeast of the confluence of the Moyie River and the North Moyie Creek, expose a vein along a northeast-oriented Middle Proterozoic Moyie intrusion containing scheelite, galena, sphalerite and chalcopyrite. Silver is only known geochemically.

Host rocks are gently to moderately north dipping Middle Proterozoic Middle Aldridge Formation (Purcell Supergroup) sediments including siltstone, impure quartzite and argillite; known marker beds are presumed to place the showings stratigraphically. VLF-EM surveying located conductors attributed to structures.

The LEW group has been explored by Cominco over the period 1980- 1985 for sedimentary stratabound exhalative mineralization of the Sullivan type, mainly by UTEM (University of Toronto electromagnetic) survey searching for buried conductors supplemented by surface geochemistry. Although not reported in the assessment reports, detailed stratigraphy and geology are likely to have been completed. UTEM conductors were investigated by diamond drilling, which intersected minor stratabound, disseminated and veinlet lead-zinc mineralization, and established that the hostrocks are Middle Aldridge Formation (Purcell Supergroup) wackes and quartzitic wackes intruded by Middle Proterozoic Moyie gabbro sills.

In 1997, Sedex Mining Corp. (previously Otis J. Exploration Corp.) drilled approximately 1300 metres in 3 holes on the property. It is centred on the Lew "Vent", a tournalinized fragmental zone. Sedex had earlier found stratiform mineralization grading over 10 per cent combined lead and zinc.

EM EXPL 1997-46; 1998-68
EM GEOS MAP 1998-3
EMPR OF 2000-22
GSC OF 820; 929; 2721
GCNL #182(Sept.22), 1998