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Click here to view the Kalzas Project Summary
The Kalzas project is located 71 kilometers southeast of the town of Mayo in the central Yukon in the Mayo Mining District.
The Kalzas property lies within the Selwyn tungsten belt (Fig. 1). The belt includes Mactung (32 Mt at 0.92% WO3 reserves – Dawson, 1995), one of the top three of the world’s known tungsten deposits, and Cantung (9 Mt at 1.42% WO3 production plus reserves — Dawson, 1995), Canada’s largest historical tungsten producer. Numerous other known deposits and showings include Ray Gulch, Clea and Lened, and a W-Mo deposit known as Logtung. Coincidentally, this belt partially overlaps the Tintina gold belt.
FIG. 1
HISTORY
Tungsten mineralization was first discovered at Kalzas in 1978. Union Carbide, carried out exploration at Kalzas in the early 1980's and believed it to have world class potential. In 2005, Copper Ridge Explorations Inc. ("Copper Ridge"), completed a five-hole drill program which confirmed the continuity of mineralization beneath the mineralized trenches as discovered by Union Carbide.
GEOLOGY
The tungsten mineral wolframite occurs in sheeted veins, stockworks and disseminations. Within the roughly 1.5 square kilometer zone of mineralization, higher grade zones occur in competent quartzite and siliceous conglomerate beds that are steeply dipping and strike northwesterly across the property. Additional drilling will be required to demonstrate the continuity of any high-grade mineralization within these stratigraphically controlled zones.
The mineralized zone is believed to be underlain by a 90 million year old Tintina Gold Belt intrusion. Coincidentally, many of the Tintina Gold Belt gold deposits, including Scheelite Dome, are known for their tungsten association. At Kalzas, arsenic, bismuth and antimony occur within the core area of the tungsten deposit, suggesting the possibility of gold mineralization closer to the interpreted intrusion.
The deposit is ideally situated on the upper slopes of a mountain ridge that would allow ready access for mining with a low stripping ratio and downhill transport for ore to a processing facility.
MINERALIZATION
Wolframite, a tungsten mineral and cassiterite, a tin mineral, occur with a number of other minerals, including scheelite, molybdenite, galena, beryl, arsenopyrite, quartz and feldspar in sheeted quartz veins, stockworks and breccias within the alteration zone. Copper Ridge undertook a work program that included rock chip sampling of exposures along roads and trenches and re-sampling of some of the drill core. Highlights of the sampling, within an area 500 m long and 300 m wide, include:
Copper Ridge's 2001 Trench Sampling Highlights
Trench Width Grade
(m) (% WO3)
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South Upper Road 66 0.493%
North Upper Road (east end) 16 0.306%
North Upper Road (middle) 8 0.705%
North Upper Road (west end) 70 0.427%
North Middle Road 20 0.268%
North Lower Road 66 0.429%
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(WO3 is tungsten trioxide, the common method in which tungsten grades are reported.)
In 2002, Copper Ridge completed a more detailed sampling program with the collection of 121 chip channel samples, mostly of one metre in length and 7 to 9 kg in weight. Large samples were collected in an effort to mitigate the issue of heterogeneous samples, including a possible nugget effect resulting from the presence of coarse crystals of the tungsten mineral wolframite in some of the sample intervals. All samples over 0.2% WO3 in the original geochemical analysis were assayed. The sampling program was conducted under the supervision of Aurum Geological Consultants Inc. and Acme Analytical Laboratories Ltd. carried out analytical work.
Copper Ridge's 2002 Trench Sampling Highlights
Location Length
(m) % WO3
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Lower Levels 4.0 0.539
Middle Road 2.0 0.605
Middle Road 3.0 0.783
Middle Road 1.2 1.211
Upper Levels 2.0 0.902
Upper Levels 1.0 1.097
Upper Levels 1.0 1.665
Upper Levels 8.0 0.608
Upper Levels 0.4 3.165
South Upper Levels 6.0 0.712
Including 2.0 1.669
South Upper Levels 2.5 1.266
South Upper Levels 15.0 0.597
Including 2.0 2.552
Including 6.0 1.219
Geological observations suggest that these high-grade zones would have a steep and elongate orientation within a zone up to 100 m wide and approximately 400 m along strike.
 Technical Report NI 43-101
Henry Neugebauer, P.Eng., is the Company's Qualified Person.
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