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NORTH BRENDA OVERVIEW
January 8, 2010
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In 2006, Bitterroot entered into an agreement to acquire a 100-percent interest in the North Brenda molybdenum/copper property, 30 kilometres west of Westbank in southwestern British Columbia. The 44 square-kilometre property adjoins the formerly-producing Brenda Mine, an open-pit molybdenum-copper porphyry deposit that produced 177 million tonnes of ore with an average grade of 0.043-percent Mo and 0.169-percent Cu from 1970 to 1990.
The North Brenda property has demonstrated potential for the discovery of sizeable areas of disseminated copper-molybdenum mineralization, as well as high-grade gold veins. In July 2009, nine trenches were excavated to test two areas hosting anomalous gold and silver-in-soil. The anomalies each measure approximately 400 by 150 metres and are located about 500 metres apart, along a NE-trending magnetic low that may be associated with a major fault zone. The soil anomalies are situated largely within clear-cut logged areas with excellent road access.
In one trench, a 30 centimetre-wide zone of clay-rich fault gouge, quartz veins, and disseminated pyrite assayed 71.4 grams Au/tonne and 24.4 grams Ag/tonne with selected samples within this zone assaying up to 187.5 grams Au/tonne and 71.8 grams Ag/tonne. Trenching has traced the mineralized structure over a 170-metre length within altered granodiorite. This is a geological setting similar to the nearby 650,000-ounce Elk/Siwash gold deposit. Additional soil sampling and geophysical surveying continued at North Brenda through the conclusion of the recent field season and will guide additional trenching in 2010.
In 2007, Bitterroot completed an initial 5-hole 1,397-metre drill program to test molybdenum and copper-in-soil geochemical anomalies coincident with Induced Polarization chargeability anomalies about 1-kilometre NNE of the Brenda open pit, along the previously documented mineralized trend. Outcrops near the drill sites contain molybdenite and chalcopyrite-bearing vein and fracture-controlled mineralization typical of that seen at the Brenda Mine.
Drilling results at North Brenda compare favorably with mineralized zones encountered at the Brenda Mine. Highlights included a 297.5-metre intercept of 0.058-percent Cu and 0.019-percent Mo (from just 1.5 metres below surface) and a 305.3-metre intercept of 0.058-percent Cu and 0.012-percent Mo (from just 1.0 metres below surface). These holes were drilled from a single setup approximately 800 metres NNE of the Brenda open pit, intersecting millimetre to centimetre-scale, molybdenum and copper-bearing veins emplaced in a likely continuation of the granitic intrusive body that hosts the Brenda deposit.
Initial drill results bode well for the discovery of additional mineralization within a 1.5-kilometre trend defined by highly anomalous molybdenum and copper-in-soil geochemistry and IP chargeability anomalies coincident with the strongest soil geochemical values. Furthermore, additional IP surveying and soil sampling performed in 2008 indicates that several high quality geochemical/geophysical targets remain untested. In 2010, Bitterroot's management plans to continue exploring for additional high-grade gold-bearing structures.
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