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Located in the western portion of the Athabasca Basin, a region known for hosting high-grade unconformity type uranium deposits. |
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5 high priority basement conductive zones identified by an airborne geophysical survey. |
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A drill program was carried out in fall 2008 to test one high-priority target. |
Brudell Lake consists of just under 200,000 acres of 100% owned land in the western region of the Athabasca Basin of Saskatchewan. An airborne survey conducted in 2007 identified five high priority targets displaying potential for high-grade unconformity deposits. Drilling to test one of these targets was carried out in fall 2008.
Location & History
The Brudell Lake property is located approximately 40 kilometres from AREVA Resources Canada Inc.'s formerly active Cluff Lake uranium mine which produced 62.5 million pounds U3O8, and the Shea Creek Project owned by AREVA and UEX Corp (TSX:UEX) with drill intersections that have assayed as high as 12.6% U3O8 over 11.9 metres.
The Athabasca Basin is widely recognized as the premier region in the world for high-grade unconformity-type uranium deposits like McArthur River and Cigar Lake. The region accounts for approximately 23% of the world's uranium supply.
Geology & Mineralization
The property covers a series of favourable large-scale, northeast-trending basement fault structures associated with regions of low magnetic susceptibility that indicate potentially favourable graphitic sedimentary rocks.
The property also occurs in a region of favourable intersecting, northwesterly-trending basement faults. Basement fault structures and electromagnetic conductors that trace favourable graphitic zones are key elements associated with large, high-grade, unconformity related uranium deposits in the Athabasca Basin. Such deposits include Cameco Corporation's (TSX:CCO) McArthur River and Cigar Lake mines located to the east. These are the world's largest high-grade uranium deposits.
The depth to the unconformity on the Brudell Lake property ranges from 800 metres to greater than 1,000 metres. Target depth of uranium mineralization in the basin can be up to 200 metres above and up to more than 200 metres below the unconformity. With today's deep penetrating electromagnetic (EM) systems, depths in excess of 1,000 metres can be assessed for unconformity type uranium deposits.
Exploration
A 14,000 line kilometre, deep penetrating VTEM survey was flown in early 2007 which identified five high priority targets. These five conductive zones (resistivity anomalies) range in length from 3 to over 7 kilometres and are spatially related with a region of strong structural uplifts and down drops associated with regional basement faults.
During early 2008, three of the strongest resistivity anomalies were followed-up by a detailed ground MT (magnetotelluric) survey. The MT survey confirmed the presence of strong conductive zones at and beneath the unconformity spatially associated with major magnetically inferred basement fault structures. These conductive materials may represent graphitic metasediments which are in most cases spatially associated with the host rocks for unconformity related uranium deposits in the Athabasca Basin.
An MT profile of one conductor zone - Hekelaar Lake - may be viewed at the right.
In late 2008, a single drill hole of 1,006 metres was completed at one target - Hekelaar Lake - to better understand the nature of the conductor. Although the cause of the conductor was not explained by the hole, and no anomalous radioactivity or strong alteration was encountered, systematic sampling of the Athabasca sandstone resulted in the definition of what are interpreted to be significant geochemical anomalies. In the 100 metres of sandstone above the unconformity, several zones of nickel, cobalt, lead, and boron enrichment were defined. These elements are commonly associated with unconformity related uranium deposits. In addition, 0.5 metres of split core immediately above the unconformity yielded 155 ppb gold. Finding these geochemical anomalies with this intensity in sandstone is encouraging, and warrants further investigation. The other four priority exploration targets have yet to be tested.
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Last updated May 29, 2009
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