Detailed Study of the Bingo North and Bingo South Gold Showings, Dickens Lake Area, La Ronge Volcanic Belt

The Bingo North and Bingo South showings are part of a 300 m long brittle-ductile shear zone containing resources estimated at 81,000 ounces of gold. The mineralization occurs within the eastern margin of the Bernaski Bay granitic pluton, which intrudes the southern part of the La Ronge greenstone belt. The orientation and development of metre-scale, gold-bearing shear zones were greatly influenced by northwest-trending quartz-diorite dykes with which they are intimately associated. These small-scale shear zones exhibit evidence of a complex shearing history recorded by sinistral shear-sense indicators on horizontal surfaces and moderately to steeply northwest-plunging lineations in subvertical section. The auriferous shear zones are interpreted to be antithetic sinistral transpression zones developed during dextral transpression along the northeast-trending McLennan Lake Tectonic Zone, which juxtaposed the La Ronge Domain against the sedimentary Kisseynew Domain to the east.