Business
Tower Resources Reports up to 96.9% Gold Recoveries from Initial Metallurgical Test Wok at JD Property
(via Thenewswire.ca) Vancouver, B.C. - Tower Resources Ltd. Reports the results of prelimi...
About this update from Tower Resources Ltd.
[{"type":"text","content":"Tower Resources Reports up to 96.9% Gold Recoveries from Initial Metallurgical Test Wok at JD Property(via Thenewswire.ca)\n \n \nVancouver, B.C. - Tower Resources Ltd. Reports the results of preliminary metallurgical testing on samples from the JD Gold Project in the Toodoggone Gold District of north central British Columbia. The JD Property is comprised of over 15,000 hectares located approximately 50 kilometres north of Aurico Gold Inc's past producing Kemess Mine.\n\n \n \nA composite sample of drill core from drill hole JD-12-001, drilled within the Finn Zone (see Tower's August 29, 2012 News Release), was selected for initial testing, in particular samples from 23 to 45 meters down hole were chosen. The average grade of the composite is 1.25 g/t Au and 24.70 g/t Ag. The sample was selected to represent different lithologies and alteration assemblages associated with lower to moderate grade mineralization within the Finn Zone. This was deemed a critical first step because high extraction of gold from lower-grade material will add to the overall economic potential of the project.\n\n \n \nThe sample was submitted to Inspectorate Exploration & Mining Services Ltd. in Richmond B.C. and was subjected to three tests including gravity concentration at two grind sizes and cyanide leach and flotation assessment at three grind sizes each.\n\n \n \nThe samples subjected to centrifugal gravity separation at a grind size of P80 100 microns yielded a recovery of 47.8% of the gold and 13.5% of the silver.\n\n \n \nThe samples responded well to bottle-roll leach testing with an average of 86.5% gold extraction and 55.8% silver extraction at a grind P80 size of 100 microns. The leach kinetics responded well to finer grinding with maximum gold extraction occurring in less than 40 hours at P80 at 75 microns. At this grind size, 82.7% gold extraction and 55.8% silver extraction was attained.\n\n \n \nIn the flotation test gold recoveries of up to 96.9% at grind size of P80 75 microns and silver recoveries of up to 92.5% at P80 100 micros were attained after 8 minutes of flotation. Gold recovery reportedly increased with decreasing grind size.\n\n \n \nIt is recommended by Inspectorate to pursue a sequential gravity - flotation and gravity - cyanide leaching tests to evaluate combined metal recoveries. Finer grinding is recommended prior t...