Duquesne Mine Property (Gold)
Property Size: 5756 acres
Location: Duparquet Township, Quebec — The property consists of Mining Concession 377 and a group of unpatented mining claims surrounding the concession.
Historic production was 193,095 tonnes of ore averaging 10.81 g/t Au and was produced from 1946 to 1952 and from 1988 to 1992; totalling 2,086,946 g/Au.
The area of the workings covers approximately 200 metres width and 381 metres at depth.
Since 2007, Clifton Star have drilled some 143 drill holes for 50,321 metres over the west extensions and to depth; outlining 4 parallel gold-bearing veins; 3 of which are the same than the ones previously mined. The veins have been extended for some 1,250 meters laterally and down to depths of 932 metres vertically; with drilling on 50 to 100 metre centres. Metallurgical studies have shown the gold is 96% recoverable through cyanidation and flotation methods.
Using all drill data and a minimum 1 g/t Au cut-off, Genivar estimated in a NI 43-101 report, dated July 26, 2011, that the property contained Indicated resources of 1,859,000 tonnes at 3,33 g/t Au for 199,000 contained ounces and a further 1,563,100 tonnes at a grade of 5,68 g/t Au for 280,000 contained ounces, in the Inferred category.
The gold-mineralized zones occur within fault related structures lying between the footwall of a gabbro intrusive and the hanging wall of an ultramafic unit.
The mineralized zone lies immediately north of the Porcupine-Destor Fault and appears to be parallel to the main fault. Vein 10 and Vein 20 are the most promising gold-bearing systems with a third, Vein 74, associated with the north contact of the Porcupine Destor Fault.
Two properties immediately to the west of the Duquesne property, the Globex Duquesne West and the Normabec Pitt, are encountering similar grades and structures associated with mineralized systems immediately north of the Porcupine-Destor Fault. Grades and tonnages from both properties have been published.