Geology:

At the Black Fox Mine, the DPFZ consists of a series of faults that transect mafic and ultramafic lithologies of Archean volcanic rocks. The package of deformed strata and shear zones strike roughly northwest-southeast and dip to the southwest at about 40 degrees near the surface, and in places, up to 60 degrees with depth. The mineralization is generally restricted to an ankerite alteration zone of 60–350 feet in thickness cut by several stages of felsic dikes and sills. The mineralized zones pinch and swell, but appear to be open at depth and to the east and west. Gold occurs as free gold associated with several stages of quartz veins and quartz stockworks in green carbonate and ankerite altered ultramafic rocks, and as gold associated with fine-grained pyrite within bleached ankerite-sericite altered mafic volcanic rocks.

The Black Fox mine sits astride the Destor-Porcupine Fault Zone (DPFZ), which is a deep break in the Precambrian rocks of the Abitibi Greenstone Belt. This fault system hosts many of the deposits in the Timmins area. The system regionally strikes east-west and dips variably to the south. Black Fox lies on the southern limb of a large scale fold on a flexure in the DPFZ Fault where the strike changes from east-west to southeast. Folded and altered ultra mafic and mafic are the host rocks for mineralization. Gold occurs as free gold in quartz veining and stockworks in altered ultra mafics and in gold associated with pyrite in altered tholeiitic basalts.