The oldest assemblage of rocks in the Red Lake area is the Balmer assemblage (2860-2840 Ma), which is generally comprised of primarily massive tholeiitic basalts with minor felsic volcaniclastic rocks and metasedimentary rocks (Stott and Corfu, 1991). This assemblage is unconformably overlain by the younger Confederation assemblage (2742-2732 Ma), which generally is comprised of intermediate pyroclastics with minor rhyolitic flows and tuffs built on a sequence of mafic to intermediate pillowed flows (Stott and Corfu, 1991). Outcrop exposure becomes diminished eastward as the blanket of glacial overburden increases and topography flattens; best exposures are found on lakeshores and riverbanks. The generally flat topography of the Uchi Subprovince is interrupted by low glacial moraines, eskers, drumlins which are elongated to the southwest.
Map of the Superior Province of the Canadian Shield showing the subprovinces.
The key features of lode gold deposits in the Red Lake belt can be summarized by the following generalizations (Sanborn-Barrie et al., 2000; Gosselin and Dubé, 2005):
The Red Lake Mining Camp has a long history of gold exploration, discovery and production. The area comprising and surrounding the Property is no exception, with seven gold occurrences, four discretionary gold occurrences and two past gold producers situated in the immediate region of the Property (Figure 4-2 and Table 7-1). The following offers a brief summary of some of the more significant gold occurrences and past producers which are hosted by similar geology (quartz diorite intrusive – Howey Diorite) that underlies the Property.
Table 7-1: Gold occurrence within and proximal to the Dome Property (http://www.mndm.gov.on.ca/mines).
OC = occurrence; DO = discretionary occurrence; P = prospect