Like the vast majority of Balmoral’s Detour Trend Project the Harri Property is extensively overburden covered with the only known rock exposures being located along or near the Harricana River, where it bisects the property. These outcrops are dominantly mafic volcanic rocks featuring varying degrees of structural deformation. Thus the majority of the geological information concerning the Property comes from drilling completed to date and available geophysical data including a detailed 2011 airborne magnetic and EM survey completed by Balmoral.
With the very limited historic work (drilling) completed on the Harri Property the bulk of the geology is interpreted to be a mafic volcanic dominated sequence with less interflow, greywacke type sedimentary units and minor felsic volcanic and intrusive lithology’s. Magnetic data suggests limited mafic intrusive activity. Along the southern margin of the Property what is interpreted to be an anticlinal-dome type feature exposes a core of sedimentary rocks which are not easily assigned in the current stratigraphic model for the Harricana-Turgeon belt. This latter feature is surrounded by an extremely electromagnetically active region which features several sulphide and graphite bearing sedimentary and lesser volcanic units.
The Sunday Lake deformation zone, which flanks the Harri Property to the south, is only sparsely tested across the Property and on adjacent properties. As on the Martiniere Property to the west the Sunday Lake appears to be resolvable into a single 200-300 metre wide deformation corridor.
A prominent north-trending, late (Proterozoic?) dyke cuts across the east-west trending structures and stratigraphy on the east side of the Harri Property. Significant movement (both lateral and vertical) is interpreted across this feature which appears to fill a NW fault structure. The Bug Lake Gold Trend on the adjacent Martiniere Property features a similar orientation.