Rocks of the Barkerville Subterrane were subjected to an early period of ductile deformation that resulted in a westward directed, asymmetrical folds that plunge shallowly to the northwest. Post metamorphic open folds with upright cleavage are superimposed on earlier structures. During Late Cretaceous to Early Tertiary time, the terrane was disrupted by northwest trending dextral strike-slip faults. Northwest- and north-trending faults, with an important normal component and generally apparent right lateral displacements, record extension, probably associated with transcurrent movement. The north striking cross faults are an important control for the gold-bearing vein systems within the Cariboo Gold Belt.
West of the property lies the Quesnel Terrane, which comprises an early Mesozoic island arc assemblage consisting of basaltic, andesitic, pyroclastic, volcaniclastic and greywacke rocks. The Quesnel Terrane has been thrust west to east onto the Barkerville Subterrane, along the Eureka Thrust Fault. To the east, the Cassiar Terrane, a late Proterozoic to Paleozoic sequence of continental shelf clastic and carbonate rocks have been thrust from east to west onto the Barkerville Subterrane along the Pleasant Valley Thrust Fault.
The Swift River property is entirely underlain by Snowshoe Group rocks comprising the Keithley and Harveys Ridge Successions. The Keithley Succession consists of thin to medium bedded and interlayered light green to grey micaceous quartz and the Harveys Ridge Succession is characterized by grey to dark grey or black phyllite, schist, siltstone, sandstone to impure quartzite and mafic volcanic rocks.
Work Programs
During 2018 HAWKEYE completed a 148 line kilometre helicopter-borne geophysical survey over the Swift River property performed by Geotech Airborne Geophysical Surveys Ltd. The survey which was carried out at 150 metre line spacing identified several features of interest on the Swift River property. Two prominent northwest-southeast and northeast-southwest trending linear magnetic lows cross the property. The northwest-trending structure is offset in the northern half of the property along a 2 km northeast trend, before continuing off the property. The offset may represent a secondary structure offsetting a regional fault, or perhaps a dilational jog along a dextral strike-slip fault. The second magnetic low feature cuts the central part of the property, and may represent a regional structure that extends to the Cariboo Break, and may be causative of the Cariboo Break offset.