The Lac Lachance property, Windfall Lake, Lebel Sur-Quevillon, QC
Canadian Silver Hunters wholly owned Lac Lachance property is located in the Windfall Lake area of Quebec, near the town of Lebel sur Quevillon. The Company controls a total of 177 mining claims covering just over 9,900 hectares.
The Lac Lachance north and south block properties occur within the Urban-Barry greenstone belt located in the Northern Volcanic Zone of the Abitibi geological sub-province. The northern portion of the Lac Lachance claims cover electromagnetic anomalies associated with east-west trending fault zones on the northern limit of the Urban-Barry volcanic belt that hosts numerous gold deposits, including the Osisko Mining Inc., Windfall Lake Gold Deposit.
The nearby Windfall deposit is classified as a pre-Temiskaming intrusion-associated gold deposit due to: 1) a temporal and spatial association of gold with felsic calc-alkaline QFP (quartz-feldspar porphyry) intrusions; and 2) the main gold event (i.e., vein- and replacement-type mineralization) being interpreted to pre-date known regional scale deformation. Gold mineralization is structurally controlled and is hosted in: 1) a series of extensional faults and fractures that are concentrated in areas of contrasting competencies, often located proximal to the contacts between pre-mineral QFPs and host volcanic rocks; 2) along boundaries between flat-lying lithologies and steeper structures; and 3) along boundaries of chemical contrast between ultramafic-mafic and felsic rock types.
The mineralization style is variable (i.e., vein- to replacement-type) and is largely dependent on host rock composition. Mineralization consists of a network of quartz-pyrite veins and an associated silica-sericite-pyrite alteration assemblage. The QFP intrusions were emplaced as a product of tectonism and act as competent host rocks that localize favourable structures for gold- bearing hydrothermal fluids.
Recent work by Osisko in the vicinity of the Lac Lachance north claim group has indicated gold mineralization detected by diamond drilling associated with conductive sulphide zones. A 2018 Osisko report stated that drill hole OSK-UB-18-092, located within 900m of Canadian Silver Hunters claims, “intersected 0.71 g/t Au over 1 metre. This grade is hosted in a massive sulphide zone within a strongly silicified unit of intermediate composition. Other anomalous gold values were intersected, ranging from 0.11 to 0.48 g/t Au, associated to other massive pyrrhotite-pyrite zones, often located at their contacts”. (GM70939, Quebec Assessment Files).
The geological conditions that hosted gold mineralization on Osisko Mining’s Windfall Lake property also exist on Canadian Silver Hunter’s northern claims.
