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Early Stage Project

SELBAIE

Selbaie hosts IP anomalies along prospective structures

Overview

LaSalle’s Selbaie Property was acquired by map staking to cover the southeastern contact of the Brouillan Batholith. The property includes 8 claims, 100% held by LaSalle in the northern Abitibi greenstone belt (Abitibi) located 12 kilometers east of the historic Selbaie Mine.

History

The Selbaie Mine was discovered in 1974 as a result of drilling on an electromagnetic anomaly identified in an airborne electromagnetic survey flown in 1971. Selbaie was one of the largest producers of zinc, copper, gold and silver concentrates in Québec and by the end of 1996, underground operations in the A2 and B had mined 7.0 million tonnes of ore, and open pit operations in the A1 zone had mined 23.8 million tonnes of ore. Average grades were 2.02% zinc, 1.22% copper, 0.65 g/t gold, and 43.24 g/t silver. The mine was closed in 2004.

The Selbaie deposit is thought to have formed within a large caldera structure over the Brouillan Batholith. Regional work identified that the Brouillan Batholith is in fact a complex of several intrusive events including mafic gabbroic to granodiorite/tonalite intrusions flanked by volcanic sequences. Past exploration for Selbaie-type deposits have all focused on the volcanic sequence south of the Brouillan Batholith. 

Work completed by LaSalle includes a compilation of technical data, limited IP surveying, and prospecting. The compilation indicated that previous sampling returned up to 0.2% Cu within a felsic volcanic sequence intruded by syenite. Prospecting and IP surveying in this target area did not return positive results however two significant outcrops were uncovered. These include a strongly altered granodiorite cut by quartz veins and a breccia body hosting iron carbonate fragments, both of which support the thesis of gold mineralization potential near the sheared intrusive contact-oriented northeast. 

Details

Picture of DDH BL10-28 (28.4 g/t Au over 2.4 m) drill site. From archeological assessment report, Golder Associates, 2010.

Quartz veins in an altered granodiorite

The Selbaie Cu-Zn-Au-Ag deposit is located within the western pressure shadow of and along the southwest flank of the Brouillan intrusive, a central intrusion/resurgent dome complex. The Selbaie mine was operated by Billiton until 2004 and had a mining resource of 57 Mt composed of VMS type containing approximately 1 Moz Au (not a 43-101 compliant disclosure) considered to represent a sub-type volcanic associated sulphide deposit and epithermal vein and breccia-type mineralization associated with strong potassic alteration (porphyry Cu style).

Drill targets will primarily focus on IP anomalies along interpreted northeast and northwest structures as the ones controlling the B-14 mineralization 700 m south of our property. In 2013, Excellon reported visible gold and drilling results within the B14 Zone of:

Carbonate fragments in granodiorite.

Selbaie Property, Northern Abitibi Belt.

Next Steps