The Thunder Creek and 144 properties are part of the Timmins West mine complex in Ontario. The deposits all occur along the 144 Trend, a broad structural corridor that is host to extensive gold mineralization. The gold occurs in steep north-northwest plunging zones within and proximal to the 144 Trend and related structures.
Thunder Creek is an underground mine that has been in production since 2010 and has produced more than 500 kozs of gold. Primary mining methods include longitudinal and transverse longhole stoping and ore is hoisted to surface via a shaft and trucked to the Bell Creek mill for processing. Ore is processed with single-stage crushing and grinding with a portion of the gold recovered by gravity methods, followed by pre-oxidation and cyanidation with carbon-in-leach and carbon-in-pulp recovery. The Probable Reserves at Thunder Creek as of Jan. 2018 totaled 0.47 Mt at 2.9 g/t gold (2.0 g/t cut-off ).
Drilling activity at the 144 project led to the discovery of two significant zones of gold mineralization about 750 metres to the southwest of Thunder Creek, the 144 Gap Zone and the 144 Gap SW Zone. The Proven and Probable Reserves as of Jan. 2018 at 144 Gap are 5.01 Mt grading 3.15 g/t for 496 kozs of gold (2.0 g/t cut-off ).
Progress continued to be made on the infrastructure at 144 Gap which included ramp, raise and lateral development to access the resource. Underground infill and definition drilling has totaled 20,487 metres during the first half of 2018.
Tahoe is focused on optimizing operations at Timmins West in 2018. Efforts to rework the mine plan are underway in order to enhance flexibility in the stoping sequence and to maximize the development of stopes in ore.