YUKON – Vancouver-based YUKON ZINC CORP. has completed test mining a 5-tonne bulk ore sample from its Wolverine project in the Finalyson District. The sample will be sent for metallurgical testing and to provide pastefill and dense media separation information. HATCH ASSOCIATES is working on the first draft of a feasibility study to be ready in January 2006. A production decision could follow. Yukon Zinc submitted an environmental assessment report for the project on Nov. 3 to the territorial authorities.
A 5X5-metre decline, suitable for use as the main haulage ramp, was driven to the upper end of the Lynx zone. An access was then driven to the ore and 110 metres of strike length was exposed in a test stope. In particular, the argillite rocks in the hangingwall to the ore were more competent than indicated by drilling. The ore is very massive and provides a very good back for stope access and development, and the ore contacts are sharp and easily followed in development, reported Yukon Zinc. The sharp contacts to ore are favourable for the application of the dense media separation circuit that will remove any waste material in a pre-concentration step, to ensure a continuous stream of high-grade ore to the mill.
The test mining also examined the development of panels using a herringbone pattern of alternating stope panels and pillars. The stope plan was developed in relatively thin massive sulphide ore and worked well, with each panel exposing the hangingwall argillite and experiencing minimal dilution. This mine method will provide multiple active faces on each stoping level, providing the operation with high productivity and good mine plan flexibility.
Definition drilling is nearly completed and new reserve/resource estimates will be complete in December. Previous numbers for the resource base are posted at www.YukonZinc.com.