Bunker Hill discovers high-grade silver mineralization
TORONTO – Bunker Hill Mining Corp. is pleased to announce that it has discovered a previously unknown high-grade silver-lead (Ag/Pb) vein system as part of its on-going underground mine development activities.
Sam Ash, CEO stated: “Encountering this new vein through our current development in the upper part of the mine highlights the potential to add additional high-value tons to our existing mineral resources. Although extensively developed, much of the mine was not explored in a modern sense implying potentially significant upside to be discovered. Silver-lead vein style mineralization was the primary source of Bunker Hill’s early production, and we look forward to continuing to explore this emerging new target concurrent with the restart of operations.”
Located between two major fault structures, the vein is considered to be analogous to historically mined, low-angle extension structures which formed part of the “J” vein stopes. The “J” stopes historically produced over 1.1Mt with an average grade of 7.59 OPT Ag, 9.88% Pb and 0.59% Zn - therefore this newly discovered vein forms an attractive high-grade silver-lead target. The vein was intersected approximately 600 feet into the 1,600-foot planned decline ramp connecting the existing 5-level and 6-levels of the mine. Bunker Hill geologists have now completed a channel sampling program on the accessible portions of the structure (Table 1).
Mineralization from the channel sampled vein portion continues as a high-angle vein structure associated with the Sullivan fault to the east, providing an additional high priority exploration target, as historic stoping areas associated with high-angle vein mineralization on average showed substantially wider structural widths. Vein mineralization associated with the Sullivan fault formed the footwall mineralization to the historic March stopes which produced a total of 4.7Mt at an average grade of 5.22 OPT Ag, 12.03% Pb and 2.25% Zn. Stockwork vein mineralization extending from the extension structure to the west is seen to truncate into the foot wall of the Cate fault, but with a lack of historical development and drilling west of the Cate (hanging wall) the possibility to discover previously un-developed hybrid Silver-Lead-Zinc style mineralization remains open along both strike and dip.
The proximity of the structure to existing 5-level workings provides a readily available drill platform from which to further explore the extent of the vein. The Company plans to follow up with drill targeting of both the extension vein and high-angle target zones upon further advancement of drift development.