Sierra Nevada Gold (ASX: SNX) is pleased to announce plans to follow up drill hole BHD006 which returned up to 1270 g/t silver at Endowment Mine, part of its Blackhawk Epithermal project in Nevada, USA.
Highlights
Sierra Nevada to review potential for a large, high-grade epithermal silver-dominated vein system.Previously drilled core hole BHD006 returned 5m at 479 g/t Ag within a larger mineralised zone of 12m at 219 g/t Ag from 250m beneath the Endowment mine at its Blackhawk Epithermal Project in Nevada, USA.1This high-grade intercept is situated 150m vertically below the deepest portion of the historic mine and includes higher grade intersections of:0.5m at 1270g/t Ag from 256.5m1m at 823g/t Ag from 257m1m at 654g/t Ag from 258mThese silver intercepts are associated with very high-grade lead-zinc-gold (see table 1), demonstrating the potential for extremely high value ore.Potential for a company-making silver discovery at Blackhawk, where SNX has identified 22.5-line kilometres of high-grade silver-gold-lead-zinc veins.1Two shallow oxide resources (historic, non-JORC) estimated at Silver Gulch and Morning Star.1SNX has recently defined several high priority drill targets, and a multi-hole drill program is permitted.
SNX Executive Chairman Peter Moore said“These results which returned up to 1270 g/t silver from Blackhawk are very promising, coming from a vast and extensive vein network. We’ve identified 22.5-line kilometres of veins at Blackhawk, but this known mineralisation has sat largely untouched since mining ceased in the area in the 1920s. We have two shallow oxide resources which have not been defined to a JORC-compliant level but this provides us the opportunity to deliver value from an existing project with further drilling and mineral resource definition. Our 20-hole drill program is permitted and ready to drill, providing us with the opportunity to use modern exploration techniques to potential to return further high-grade results and shape this as a company-making discovery for Sierra Nevada.”
SNX has previously identified a large and high-grade intermediate sulphidation epithermal Ag-Au-Pb-Zn vein system, likely related to a large porphyry system located immediately to the south. Partially coincident with the porphyry system, the Blackhawk epithermal project vein system covers about 5km2 and is open under cover to the north and northeast, with 22.5-line km of veins identified to date (see figure 1).1
Previous drilling by SNX beneath the Endowment mine at Blackhawk returned 12m at 219 g/t Ag from 250m including 5m at 479 g/t Ag from 256m. This drill intercept is 150m vertically below the deepest portion of the mine and includes higher grade intersections of:
0.5m at 1270 g/t Ag from 256.5m (21.5% Pb + Zn)1m at 823g/t Ag from 257m (30.1% Pb + Zn)1m at 654 g/t Ag from 258m (+50% Pb+ Zn)
As shown in Table 1, the intersection described above comes with considerable polymetallic credits. The complete mineralised intersection of 12m at 219g/t Ag also contains 3.05% Pb and 8.54% Zn across the interval, significantly increasing the potential value of mineralisation within the vein/structures.
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