Blackhawk Porphyry and Epithermal Copper/Gold Projects

The Blackhawk Project is located within the Excelsior Mountain Range, Mineral County, Nevada. The Blackhawk Project is accessed via paved state highway 95 and is 40 minutes’ drive from the regional hub of Hawthorne. Local access to the Blackhawk Project is gained by an all-weather county gravel road via the abandoned mining township of Marietta.

Sierra Nevada has identified two major and extensive components of a large mineralised system at its Blackhawk Project – an epithermal component and a porphyry component. The Blackhawk epithermal vein system is prospective for high grade, structurally controlled Ag-Au and base metal deposits and is partially coincident with and adjacent to the northern edge of the Blackhawk porphyry-style alteration and mineralisation. At least eight historic mining areas were operated in the Blackhawk epithermal vein system between the 1860s and the early 1900s, the main mining areas being around the Endowment, Morning Star and Blackhawk mines. The epithermal vein system covers an area of approximately 5km2 and contains up to 22-line kilometres of mostly untested veins. Sierra Nevada has obtained bonanza grade precious and base metal rock chips from the epithermal vein system and has a suite of drill ready targets.

The porphyry system is defined by a world class scale, fertile alteration system more than 30km2 in size. Centrally the porphyry system is marked by a 4km diameter ring of historic mines that have exploited various porphyry style mineralisation types which is, in turn located coincident with a large 13km2 zone of high chargeability (sulphides) defined by IP geophysics. The porphyry system is regarded as having significant potential to host world-class porphyry-related Cu-Au mineralisation. The Blackhawk Project consists of 636 contiguous 20 acre claims covering 49km2 and is close to existing highways and extensive infrastructure.

Favourably located in southern Nevada, the Blackhawk Project occurs within the prolific Walker Lane Trend, which is a Tier-1 mineral province that hosts numerous world class gold, copper, and silver deposits. The Walker Lane Trend is defined as the boundary between the Great Basin Extensional Province to the north and the Sierra Nevada Block to the south. It is a zone of dextral strike-slip/transtensional deformation and merges with the Southern California Shear Zone to the southeast. The Walker Lane Trend contains the giant Round Mountain deposit (20Moz gold which is owned and operated by Kinross Gold), the legendary Comstock Lode (8.5Moz gold and 200Moz silver, which has been mined by multiple parties), the Yerington Porphyry deposits (over 4Mt copper in production and Reserves relating to multiple parties); the Candelaria deposit (230Moz silver of previous production and current Resources, which currently owned by Silver Standard and is 25km along trend to the southeast of the Blackhawk Project); and various other multi-million ounce gold deposits. The estimated production and Reserve endowment of the Walker Lane Trend is at least 50Moz of gold, 700Moz of silver, 4Mt of copper.

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We're pleased to provide our June 2022 Quarterly Report - our first since our #ASX listing in May:

We expanded our #copper-#gold footprint & understanding at the Blackhawk porphyry project, Nevada, USA with plans to #drill at Blackhawk in Q3


$SNX drilling key targets at Blackhawk Porphyry Project, USA:

SNX has planned up to three holes for 2,500m to test several key positions which have undergone progressive modelling, using a wide range of exploratory techniques.

#gold #copper

IP survey of our Blackhawk #copper-#gold porphyry
project in Nevada, USA has expanded the sulphide footprint associated with the project:

Drilling Blackhawk porphyry targets is expected in Q3 CY2022. $SNX

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