Black Bear Minerals has extended high-grade silver intercepts outside its existing Shafter Mineral Resource Estimate, with assays up to 1,333g/t Ag and promising polymetallic potential, advancing resource validation and mine restart plans.
- High-grade silver intercepts up to 1,333g/t Ag
- Twin drilling validates and exceeds historic results
- Polymetallic mineralisation with zinc, lead, gold detected
- Plans underway for JORC resource conversion and infill drilling
- Existing infrastructure supports potential rapid mine restart
High-Grade Silver Intercepts Extend Beyond Current Resource
Black Bear Minerals (ASX:BKB) has delivered a fresh batch of high-grade silver results at its Shafter Silver Project in Texas, with diamond drilling intercepts reaching up to 1,333 grams per tonne (g/t) silver. Notably, hole SFD020 returned 11.9 metres at 148g/t Ag including a blistering 0.5 metres at 1,333g/t Ag, while SFD022 intercepted 3.8 metres at 171g/t Ag including 1.1 metres at 328g/t Ag. These results not only confirm the presence of robust silver mineralisation but also extend beyond the boundaries of the existing 17.5 million ounce foreign Mineral Resource Estimate (MRE), signalling potential resource expansion.
The twin drilling program, designed to validate historic holes drilled by AMAX in the 1940s and Gold Fields in the 1980s, has consistently delivered thicker and higher-grade intercepts than their historical counterparts. For example, SFD020 twinned hole SD183, which had previously recorded 5.8 metres at 109g/t Ag, while SFD022 outperformed AMAX1261’s 0.9 metres at 157g/t Ag. This systematic validation strengthens confidence in the historic dataset, which lacked comprehensive QAQC data and modern sampling protocols.
Polymetallic Potential Adds New Dimension to Shafter
Beyond silver, Black Bear’s recent exploration has uncovered significant polymetallic mineralisation, including zinc, lead, and gold, which were not previously incorporated into the foreign MRE. Drillhole SFD024, targeting the southwest area near the MacDaniel Structural Corridor, intercepted 10.7 metres at 3.3% zinc, including a high-grade 1.7 metres at 19.8% zinc with accompanying lead and gold credits. Other holes also reported notable base metal grades, suggesting Shafter’s mineralisation is more complex and potentially more valuable than a silver-only resource.
This polymetallic discovery opens avenues for metallurgical testwork to evaluate by-product credits that could enhance the project's economics. Black Bear is actively re-logging and sampling historic core to better understand the distribution of these commodities and aims to incorporate them into a forthcoming JORC-compliant resource update.
Strategic Steps Toward JORC Conversion and Mine Restart
Black Bear is progressing resource validation with check analyses underway to assess whether historic analytical methods may have underrepresented silver grades. Results are expected within four to six weeks. The company plans limited infill drilling to support a maiden JORC Mineral Resource Estimate and is advancing technical studies for a Rapid Mine Restart, leveraging Shafter’s existing infrastructure, including a permitted Merrill-Crowe processing plant and extensive underground workings.
The Shafter Project’s location within the prolific Sierra Madre Belt, home to Newmont’s Peñasquito mine, the world’s fifth-largest silver producer, adds strategic weight. The project’s historic production of 35.2 million ounces of silver at an average grade of 521g/t further underscores its potential as a high-grade silver asset.
Broader Portfolio Remains in Focus
Alongside Shafter, Black Bear continues to advance its Independence Gold Project in Nevada, which hosts a combined 2.2 million ounce gold equivalent resource, and maintains a sizeable lithium exploration portfolio in Québec’s James Bay region. These assets position the company well across precious and critical metals sectors.
While the foreign MRE at Shafter is yet to be converted to JORC standards, the ongoing validation drilling and polymetallic findings provide a compelling narrative for resource expansion and value enhancement. The company’s next tranche of assay results and metallurgical studies will be critical in shaping the project’s development trajectory.
Bottom Line?
Black Bear’s latest drilling not only confirms high-grade silver beyond current estimates but also reveals polymetallic potential that could reshape Shafter’s resource profile ahead of JORC conversion and mine restart plans.
Questions in the middle?
- Will the upcoming check analyses confirm historic silver grades are understated?
- How materially could polymetallic credits improve Shafter’s economic viability?
- What timeline can investors expect for the maiden JORC Mineral Resource Estimate release?