Mammoth Minerals has confirmed significant shallow gold mineralisation extending 700 metres along the Buster trend at its Excelsior Gold-Silver Project in Nevada, signalling potential for a larger Carlin-type gold system. Drilling has now shifted to the high-grade Blue Dick Silver Prospect with results expected soon.
- Shallow gold mineralisation extended 700m at Lunchbox Ridge
- Multiple broad gold intercepts confirm growth beyond Buster Mine Zone
- Drilling shifted to Blue Dick Silver Prospect with assays pending
- 24 additional RC drill holes planned over >6.5km strike
- Results support geological model of multiple feeder structures
Significant Gold Mineralisation Extends Buster Trend
Mammoth Minerals (ASX:M79) has reported encouraging results from its ongoing reverse circulation (RC) drilling program at the Excelsior Gold-Silver Project in Nevada, USA. New assays from the Lunchbox Ridge Prospect, located about 700 metres along strike from the historical Buster Gold Mine zone, reveal multiple broad, shallow gold intercepts that extend the known mineralisation footprint well beyond the previously drilled area.
Key intercepts include 22.9 metres at 1.37 grams per tonne (g/t) gold from 10.7 metres, including a higher-grade 3 metres at 4.15 g/t from 22.9 metres, and 12.2 metres at 1.57 g/t from 32 metres, including 4.6 metres at 3.31 g/t from 38.1 metres. These results confirm the presence of a shallow-dipping mineralised horizon over 10 metres thick with higher-grade zones that may represent feeder pathways for gold mineralisation.
Geological Model Supports Multiple Feeder Structures
The drilling results align with Mammoth's geological interpretation of a Carlin-type gold deposit system, where gold is hosted in highly altered limestone and stratigraphically controlled lithologies. The mineralisation appears to be structurally controlled by multiple fault and breccia zones acting as fluid conduits for mineral-rich hydrothermal fluids.
Managing Director Glenn Poole highlighted that the mineralised system remains open both along strike and down-dip, presenting a compelling opportunity to expand the scale of gold mineralisation outside the historically drilled Buster Mine Zone. This could rapidly add ounces in previously underexplored areas.
Drilling Advances at Blue Dick Silver Prospect
Following the Buster trend drilling, Mammoth has shifted focus to the Blue Dick Silver Prospect, targeting high-grade, silver-dominant polymetallic mineralisation. Five RC holes totaling 1,100 metres have been completed, with assay samples submitted and results expected within three weeks. This prospect covers a strike length exceeding 6.5 kilometres, with 24 additional drill holes planned to test multiple mineralised trends.
Surface sampling at Blue Dick has previously returned extraordinary silver grades, including rock chip results up to 17,582 grams per tonne silver and gold grades exceeding 7 grams per tonne, underscoring the prospect's potential to deliver significant silver and critical minerals in a top-ranked mining jurisdiction.
Strategic Positioning and Next Steps
Mammoth holds an option to earn up to 80% ownership of the Excelsior project, which spans 135 square kilometres across multiple claim blocks in the Walker Lane trend, a prolific gold-silver mining corridor. The company is actively advancing a robust pipeline of drill-ready targets across the project, including the recently acquired Imperial Gold Project and other high-potential prospects.
The current drilling campaign is designed to test geophysical and geochemical targets identified last year, with a focus on expanding mineralisation along structural feeder zones. With assays pending from Blue Dick and ongoing drilling planned, Mammoth is positioning itself for a potential resource upgrade later this year.
Bottom Line?
Mammoth Minerals’ latest drilling confirms the Buster gold system’s potential to grow significantly along strike and at shallow depths, while upcoming Blue Dick assay results could unlock a new silver-dominant polymetallic chapter at Excelsior.
Questions in the middle?
- Will upcoming Blue Dick assay results confirm the high-grade silver potential indicated by surface samples?
- How will further drilling refine the geometry and true widths of the extended Buster mineralisation?
- What impact could these exploration results have on Mammoth’s planned maiden resource estimate later this year?