Key Highlights

  • Surface rock chips at Ruby Lake returned up to 43 g/t silver and 2.8% lead.
  • Silver and base metal geochemical anomalism extends over a 2.7km trend, open along strike.
  • Rock chips at Cherry Springs returned up to 1.4% lead, 2.0% zinc and 0.2% copper.
  • Drillhole planning is under way to test intrusion-related mineralisation at Ruby Lake and Cherry Springs.

Bison Resources Limited (ASX:BSR) has provided an update on field exploration across its portfolio of four projects in Elko County, north-east Nevada. The announcement dated 11 November 2026 reports silver, copper, lead and zinc mineralisation from surface rock chip sampling at Ruby Lake and Cherry Springs, both within the Carlin Trend.

The Ruby Lake rock chip results

Surface rock chip sampling at Ruby Lake returned up to 43 g/t silver and 2.8% lead. The company has defined a 2.7km trend of silver and base metal surface geochemical anomalism, which remains open along strike. The anomalism is coincident with pronounced alteration on the southern Margin of the Ruby Stock intrusion.

Bison said the anomalism over more than 2km of strike has validated its targeting strategy in areas it describes as previously unexplored. Full assay tables are in an appendix to the announcement.

Cherry Springs and the Nevada portfolio

At Cherry Springs, rock chips returned up to 1.4% lead, 2.0% zinc and 0.2% copper, coincident with magnetic anomalies on the margin of the Cherry Stock intrusion.

The four Nevada projects, Ruby Lake, Cherry Springs, Bald Peaks and Medicine Range, comprise 456 unpatented lode claims covering about 38.1km², around 80km south-east of Elko. The company is targeting carbonate-hosted precious and base metal deposits in the Carlin Trend.

Next steps and what rock chips can show

Geophysical interpretation and assays are near completion, and the company plans to integrate the datasets and rank targets for maiden drilling. The company’s CEO described the results as useful, but they remain surface samples.

Rock chip grades are selective and do not indicate the grade or thickness of any mineralisation at depth. Drilling will be needed to establish whether the intrusion-related systems carry economic metal.

Final Word

Bison’s rock chip program has identified two intrusion-related targets and a trend of anomalism at Ruby Lake that the company will rank for drilling. The integration of geophysics and assays will determine which targets advance to maiden drilling.