Stuhini identifies copper-gold target at Ruby Creek

Executive Summary

• Stuhini Exploration Ltd. has identified a new high-grade copper-gold porphyry target at its Ruby Creek project in British Columbia, expanding the project's multimetal potential beyond its flagship molybdenum deposit.
• The company is advancing a two-pronged strategy: developing the 433-million-pound Ruby Creek molybdenum deposit via a conceptual economic study with Tetra Tech, while simultaneously exploring new targets including the Silver Surprise zone and the newly identified Ruffner porphyry.
• Initial sampling of the new Ruffner target returned significant high-grade intercepts, with geological and magnetic data suggesting a large, buried porphyry system spanning approximately 1 km by 600 metres.

Key Details

• New Target Identification: A potential copper-gold porphyry target identified in the Ruffner area, located 3.6 km from the Ruby Creek molybdenum deposit.
• Sample Assays (Ruffner Target):
  • Eleven grab outcrop and talus samples returned >0.5% copper.
  • Highest copper assay: 8.1% Cu.
  • Highest gold assay: 36.8 g/t Au (from talus float).
  • Additional gold assay: 13.0 g/t Au (from outcrop).
• Geological & Geophysical Data:
  • Fieldwork uncovered a 400-metre-wide discontinuous exposure of feldspar-phyric porphyry.
  • Alteration signatures include phyllic (quartz-sericite-pyrite) and propylitic (chlorite-epidote-carbonate) zones consistent with copper porphyry systems.
  • Magnetic data suggests the mineralized porphyry may span approximately 1 km by 600 metres.
• Molybdenum Development (Ruby Creek Deposit):
  • Engaged Tetra Tech to complete a conceptual-level economic study.
  • Aims to assess the potential for an updated preliminary economic assessment (PEA).
  • Based on ~74,000 metres of historical drilling and a 2006 feasibility study.
  • Current resource: 433 million pounds of molybdenum (measured and indicated, pit-constrained) using $15/lb price and 0.02% cut-off grade.
• Silver Surprise Zone:
  • High-grade silver samples up to 16,030 g/t Ag confirmed at surface.
  • Mini-bulk sample completed; metallurgical results are pending.
• Project Scale: The Ruby Creek project spans 29,734 hectares (approx. 1,100 sq km) within the Surprise Lake batholith, hosting multiple styles of mineralization (porphyry-moly, skarn, epithermal, intrusion-related gold).
• QA/QC Protocols: Samples processed at Bureau Veritas (Whitehorse/Vancouver); analyzed via modified aqua regia/ICP-MS, with specific protocols for overlimit elements (fire assay for high Ag/Au, MA370 for overlimit base metals, etc.).

Notable Quotes

• "These are the kinds of early-stage results that can generate real excitement," said Meredith Eades, president and chief executive officer of Stuhini.
• "Our goal is to advance both development and discovery in parallel, positioning Stuhini as a compelling multimetal story with near-term catalysts and long-term growth potential."