Orestone starts exploration at Francisca project

Executive Summary

• Orestone Mining Corp. has initiated Phase I exploration on its Francisca gold project in Salta Province, Argentina, focusing on detailed mapping and sampling of the South gold zone to prepare for Phase II drilling.
• The Phase I program involves a 200-by-500-metre grid covering the surface exposure of the South gold zone, including 600 rock chip, channel, and grab samples, as well as the resampling of 11 existing trenches.
• Phase II is planned to consist of 1,500 metres of reverse circulation (RC) drilling in 10 holes, designed to cross-cut the gold-silver mineralized zone and test a larger porphyry target at depth.

Key Details

• Phase I Exploration Scope:
  • Detailed mapping and sampling of a 200-by-500-metre grid.
  • Sampling includes 600 rock chip, channel, and grab samples.
  • Resampling of 11 existing trenches that cross-cut the South gold zone along its 500-metre strike length.
  • Data will be used to refine drill hole orientation for Phase II.
• Phase II Drilling Plan:
  • Planned volume: 1,500 metres of RC drilling.
  • Number of holes: 10 drill holes.
  • Spacing: 40 to 80 metres.
  • Objectives: Cross-cut the presently defined gold-silver mineralized zone and test the larger porphyry target at depth below the oxide horizon.
• Previous Sampling Results (2025):
  • Confirmation sampling of 20 rock chip samples completed.
  • Grade range: 0.03 to 33 grams per tonne (g/t) gold and 2.0 to 160 g/t silver.
  • Average grades: 5.78 g/t gold and 29.2 g/t silver (with cuts applied for averages: gold cut to 10 g/t, silver cut to 60 g/t).
  • High-grade samples: 11 samples assayed >6.0 g/t gold; 8 samples assayed between 0.36 and 4.5 g/t gold.
• Geological Context:
  • South gold zone outcrops over an area 50 to 100 metres wide with a strike length of 500 metres.
  • Oxide gold stock-work mineralized trend outlined over a northwest strike length of 1,100 metres.
  • South zone underlain by a 400-by-500-metre circular IP changeability anomaly, indicating potential for a larger mineralized intrusive body at depth.
  • Mineralization associated with quartz feldspar porphyry intrusive dykes and intense sericite alteration along northwest-trending faults.
• Property Terms and Location:
  • Orestone can earn up to an 85% interest in the Francisca property.
  • Earn-in requirements: Cash payments and exploration expenditures totaling $4.2 million (U.S.) over seven years.
  • Location: Salta Province, northwestern Argentina, approx. 80 km northwest of the city of Salta.
  • Elevation: 3,300 to 3,650 metres.
  • Infrastructure: Easily accessible via paved and gravel roads; exploration can be conducted year-round.

Notable Quotes

• David Hottman, CEO: "The Francisca property covers a robust gold system discovered during a period of historically very low gold prices, with no meaningful exploration being conducted during the last 20 years. We are excited to get the surface exploration under way in preparation for drilling to test this large gold target. Our goal is to define an oxide gold deposit that can be mined by open pit."