Arizona Sonoran talks FS drilling at Parks/Salyer

Executive Summary

• Arizona Sonoran Copper Company has advanced its feasibility study (FS) infill drilling program at the Cactus project, updating its internal mineral resource model to define a "measured" zone within the Parks/Salyer starter pit.
• The updated model targets proven mineral reserves for the first 2–2.5 years of production, with initial assay results and modelling consistent with existing resource and reserve estimates.
• Approximately 70% of the FS drill program is complete, with the company shifting focus to condemnation drilling (planned for Q1 2026) and initiating geotechnical/hydrogeological drilling for the pending feasibility study.

Key Details

• Drilling Program Scope: ~92,000 ft (28,000 m) over the southern Parks/Salyer starter pit zone at 125 ft (38 m) spacing.
• Completion Status: ~70% of the FS drill program completed; ~62% of drill assays received. Focus now on condemnation drilling.
• Resource/Reserve Target: Model aims to define proven mineral reserves within the prefeasibility study starter pit (covering the first 2–2.5 years of copper cathode production).
• Grade Profile: Starter pit grades expected at ~0.3% CuT initially, increasing to 0.51% CuT in year 3, and peaking at 1.03% CuT in year 12 in deeper, higher-grade zones.
• Parks/Salyer Starter-Pit Drill Highlights:
• ECM-480: 0.55% CuT over 483 ft (147 m) from 231 ft (70 m) depth (enriched)
• ECM-477: 1.72% CuT over 93 ft (28 m) from 267 ft (109 m) depth (enriched)
• ECM-413: 0.49% CuT over 269 ft (82 m) from 810 ft (247 m) depth (enriched)
• ECM-416: 0.77% CuT over 185 ft (56 m) from 628 ft (191 m) depth (enriched)
• ECM-424: 0.33% CuT over 406 ft (124 m) from 559 ft (171 m) depth (enriched)
• QA/QC Protocol: Supervised by on-site Cactus project personnel; core samples sealed on-site and shipped to Skyline Laboratories (Tucson, AZ) for analysis; lab complies with ISO9001:2008 standards.
• Technical Verification: Reviewed and verified by Allan Schappert (CPG No. 11758), an independent qualified person per NI 43-101.
• Next Steps: Following FS drill program completion and updated resource modelling, the geology team will transition to operational readiness preparations later this year.

Notable Quotes

• George Ogilvie, President & CEO: "The initial update to our internal model is demonstrating a high mineral resource conversion rate at the Cactus project with the tighter space drilling, providing a basis for the targeted declaration of proven mineral reserves within the Parks/Salyer starter pit to be defined in the upcoming feasibility study. As a result, we anticipate a further derisking of the project for potential project financiers in our continuing debt project financing process."