Mineral Mountain
Introduction
Mineral Mountain is a Laramide age, porphyry copper project located in the Mineral Mountain Mining District, 16 miles east of Florence, Arizona. A maiden drilling program completed across the large porphyry copper footprint identified in 2024 has confirmed a large Laramide age porphyry copper system. Arizona is a Tier 1 mining friendly, politically secure jurisdiction with excellent and readily accessible infrastructure.
The project is located in the Laramide age copper province in Arizona situated in a major northeast trending, porphyry copper belt that hosts some of the largest porphyry copper deposits in Arizona including Santa Cruz and Resolution. The project is located approximately 25 kilometers (km) (15 miles) southwest from Rio Tinto and BHP’s giant Resolution porphyry copper-molybdenum deposit and approximately 25km northeast of Taseko’s Florence Copper project.
2026 Drilling Update: Porphyry Copper Discovery
The maiden two-hole drill program (2558.11m) tested the large surface porphyry footprint and underlying positive chargeability anomaly confirming a large Laramide Age porphyry copper system.
DDH MM-01-2025 (860.76m) intersected eight intervals of copper-molybdenum enrichment in the outer portion of the porphyry system.
DDH MM-02-2025 (1697.35m) located approximately 1.2km northeast of DDH MM-01-2025 intersected at depth, multiple porphyry features typically observed in porphyry copper systems including consistent, significantly higher copper-molybdenum concentrations associated with strong to intense phyllic (quartz-sericite-pyrite) altered Pinal Schist and instances of bornite riming chalcopyrite towards the bottom of the hole.
Property Description
Copper Fox, through its subsidiary Desert Fox Mineral Mountain Co., owns 100% interest in the Mineral Mountain project. The Project consists of two Arizona Mineral Exploration Permits and 260 BLM mining claims covering approximately 2,633.8 ha (6,508.2 acres). The project is not subject to third party encumbrances.
Geological Model
The porphyry copper deposits in the Safford Mining District of Arizona are used as geological/ exploration models for the project. The large copper footprint at Mineral Mountain is interpreted to represent the oxidized surface expression of a buried, gold enriched, porphyry copper-molybdenum system. The level of exposure at Mineral Mountain represents the interface between the Sericite-Chlorite and Potassic alteration zones of the interpreted buried porphyry copper system. Recent exploration identified a new area of porphyry style mineralization and alteration 1.5km southeast of the targets designated for drilling in October 2025. This target is currently being assessed.
Porphyry Footprint
The porphyry footprint is an open-ended northeast trending zone of coincident porphyry style mineralization and alteration underlain by a strong positive chargeability anomaly (>9mv/v/18mrad) measuring approximately 3,200m long by 1,200m wide hosted in phyllic (sericite-chorite) and potassic altered Laramide age porphyritic biotite granodiorite and quartz monzonite. The open-ended, chargeability/resistivity anomaly extends below the depth of penetration of the geophysical survey. The mineralization is characterized by a copper-magnetite (now hematite) association with enhanced gold-molybdenum concentrations. The porphyry footprint hosts over 800 occurrences of secondary and primary copper mineralization (chrysocolla, malachite, chalcocite +/- covellite +/- chalcopyrite). Modeling of multi-element geochemical data defined an area within the footprint measuring approximately 3,000m by 700m of greater than 1,000 parts per million (ppm) copper within which occurs two zones (1,500m by 750m and 750m by 500m) of greater than 30ppm molybdenum.
Next Steps
The porphyry features identified in DDH MM-02-2025 support the interpretation that the hotter part (the potassic core) of the porphyry system is located at depth. To gain a better understanding of the system prior to planning the next drilling program, additional core sampling followed by a review of all geological, structural, geochemical, geophysical and alteration data incorporating several geochemical vectoring techniques using the geochemical data (ICP-MS with 4-acid digestion) are planned.
The objective of the vectoring is to map the trace element; mineral and alteration changes/patterns associated with the transition from high to lower temperatures within a porphyry system. High-temperature metals such as bismuth and molybdenum (Bi-Mo) indicate the core of the system whereas lower-temperature base metals such as antimony and arsenic (Sb-As) occur in the lower temperature margins of the system.
Similarly major oxide data (Al, Na, K, Ca) can be used to map areas of lower temperature phyllic/argillic alteration and high-temperature potassium flooding in the Potassic zone.