Significant Infill Intercepts
0.50% Cu over 502 m, including 0.87% Cu over 172 m (AZ22181)
1.00% Cu over 282 m, including 1.40% Cu over 172 m (AZ22186)
0.66% Cu over 500 m, including 0.92% Cu over 276 m (AZ22184A)

TORONTO, April 05, 2023 (GLOBE NEWSWIRE) -- McEwen Copper Inc., 52%-owned by McEwen Mining Inc. (NYSE: MUX) (TSX: MUX), is pleased to report the latest assay results from Los Azules, where an ongoing drilling program continues to deliver consistent infill results. Located in San Juan, Argentina, the Los Azules Project has many features comparable to world-class copper-gold deposits in South America, including a thick blanket of higher-grade Enriched (or Supergene) mineralization.

Highlights

Hole AZ22183 returned an Enriched zone intercept of 0.87% Cu over 152 m (est. true thickness) which expands mineralization from adjacent high-grade results drilled in prior programs (Figure 1 and 2).
In hole AZ22184A, an Enriched zone interval grading 0.92% Cu over 276 m (est. true thickness) occurs in a hydrothermal magmatic breccia within the core of the deposit (Figure 3). This breccia unit acts as a conduit for mineralizing fluids, sometimes forming higher grades within the broader porphyry mineralization at Los Azules.
Hole AZ22181 returned an Enriched zone intercept of 0.87% Cu over 172 m (est. true thickness) and fills a gap between high-grade holes drilled earlier in 2022 (Figure 4).
Hole AZ22186 includes an interval grading 1.00% Cu over 282 m (true thickness of 247 m) in the Enriched zone nearby a historic high-grade- intercept (Figure 5).
“We have four different drilling contractors with 13 drills turning,” commented Michael Meding, Vice President and General Manager of McEwen Copper. “This initiative also involves training and optimizing the entire value chain, with the significant engagement of local suppliers and services.”

After resuming the exploration program in October 2022, drilling has now reached the 25,000 meters initially planned and will continue until the end of the field season. Key objectives of the program include:

Increasing drilling density to upgrade the classification of shallower copper resources to measured and indicated categories.
Providing metallurgical, hydrological and geotechnical data for the feasibility study mine design to be completed in late 2024.
Testing for extensions of Los Azules mineralization to the north, south and at depth.
Table 1 presents the summary of copper (Cu), gold (Au) and silver (Ag) assay results from nineteen recently completed exploration or geotechnical holes totaling some 8,000 meters of core.

Table 1 – Los Azules drilling results, February - March 2023
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