Coeur Provides Palmarejo Exploration Update

Coeur Mining, Inc. (“Coeur” or the “Company”) (NYSE: CDE) today provided an update on the exploration programs at its Palmarejo gold-silver complex located in southwest Chihuahua, Mexico.

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Figure 1: Highlighted drillhole results from the Hidalgo deposit (Photo: Business Wire)

Drill results from the Hidalgo deposit – discovered in 2019 and representing the northwest extension of the Independencia deposit – have contained the highest gold grades ever encountered at Palmarejo and have defined two new mineralized structures. Hidalgo has rapidly grown to become Palmarejo’s second largest source of mineral reserves after the Guadalupe deposit, where mining has taken place since 2014. In addition, mapping and sampling of East Palmarejo has defined numerous mineralized trends and high-priority targets set to be drilled beginning in 2024. Geological observations and sampling results to date indicate high potential for new discoveries in this prospective area.

Key Drill Highlights^1,2

• Hidalgo Drilling Leads to New Discoveries and Record High Gold Grades – Drilling at Hidalgo confirms the highest gold grades ever intersected at Palmarejo and continues to extend high-grade mineralization along strike to the northwest in the direction of the Palmarejo processing facility. Hidalgo now comprises three individual veins: Hidalgo and two discoveries made earlier this year – San Juan and Libertad – which over the last fifteen months have collectively extended mineralization by 800 meters along strike. All veins remain open along strike and down dip. Notable results from expansion and infill drilling include the following true width intercepts:
  • Hole HGDH_118 (Hidalgo) returned 49.5 feet at 0.08 ounces per ton (“oz/t”) gold and 7.7 oz/t silver (15.1 meters at 2.8 g/t Au and 265.1 g/t silver)
  • Hole HGDH_127 (Hidalgo) returned 34.8 feet at 0.10 oz/t gold and 7.3 oz/t silver (10.6 meters at 3.4 g/t gold and 248.5 g/t silver)
  • Hole HGDH_137 (Hidalgo) returned 19.0 feet at 1.20 oz/t gold and 14.5 oz/t silver (5.8 meters at 41.1 g/t gold and 496.2 g/t silver)
  • Hole HGDH_145 (San Juan) returned 18.4 feet at 0.09 oz/t gold and 7.0 oz/t silver (5.6 meters at 3.1 g/t gold and 239.8 g/t silver)
  • Hole HGDH_149 (Libertad) returned 24.6 feet at 0.09 oz/t gold and 5.0 oz/t silver (7.5 meters at 3.0 g/t gold and 170.2 g/t silver)
  • Hole HGDH_151 (Hidalgo) returned 28.5 feet at 0.09 oz/t gold and 4.1 oz/t silver (8.7 meters at 3.0 g/t gold and 141.8 g/t silver)