Marimaca Drills Pampa Medina Sulphides – Intersects Exceptional 6m of 12.0% Cu within 26m of 4.1% Cu in dominantly Bornite in SMRD-13, 40m of 2.1% Cu in SMD-02

VANCOUVER, British Columbia, July 03, 2025 (GLOBE NEWSWIRE) -- Marimaca Copper Corp. (“Marimaca Copper” or the “Company”) (TSX:MARI, ASX:MC2) is pleased to announce significant, high grade, sediment-hosted copper sulphide and oxide intersections which materially extend the Pampa Medina deposit in all directions. Pampa Medina is located at low altitude approximately 28km east of the Company’s Marimaca Oxide Deposit (“MOD”) in a flat “pampa” valley within the Atacama Desert (Figure 1). Drilling targeted extensions of the shallow oxide-chalcocite mineralization at Pampa Medina and intersected ultra high-grade, bornite-chalcopyrite, disseminated chalcopyrite and high-grade oxide mineralization, which is hosted in a regionally extensive system of interbedded sedimentary rocks hosting the Pampa Medina deposit.