Pampa Medina Drilling Continues to Validate Sedimentary-Hosted Copper Manto Model

About this update from Marimaca Copper Corp.

[{"type":"text","content":"Pampa Medina Drilling Continues to Validate Sedimentary-Hosted Copper Manto Model\n\n\n\n VANCOUVER, British Columbia, Nov. 11, 2025 (GLOBE NEWSWIRE) --\n \n Marimaca Copper Corp. (“Marimaca Copper” or the “Company”) (TSX:MARI, ASX:MC2)\n \n is pleased to announce the final results from it’s 10,000m discovery drilling campaign at the Pampa Medina deposit, located at low altitude approximately 28km east of the Company’s Marimaca Oxide Deposit (“\n \n MOD\n \n ”) in a flat “pampa” valley within the Atacama Desert (Figure 1). The drilling results continue to demonstrate material extensions to the high-grade sedimentary-hosted sulphide copper horizon, as well as upside to the known extent of the near-surface oxide mineralization. The Company has subsequently commenced a 30,000m follow-up Phase II drilling program with five drilling rigs currently on site.\n \n\n\n Highlights\n \n\n\n\n\n Central Pampa Medina drilling continues to improve confidence in high grade oxides and sulphides\n \n\n\n\n SMRD-22 intersected 48m of 2.05% Cu from 186m, within 160m of 0.92% Cu from 102m (oxides)\n \n\n\n\n\n\n Southern Pampa Medina drilling confirms primary mineralized sedimentary horizon extends 900m south of previous drilling\n \n\n\n\n SMR-19 intersected 16m of 2.29% Cu from 464m within 28m of 1.44% Cu from 464m (sulphides)\n \n\n\n\n SMR-07 intersected 6m of 3.17% Cu from 334m within 14m of 1.69% Cu from 330m (sulphides)\n \n\n\n\n\n\n North and north-west step-outs continue to demonstrate continuity of mineralization in the favourable sedimentary horizon\n \n\n\n\n SMRD-20 intersected 38m of 1.48% Cu from 540m (sulphides) within 90m of 0.96% Cu from 488m, both within a broader intersection of 198m of 0.65% Cu (mixed oxides/sulphides)\n \n\n\n\n SMRD-17 and SMRD-18 intersected subparallel post-mineral WNW-trending faulting and dykes across favourable horizons\n \n\n\n\n SMRD-17 intersections, impacted by late faulting, include 10m at 1.34% Cu from 590m (sulphides) and 18m at 0.73% Cu from 206m (oxides)\n \n\n\n\n SMRD-18 intersections, impacted by late faulting, include 6m at 1.56% Cu from 392m (mixed\n \n\n ) and 40m at 0.40% Cu from 40m (oxides)\n \n\n\n\n\n\n\n\n Reverse-circulation scout drilling (“RC drilling”), testing for shallow oxides to the south and...

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