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Tintina Mines Completes Drilling Campaign and Reports Key Geometallurgical Advances to Support 2025 PEA for Domeyko Sulfuros Project
TORONTO, Aug. 18, 2025 (GLOBE NEWSWIRE) -- Tintina Mines Limited ("Tintina" or the "Company") (TS...
About this update from Tintina Mines Limited
[{"type":"text","content":"Tintina Mines Completes Drilling Campaign and Reports Key Geometallurgical Advances to Support 2025 PEA for Domeyko Sulfuros Project\n\n\n\n TORONTO, Aug. 18, 2025 (GLOBE NEWSWIRE) -- Tintina Mines Limited (\"Tintina\" or the \"Company\") (TSXV: TTS) is pleased to announce the completion of its 2025 drilling campaign at the Domeyko Sulfuros Project, located in the Atacama Region, Chile. The primary objective of the campaign was to upgrade the Inferred Resources reported in January 2025 NI 43-101, and to support the development of a Preliminary Economic Assessment (PEA) in accordance with NI 43-101 standards, reinforcing the Company's commitment to the technical and strategic development of this asset.\n \n\n Preliminary drill results confirm the resource and demonstrate the potential to expand the deposit both to the northwest and at depth. Geometallurgical tests conducted during this phase indicate good copper liberation, low pyrite association, and favorable metallurgical recoveries, validating the technical potential of the ore under operating conditions.\n \n\n\n Drilling Campaign\n \n\n\n The 2025 Domeyko Sulfuros drilling campaign included 12 diamond drill holes, totaling 5,810 meters (Figure 1). This campaign provided key information for updating the 3D geological models, as well as collecting geotechnical data and core samples for geomechanical testing.\n \n\n The updated resource estimate is expected in September, while complete Cu-Au assay results will be available by the end of August. Currently, 20% of the geochemical results have been received. Some of the main intercepts in quartz-diorite porphyry are shown in Table 1.\n \n\n\n\n\n Table 1. Partial intercept results from the 2025 drilling program.\n \n\n\n\n\n\n\n Figure 1. Location map of the Domeyko Sulfuros Project and drill hole locations executed in 2025.\n \n\n\n\n\n Geometallurgical Test Results\n \n\n\n Mineralogical results confirmed that chalcopyrite (Cpy) is the primary copper-bearing mineral, with high liberation and low association with pyrite (Py), while gold occurs mainly as native gold and electrum, with fine particles (<20 µm) associated with sulfides.\n \n\n Comminution tests indicated low ore abrasiveness (low Ai), medium to hard hardness in primary grinding (SMC, SPI), and soft to medium hardness in secondary grinding (BWi), supporting t...