First insights into fluid evolution in the Taca Taca Bajo porphyry copper system (NW Argentina). Geosciences for a sustainable future

VANINA LOPEZ DE AZAREVICH; FULIGNATI, P.; ANNA GIONCADA; AZAREVICH, MIGUEL; M. M. ORTEGA PÉREZ

Torino

Congreso; S14. Ore deposits for a green future; 2022

Università di Pisa

The Taca Taca Bajo ore deposit is a typical Andean porphyry copper-gold-molybdenumdeposit (2203 Mt with an average grade of 0.43% Cu, 0.012% Mo and 0.09 g/t Au measuredand indicated resource, First Quantum Minerals Technical Report 2021), sited in NWArgentina. The copper mineralization was first discovered on the Taca Taca property in themid-1960s. The porphyry deposit consists of 10 km2 of hydrothermally altered rocksshowing a central potassic-phyllic core to peripheral phyllic, argillic and propylitic alterationzones. The hypogene sulphide mineralization was dated to Oligocene and is associated withN-S oriented, rhyodacitic porphyry dykes and a small stock that intrudes the Silurian TacaTaca Granite. Supergene alteration is superimposed in the central part. Hematite-quartzcopper-gold veins occur to the NW and an exotic copper mineralization to the SE.