Desarrollo de un protocolo integrado de Control de calidad (QAQC) para la estimación de recursos inferidos en depósitos tipo pórfido (Cu-Au), mediante modelamiento geológico 3D.

Abstract

Abstract: Traceability and reproducibility of quality assurance and quality control (QA/QC) condition the estimation of Inferred Resources in Cu-Au porphyries. To this end, an integrated eleven-stage protocol was developed under JORC and CIM standards and NI 43-101. This procedure validated the deposit's relational GeoDataBase (22 drillholes and 8,129 assays) at three levels: formal integrity, geological consistency and three-dimensional (3D) verification. Subsequently, exploratory analysis confirmed a log-normal copper (Cu) distribution, significant grade differences among the seven lithological domains and a positive Cu-Au correlation. On that basis, 361 intervals were composited, the copper equivalent (CuEqR) was calculated and three wireframes were built in Micromine Origin & Beyond. The integration of lithology, veins and Cu grade identified quartz-chalcopyrite veins as the primary vector and delineated three nested ore shells: OS1 (302.88 Mt @ 0.221%), OS2 (192.34 Mt @ 0.267%) and OS3 (71.81 Mt @ 0.355% Cu). The protocol proved reproducible, traceable and transferable, and its iterative application supports continued drilling to the southeast and the increase of Inferred Resources.