MINERÍA la mejor puerta de acceso al sector minero EDICIÓN 572 / MAYO 2025 49 For: Raul Montesinos, Zhaoshan Chang and Shiqiang Huang, Colorado School of Mines; Juan Carlos Castelli, Mappex Consulting; Willis Hames, Auburn University, and Robert A. Creaser, University of Alberta. Trabajo ganador en la categoría posgrado del II Concurso Internacional de Estudiantes SEG-SGA-IIMP. Abstract This study seeks to enrich our understanding of high-sulfidation (HS) ore-forming processes in siliciclastic environments and guide exploration in siliciclastic terranes by studying the La Virgen district in northern Peru, 17 km east of the giant Lagunas Norte HS deposit, in which the HS mineralization is mostly hosted in the sandstone of the Chimu Formation and other siliciclastic rocks. In addition, this is the first detailed study of La Virgen District and has led to the discovery of porphyry style mineralization in the eastern part of the area, which, based on mapping, geochronology, SWIR (Short Wavelength Infra-Red) spectral analysis, petrography, LA-ICP-MS and whole rock geochemistry, is shown to have significantly older mineralization than the western side. Introduction Most of the major HS epithermal deposits around the world are hosted in magmatic rocks, including Yanacocha (Peru) with >70 million ounces (Moz) Au hosted in dacite porphyry domes and ignimbrites (Longo et al., 2010; Pilco and McCann, 2021); Pascua Lama (Chile- Argentina) with >21 Moz Au hosted in Permian-Triassic granite (Chouinard et al., 2005); Pueblo Viejo (Dominican Republic) with >41.7 Moz Au hosted in mudstone, microdioritic intrusion, and basaltic volcanic rocks (Kesler et al., 2005; Vaughan et al., 2021); Lepanto (Philippines), hosted in dacitic pyroclastic rocks (Chang et al., 2011; Calder et al., 2022); Mt Carlton (Australia), hosted in rhyodacite (Sahlstorm et al., 2020), and Zijinshan (China), hosted in granite (Chen et al., 2019). However, the giant Lagunas
RkJQdWJsaXNoZXIy MTM0Mzk2