The Portovelo-Zaruma mining camp is an unusual mining district in Ecuador, with historic gold production exceeding 4.5 Moz. The production has mostly come from an extensive set of base metal-rich veins that lie adjacent to a cluster of porphyry intrusions, and around which alteration and vein mineralogy are zoned. The vein trend strikes north-northwest over a distance of 15 km and consists of over 90 km of veins. Exploration of the camp has led to reassessment of the controls on the mineralization, which has highlighted the interaction of host rocks, structure, and zoning around the porphyry cluster.
Mining operations commenced...
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