This study was economically supported by the Peruvian CONCYTEC-FONDECYT-World Bank project 107-2018-FONDECYT-BM-IADT-AV, the FONCAI-0023-2019 project granted by the Pontificia Universidad Católica del Perú (PUCP) and a Huiracocha Ph. D grant to D.B. granted by the PUCP. Pan American Silver Corp. provided field and logistical support and access to the mine area. Pan American Silver Corp. Morococha staff is most gratefully acknowledged, particularly Julio Zárate and Rubén Diaz. We appreciate the technical support by Xavier Llovet (CCiT-UB) during the acquisition of EPMA data, and by Peter Tollan (ETHZ) during the acquisition of LA-ICP-MS data. We are grateful to Fredrik Sahlström, Max Frenzel, and Editor-in-Chief Franco Pirajno for their constructive comments which significantly improved the manuscript.

This study was economically supported by the Peruvian CONCYTEC-FONDECYT-World Bank project 107-2018-FONDECYT-BM-IADT-AV and the Mexican research program CONACYT-Ciencia Básica (A1-S-14574). We thank the staff of Tinka Resources Ltd., particularly to Jorge Gamarra, for help and hospitality during the sampling program. We appreciate the technical support by Xavier Llovet (CCiT-UB) and Carlos Ortega Obregón (LEI-UNAM) during acquisition of EPMA data, and by Pete Tollan (ETH) during acquisition of LA-ICP-MS data. We are grateful to Richard Sillitoe, Andreas Dietrich, Graham Carman (president and CEO of Tinka Resources), and Editor-in-Chief Bernd Lehmann for their constructive comments which significantly improved the manuscript. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.