Unveiling High-Tech Metals in Roasted Pyrite Wastes from the Iberian Pyrite Belt, SW Spain Yesares, Lola González Jiménez, José María González Pérez, Igor Sánchez Almazo, Isabel María Mine waste Roasted pyrite Iberian Pyrite Belt High-tech metals Untapped resources Circular economy Mineralogical waste characterization This research was fully funded by the MECRAS Project A-RNM-356-UGR20 “Proyectos de I+D+i en el marco del Programa Operativo FEDER Andalucía 2014–2020” of the Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía (Spain). Supplementary Materials: The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/su151512081/s1 The Iberian Pyrite Belt (IPB), in the southwestern Iberian Peninsula, is a large metallogenic province exploited since ancient times. As a result of historical and current mining activity, a vast volume of metallic mineral waste, mainly derived from the processing of pyrite, is still in situ and polluting the environment. A specific mine waste residuum locally known in the area as "morrongos", which was produced during pyrite roasting mainly in the 19th century, is evaluated here in order to unravel untapped resources of high-tech metals commonly used in high-tech devices. Applying a combination of whole-rock geochemical (ICP-AES, ICPMS, FA-AAS) and single-grain mineralogical techniques (EPMA, LA-ICP-MS, FESEM, and FIB-HRTEM) on the "morrongos", we unhide the still-present remarkable concentrations of Au, Ag, Pb, Zn, and Cu in them. The mineralogical expressions for these economic metals include oxides (hematite, magnetite, and hercynite), arsenates, sulfates of the jarosite group, native metals, and, to a lesser extent, relictic sulfides. This first-ever estimation of these economic metals in this type of residue allows their revalorization, highlighting them as suitable sources for the exploitation and recovery of metals necessary for the clean energy transition. 2023-09-28T08:16:20Z 2023-09-28T08:16:20Z 2023-08-07 journal article Yesares, L.; González-Jiménez, J.M.; Jiménez-Cantizano, F.A.; González-Pérez, I.; Caro-Moreno, D.; Sánchez, I.M. Unveiling High-Tech Metals in Roasted Pyrite Wastes from the Iberian Pyrite Belt, SW Spain. Sustainability 2023, 15, 12081. [https://doi.org/10.3390/su151512081] https://hdl.handle.net/10481/84708 10.3390/su151512081 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI