Role of massive anhydrite bodies in the Cordilleran-type polymetallic mineralization of Morococha district, Peru: 3D geological modeling and Sr-S-O isotope constraints

Silvana Stipetich, Jean Vallance, Lisard Torró, Silvia Rosas, Diego Benites, Pablo Valverde

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva


In the Morococha district, anhydrite bodies hosted by carbonate rocks at the base of the Late Triassic Chambará Formation, Pucará Group, close to its unconformable contact with clastic and volcanic rocks of the underlying Triassic Mitu Group, show evidence of deformation and ascent during the Andean Orogeny. These bodies are often spatially associated with Cordilleran-type polymetallic replacement orebodies. We propose that impermeable anhydrite bodies acted as stratigraphic seals promoting carbonate replacement by the Miocene mineralizing fluids. Field evidence and the Sr-SO isotope composition of the anhydrite bodies suggest that they are Norian marine evaporites that partly have interacted with Miocene hydrothermal fluids.
Idioma originalEspañol
Título de la publicación alojadaProceedings of the 16th SGA Biennial Meeting
Número de páginas4
EstadoPublicada - 1 ene. 2022

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