Galindo Francisco, María Del CarmenPankhurst, R.J.Casquet Martín, CésarConiglio, JorgeBaldo, Edgardo G.Rapela, Carlos W.Saavedra, Julio2023-06-202023-06-2019970020-6814https://hdl.handle.net/20.500.14352/56993Fluorite mineralization at the La Nueva and Bubu mines yields Sm-Nd ages of 131 ± 22 and 117 ± 26 Ma, respectively. Thus, the mineralization most probably is related to a late Gondwanian (Lower Cretaceous) extensional and magmatic event that affected the Sierras Pampeanas basement during the opening of the Atlantic Ocean. Hydrothermal fluids involved in the formation of the fluorite probably were of meteoric origin, their isotopic composition (Sr and Nd) resulting largely from the incongruent dissolution of feldspars in the host porphyritic granites.engjournal articlehttp://www.tandf.co.uk/journals/TIGRopen access550.4(82)Fluorite mineralizationSierra PampeanaArgentinaGeoquímica2503 Geoquímica