Edad y origen de la fluorita del yacimiento de La Nueva (Cabalango, Córdoba, Argentina) en base a geoquímica de isótopos radiogénicos (Nd y Sr)

GALINDO, C.; BALDO, E.G; PANKHURST, R.J; CASQUET, C.; RAPELA, C.W.; SAAVEDRA, J.

GEOGACETA

Sociedad Geológica de España

Lugar: Madrid; Año: 1996 vol. 19 p. 67 - 69

0213-683X

The fluorite mineralization  from the La Nueva Mine, has a Sm-Nd age of 130 +- 19 Ma, and thus must be related to the Lower Cretaceous late Gondwanic extensional and magmatic event that affected the Sierras Pampeanas Basement of Argentina. Hydrothermal fluids involved in the formation of the fluorite were probably derived by mixing of two fluids, an ascending high87Sr/86Sr one, probably equilibrated with basement metamorphics, as suggested by very negative EpNd(130) values, an a second, descending with a low 87Sr/86Sr.