SciELO - Scientific Electronic Library Online

vol.57 número3Estilos eruptivos del complejo volcánico dómico Pan de Azúcar - Puna NortePetrología de la secuencia volcánica cenozoica en el área del arroyo Ranquil Huao: Meseta de Somún Curá. Patagonia Extraandina índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO


Revista de la Asociación Geológica Argentina

versión On-line ISSN 1851-8249


LEAL, P.R.. Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province. Rev. Asoc. Geol. Argent. [online]. 2002, vol.57, n.3, pp.251-259. ISSN 1851-8249.

In this paper the non-ore minerals of the southern sector of this deposit are studied. Microthermometric analysis on calcite, barite and fluorite show fluid salinities of 2.7 and 4% wt eq. NaCl, and temperatures below 100°C. Isotopes of 13C, 18O and 34S allow to determine a meteoric source for the fluids associated to their precipitation. The d13C values obtained in calcite are considered the result of a fluid in equilibrium with atmospheric CO2 plus the addition of carbon due to dissolution of organic compounds. On the other hand, the d34S values of barites can be explained by another fluid with H2S contents resulting from the dissolution of sulfides from the wall-rock. Finally, the presence of two different fluids is postulated here. An upward fluid was responsible for the barite precipitation where the H2S was oxidized to SO4=. This fluid could form fluorite and silica varieties as its temperature decreases. The existence of a downward fluid explains calcite generation as the descending fluid is heated.

Palabras clave : Fluid inclusion; Stable Isotopes; Manganese; Sierras Pampeanas.

        · resumen en Español     · texto en Español     · Español ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons