Estudio de inclusiones fluidas en la mineralización de Ag de La Bodera (Sistema Central Español)
- Josefina Sierra López
- Elena Vindel Catena
- Rosario Lunar Hernández
- José Ángel López García
- Jesús Martínez Frías
ISSN: 0210-6558
Year of publication: 1988
Volume: 11
Issue: 1
Pages: 61-66
Type: Article
More publications in: Boletín de la Sociedad Española de Mineralogía
Abstract
The silver bearing ore of La Bodera, represent the easternmost of an argentiferous SW-NE belt which extend from Bustarviejo to Hiendela-encina and La Bodera. The mineralization is vein type striking NWSE and E-W. The mineral association is made up by sphalerite, galena, chalcopyrite and silver minerals, such as freibergite, pyrargyrite, polybasite, freislebenite, in barite, quartz, fluorite and siderite gangue. Fluid inclusions studies have been made on fluorite and quartz of second generation. The obtained results indicate that fluid phases are of late character and constituted by complex aqueous fluids, and probably containing cations such as Ca2+ and Mg2+- Salinity values in fluorite, vary between 3- 24% eq. NaCl, while homogenization temperature ranges from 100-140°C. Salinities in quartz fluids inclusions are always higher (18- 27% eq. NaCl) and homogenization temperatures lower (90-120°C) when compared to fluorite values Finally, an epithermal character of the solutions and the circulation of different fluids representing the cooler and later stages in the hidrothermal evolution of La Bodera veins is proposed.