RT Journal Article
T1 Geoquímica y origen de los fluidos asociados a los yacimientos de fluorita de "Berbes-La Cabaña" y "La Collada" (Asturias)
T1 The chemistry and origin of the fluids related to the fluorites from "Berbes-La Cabaña" and La Collada" (Asturias)
A1 González Laguna, Ruth
A1 Banks, D.
A1 López García, José Ángel
A1 Vindel, E.
AB This study evaluates a-CI-Br systematic of fluid inclusions in fluorites from "Berbes-La Cabaña" and "La Collada" districts in Asturias (N of Spain). The fluorites were formed as H20-NaCI-Ca2CI fluids represented by primary inclusions (Lwl) showing moderate salinity (Tm:-l 2.4° to -6.6°C) and homogenization temperature between 130° to 150°C. Lw2 inclusions are secondary with low salinity (Tm:-2.9 to -2.7°C) and global homogenization ranging between 130° to 135°C. Hypersaline Lw-s inclusions have distinguished in La Collada district. The high salinity of these inclusions could be explained as resulting of reequilibration processes. Comparison ofNa-CI-Br compositions show fundamental differences in halogen chemistry between two regions. Crush-leach extraction ana chemical analysis of the inclusions from "Berbes-La Cabaña fluorites reveals that the fluid chemistry is influenced by the fluid-rock interaction with Na-Ca exchange. The low concentration of Br suggest a brine derived from halite dissolution by reaction with evaporites. In contrast, Cl/ Br and Na/Br decrease strongly In brines from "La Collada" fluorites and are similar to modern seawater.These halogen ratios are consistent with solutes derived from evaporation of seawater.
PB Sociedad Geológica de España
YR 1996
FD 1996
LK http://hdl.handle.net/10272/13277
UL http://hdl.handle.net/10272/13277
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026