Evolución de los fluidos hidrotermales en la génesis de los sulfuros masivos de Aznalcóllar (Faja Pirítica Ibérica): evidencias a partir de inclusiones fluidas.

Toscano, M. ^[1] ; Sáez, R. ^[1] ; Almodóvar, G.R. ^[1]
1. [1] Universidad de Huelva
  
  Universidad de Huelva
  
  Huelva, España
Localización: Geogaceta, ISSN 0213-683X, Nº. 21, 1996 (Ejemplar dedicado a: 21a Sesión Científica, Huelva 1996), págs. 211-214
Idioma: español
Títulos paralelos:
- Hydrothermal fluid evolution during the genesis of the Aznalcóllar massive sulphides (Iberian Pyrite Belt): fluid inclusion evidences
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Resumen
- Fluid inclusion data from Aznalcóllar and Los Frailes stockworks indicate that hydrothermal fluids changed continuously in temperature and salinity, both in time and space. Th values change from 140 to 380 oC and salinity from 0.4 to 12.4 NaC/ eq. The highest values for both parameters have being found for central stockworks and later fluids. Statistic population analysis of fluid inclusion data points to three stages of hydrothermal activity, at low <200 ºC intermediate (200-300 °C) and high temperatures (300-400 ºC). Salinity values show similar variation trend with higher values for the last hydrothermal stage.