Caracterización de los fluidos en sucesivas fases de fracturación en las Cadenas Costero Catalanas y su registro en los filones de Ba-F de baja temperatura
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A. Canals [1] ; E. Cardellach [2]
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[1] Universitat de Barcelona
Universitat de Barcelona
Barcelona, España
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[2] Universitat Autònoma de Barcelona
Universitat Autònoma de Barcelona
Barcelona, España
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- Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 3, 1996, págs. 696-699
- Idioma: español
- Títulos paralelos:
- Fluid characterization in successive faulting epidodes in the Catalonian Coastal Ranges and their record in the Ba-F low temperature veins
- Enlaces
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Resumen
In the F-Pb-Zn Berta mine (Catalonian Coastal Ranges), fluid inclusion, stable and radiogenic isotope data have allowed to recognize two different and temporally separated hydrothermal events. The first is characterized by mixing of two fluids of contrasting sa/inities (from 3 to 20% NaCI eq.) and temperalures (80 to 200ºC). The fluid having the lower salinity and higher temperature has a 8 rno around -1.2%a, suggesting a surficial origin. The second event is dominated by low salinity (up to 5% NaCI eq.) and low temperature (120ºC) meteoric waters, chemically similar to the nearby La Carriga-Samalus geothermal waters. Strontium isotopes in fluorites suggest a relationship of the hydrothermal episodes to rifting periods of Triassic-jurassic and Miocene age respectively.
