Las mineralizaciones de wolframio asociadas a la granodiorita de Santa Coloma (Andorra)
The late Hercynian Santa Coloma granodiorite intruded Paleozoic metasediments of upper Ordovician to Devonian age. Several forms of tungsten-bearing ores are found associated to the Santa Coloma granodiorite in the Central Pyrenees: veins, filled joints and skarns. Fluid inclusion study in quartz cr...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1996 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/13297 |
| Acceso en línea: | http://hdl.handle.net/10272/13297 |
| Access Level: | acceso abierto |
| Palabra clave: | Tungsten Scheelite, Hercynian Vein Skam Pyrenees |
| Sumario: | The late Hercynian Santa Coloma granodiorite intruded Paleozoic metasediments of upper Ordovician to Devonian age. Several forms of tungsten-bearing ores are found associated to the Santa Coloma granodiorite in the Central Pyrenees: veins, filled joints and skarns. Fluid inclusion study in quartz crystals from veins suggests that the mineralising fluid was a polysaline brine (22 wt% NaCI eq.) wich was trapped at 360 ±30 °C and 2.5 ±0.3 kbar, even the first mineralizing stage could be formed at higher temperatures (up to 500°C). Preliminary data of 8 MS of sulphides from skarn and vein mineralizations show values near 5 ± 1%o suggesting a sulphur of magmatic origin |
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