Las albititas del Paleozoico Inferior del occidente de Asturias: ¿posible fuente de leucogranitos?
- García Arias, Marcos
- Corretgé Castañón, Luis Guillermo
- Castro Dorado, Antonio
ISSN: 0213-683X
Año de publicación: 2006
Número: 40
Páginas: 147-150
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
In the West Asturian-Leonese Zone there are some albititic beds of volcanoclastic origin interlayered in the lower part of the Serie de los Cabos, deposited in a graben-type basin during the Middle Cambrian. The mineralogy is plagioclase (albite), rutile, sheet silicates and sometimes quartz, carbonates and chlorite-serpentine cryptocrystalline masses. Melting experiments at 850ºC, 6 kbar and added 10% water conditions produce very silicic melts, with different rates of melting according to quartz percentage, but the fertility of these rocks as sources of leucogranites is very low.