Las albititas del Paleozoico Inferior del occidente de Asturias: ¿posible fuente de leucogranitos?

• Autores: Marcos García Arias, Luis Guillermo Corretgé Castañón, Antonio Castro Dorado
• Localización: Geogaceta, ISSN 0213-683X, Nº. 40, 2006, págs. 147-150
• Idioma: español
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• 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.