Geoquímica de los basaltos alcalinos del Pérmico superior del sector de Anayet (Pirineo central, Huesca)

• Autores: Carlos Galé Bornao, Marceliano Lago San José, Enrique Arranz Yagüe, Andrés Gil Imaz, Andrés Pocoví Juan
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 6, 1, 2004 (Ejemplar dedicado a: IV Congreso Geológico de España (Zaragoza, 12-15 julio, 2004)), págs. 49-52
• Idioma: español
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• Resumen

  • The permian basalts of the Anayet area (Central Pyrenees, Huesca) show an evolved composition with a subalkaline to alkaline affinity, supported by their high Ti and P contents and their mineral assemblage (Ti-augite). Geochemical data suggest an enriched mantle source (HIMU) for the origin of this magmatism and the high contents of Ba, Th and U can be explained by interaction of the crust with the magma. The emplacement of these basalts within Upper Pemian red beds is related to the onset of a extensional regime during Permian times.