La diferenciación petrográfica y geoquímica de las rocas ígneas del Arroyo Farandón (Asturias)

• Autores: M. Barrero, Luis Guillermo Corretgé Castañón
• Localización: Geogaceta, ISSN 0213-683X, Nº. 32, 2002, págs. 135-138
• Idioma: español
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• Resumen

  • This paper deals with the Arroyo Farandón (Asturias) igneous sills, which intruded within the sedimentary rocks of Oville Formation. They have alkaline composition and are classified as trachytes. As a consequence of a new detailed survey, continuous zonation has been distinguished along the main sill, which show outstanding developing of vesicular-amigdalar zones at the top and bottom of the body, suggesting vesiculation processes controlled by temperature gradients. Slight geochemical variations across the sills have been recorded