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Título:
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Las rocas volcánicas neógenas de Nuévalos (provincia de Zaragoza)
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Autores:
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Ancochea Soto, Eumenio ;
Muñoz García, Mercedes ;
Sagredo Ruiz, Juana
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Tipo de documento:
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texto impreso
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Editorial:
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Sociedad Geológica de España, 1987-12
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Geología: Petrología
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Tipo = Artículo
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Resumen:
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On the basis of petrological data, the ultra-alkaline character of the volcanics from Nuévalos is clearly pointed out. This character rejects any type of relationship with Permian and Mesozoic volcanic events. Furthermore, analogies with plio-quaternary volcanics from Cofrentes suggest a similar episode related to a tensional regime that can be linked to the openning of the Valencia gulf. The volcanics are massive and look a porphyritic crystalline texture. Mineralogical composition define them as olivine-nephelinite rocks. They have a large amount of xenocrysts from mantle spinel-peridotite. The high xenocryst accumulation percentage has modified the original character of the primary melt. The whole geochemical data suggest a parental magma derived by a very low degree of melting (4,3%) from a peridotitic mantle source, strongly enriched in incompatible elements, and from a depth near to 100 km.
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En línea:
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https://eprints.ucm.es/id/eprint/9873/1/1987_IBERICA_Nuevalos.pdf
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