RT Journal Article
T1 Las rocas volcánicas neógenas de Nuévalos (provincia de Zaragoza)
A1 Ancochea Soto, Eumenio
A1 Muñoz García, Mercedes
A1 Sagredo Ruiz, Juana
AB 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.
PB Sociedad Geológica de España
SN 0213-683X
YR 1987
FD 1987-12
LK https://hdl.handle.net/20.500.14352/58269
UL https://hdl.handle.net/20.500.14352/58269
LA eng
DS Docta Complutense
RD 28 abr 2025