Show simple item record

dc.contributor.authorAncochea, Eumenio
dc.contributor.authorSagredo, J.
dc.contributor.authorMuñoz, Mercedes
dc.description.abstractOn the basis of petrological data, the u/tra-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 Iow degree of melting (4,3%) from a peridotitic mande source, strongly enriched in incompatible elements, and from a depth near to 700 km.es_ES
dc.publisherSociedad Geológica de Españaes_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherOlivine nepheliniteses_ES
dc.subject.otherPartial meltinges_ES
dc.subject.otherUpper mandees_ES
dc.titleLas rocas volcánicas neógenas de Nuévalos (provincia de Zaragoza)es_ES

Files in this item

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España

Copyright © 2008-2010. ARIAS MONTANO. Repositorio Institucional de la Universidad de Huelva
Contact Us | Send Feedback |