Mecanismos de evolución magmática en los diques microdioríticos de la sierra de Guadarrama.
ISSN: 0213-683X
Any de publicació: 1991
Número: 10
Pàgines: 93-97
Tipus: Article
Altres publicacions en: Geogaceta
Resum
In the Central System of Spain outcrop several dyke swarms of late-hercynian age. They are mainly composed by granitic porphyry and microdioritic dykes. The last one, when globaly considered, show scattering in the contents of most of the major and trace elements. When we study the individual microdioritic swarms, it can be observed that they exhibit more defined compositional and evolutionary trends. These trends are diferent from one microdioritic swarm to another. The variations can be justified by different crystal fractionation models and reflect heterogeneities in the source or differences on the melting process