%0 Journal Article %A Huertas Coronel, María José %A Ancochea Soto, Eumenio %T Mecanismos de evolución magmática en los diquesmicrodioríticos de la sierra de Guadarrama %D 1991 %@ 0213-683X %U https://hdl.handle.net/20.500.14352/58274 %X In the Central System of Spain outcrop se vera I dyke swarms of late-hercynian age. They aremainly 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 theindividual microdioritic swarms, it can be observed that they exhibit more defined compositional and evolutionary trends. These trends are different from one microdioritic swarm to another. Thevariations can be justified by different crystal fractionation models and reflect heterogeneities in thesource or differences on the melting process. %~