Elementos de geoquímica das rochas do maciço ígneo de Sines

Abstract

Key-wordJ: Geochemistry - Igneous complex of Sines - Portugal. The chemical and mineralogical characteristics of the intrusive and extrusive rocks of this igneous complex are presented. The suggest affinities between these rocks. The major and the trace elements lead us to conclude that these rocks were originated in a common magmaric chamber by fractional crystallization.