Ensayo sobre la génesis de las rocas graníticas del Macizo Hespérico

Abstract

On basis in previous papers and in new data now available about granitic and metamorphic rocks of the Hesperian Massif the authors propose a general hypotesis on the different petrogenetic process. This hipotesis is based in the following points: a) Deep crustal origin of the calc-alcaline granitic rocks. b) Time-place relation among different types of metamorphism and granitic series. c) Geochemical character of this series. d) Genetic process of the autoctonous granites in migmatitic areas. e) Cordierite presence in the greater part of the granitic masses. f) Development of granitic series of anatectic mesocrustal origin in which participate caic-alcaline magmatic components. g) Contamination and evolution of the calcalcaline granitic series. The study and consideration on this aspects contributes to support that calcalcaline magmatic bodies are the rising thermal focus responsible for low pressure types of metamorphism and related anatectic process.