Datos geoquímicos de roca total para la secuencia volcanosedimentaria Cretácica en Cuale-El Rubí, Jalisco, y Tierra Caliente, Guerrero, México

Abstract

Whole rock geochemical analyses of two areas in the Cretaceous volcanic-sedimentary belt of central Mexico are presented. The felsic explosive, dome-forming volcanism in Cuale-El Rubí, Jalisco, is classical magmatism in active continental margins These rocks contain massive sulfides and the geochemistry suggests a magmatic series of the calc-alkaline type. The rocks from Tierra Caliente, Guerrero, have mafic lavas al the base and chloritized tuffs host massive sulfides. These rocks are alkaline and were probably formed by rifting in a back-arc basin on the western margin of Mexico in the Cretaceous . The volcano-sedimentary belt is a metallotecton featuring mineralization of Pb-Zn-Ag, Barite and Mn.