Geochemistry of the Cretaceous to Early Tertiary Granitic Rocks in Southern Korea Pt. Ⅱ. Trace Elements Geochemistry

About one hundred forty granitic rock samples of the Cretaceous to the Early Tertiary were analysed for 24 trace elements. The trace element data interpretations reveal the characteristics and petrogenesis of the granitic rocks as having been fractionally crystallized from diorite to alkali-feldspar granite from a calc-alkaline magma. In particular, strontium geochemistry involving strontium isotopic data, that is, strontium initial ratios (^87Sr/^86Sr) ₈ ranging from 0. 704 to 0. 7070, elucidate that the granitic rocks have been fractionally crystallized from a calc-alkaline magma which has originated from the mantle or from igneous sources.