广西中生代花岗岩石成因及其成矿专属性的初步探讨

摘要

Granites are widespread in Ouangxi Province, and distributed in four tectonicmagmatic belts. Geochemical characteristics of these Mesozoic granites can be outlined as: (1) petroebemically being rich in silica, alkali and volatiles; (2) low oxidation ratio ond relatively high A1 index and K2O/Na2O ratio. As indicated by their geochemical,petroiogieal and mineralogical features, many granites in Guangxi belong to S type,frequently associated with mineralizations of rare-earth, tin, tungsten, niobium and tantalum.