摘要
本文以广西区域布格重力异常为主,结合其它地质资料,探讨了广西深部地质与成矿预测中的应用。认为:广西东部地壳为四层结构;河池一靖西重力梯级带是前寒武纪岩石圈断裂带,也是构成广西境内扬子地台与华南褶皱系的隐伏界线:右江重力高反映的局部幔隆,是右江裂谷系形成的地球动力基础:南岭重力低反映了多期次花岗岩化与陆壳增厚;总结了广西花岗岩15个岩带的空间展布和演化特征。还探讨了提取成矿预测信息的7条原则。
Based on the regional Bouguer gravity anomalies and other geological information , the paper discusses the deep geology and mineralization prognosis in Guangxi. It consideres that the crust in
eastern Guangxi is characterized by four layers in structures ;Hechi——Jingxi gradient zone of gravity
anomalies is the Cambrian lithospheric fracture zone and also constitutes the concealed boundary between Yangtze Platform and South China fold system; the partial mantle uplift shown by gravity positive is the dynamic basis of the earth for forming Youjiang rift system; the Nanning gravity negative reveals multiple granitization and thickening of the crust. It also shows the distribution in space and evolution of fifteen granite belts in Guangxi and expounds seven principles for obtaining the data of mineralization prognosis.
