柯树北花岗岩体中金－铀矿脉的初步研究

柯树北花岗岩体中的金－铀矿脉主要产出在岩体的西南部。该岩体Ｕ－Ｐｂ同位素年龄１５３Ｍａ，定位在两条深大断裂的复合部位。通过岩石化学及稀土元素特征研究表明，岩体与华南重熔再生岩浆成因的陆壳改造型花岗岩相一致。矿脉为石英－硫化物型，金、铀矿化与微晶石英和细晶、微晶黄铁矿关系密切。岩体的铀、金丰度高于本区任何其它岩石，矿脉有往深部变好的趋势，推测本区具有良好的成矿前景。

PRELIMINARY RESEARCH ON GOLD-URANIUM VEINS IN KESHUBEI GRANITE MASSIF

The gold-uranium veins are located in the southwest part of Keshubei granite massif emplaced in the superimposed position of two deep faults and its U-Pb isotopic age is 153 Ma. Astudy on petrochemistry and REE characteristics of the granite massif are consistent to thoseof the continental crust-transformation type granite of remelted and regenerated magmaticgenesis in South China. The gold-uranium veins are of quartz-sulfide type and closely associated with microcrystalline quartz and fine-grained,micro-grained crystalline pyrite. Uraniumand gold abundances in the granite massif are higher than those in other rocks in the same region,showing that veins seem to be more productive at the deep part. It is presumed that theregion exhibits a good potential for gold-uranium.