马岭花岗岩体铀成矿地质条件及找矿潜力分析

Analysis of geological condition and prospecting potential of uranium metallogenesis in Maling granite mass

在研究马岭花岗岩体区域地质构造演化、岩体及外围地层含铀性、岩石地球化学和已知铀矿化空间分布规律及控矿构造的基础上,提出了4点认识:即(1)马岭复式岩体属S型重熔花岗岩;(2)富铀地层重熔导致了区域矿物质汇聚区的形成;(3)岩浆演化是热液富铀的物质基础;(4)NE向主导断裂导矿和旁侧陡倾斜断裂(裂隙)及地层破碎构成了有利于铀供源和聚沉的成矿系统。查明了该地区矿石类型为酸性矿石。分析了马岭花岗岩体的找矿潜力,指明了进一步找矿空间。

Based on the study of regional geological evolution of Maling granite mass,uranium content of granite mass and its peripheric strata,petrogeochemistry and the known spatial distribution pattern of uranium mineralization and ore-controlling structures,new recognition is 1）Maling composite mass is the＂S＂type re-melted granite,2）the accumulative area of regional uranium metallogenic substances forms uranium-rich re-melted strata,3）magma evolution is the matter base for the uranium-rich hydrotherm,4）NE-trending main faults are channels for metallogenesis and the lateral high-angle dipping faults,fractures and interlayer fractures in the peripheric strata are the spaces of mineralization.The ore intersected by drilling in Maling granite is acidic type.Prospecting potential of Maling granite mass is analyzed,and preferable prospecting space is delineated for further exploration.