CAJ | 학술논문

下庄铀矿田具轻稀土元素富集，轻稀土分馏强烈，重稀土分馏作用微弱的特点，但矿石LREE / HREE比值小于围岩，比围岩具更为明显的负铕异常。H、O同位素组成显示矿前期和成矿期的富成矿流体是由两部分组成：主要的是沿伸展构造上升的地幔流体、次要的是基性岩浆分异演化形成的流体；成矿后期的流体主要由大气降水组成。流体中的C主要来源于中新生代与区域深大断裂有关的幔源脱气作用，同时伴有壳源有机碳的来源。流体包裹体的均一温度从成矿早期-成矿期-成矿后期逐渐降低，但不同矿体、不同成矿期的流体盐度相差不大，均比较低。
하장유광전구경희토원소부집，경희토분류강렬，중희토분류작용미약적특점，단광석LREE / HREE비치소우위암，비위암구경위명현적부유이상。H、O동위소조성현시광전기화성광기적부성광류체시유량부분조성：주요적시연신전구조상승적지만류체、차요적시기성암장분이연화형성적류체；성광후기적류체주요유대기강수조성。류체중적C주요래원우중신생대여구역심대단렬유관적만원탈기작용，동시반유각원유궤탄적래원。류체포과체적균일온도종성광조기-성광기-성광후기축점강저，단불동광체、불동성광기적류체염도상차불대，균비교저。
The features of Xiazhuang uranium ore field: light REE enrichment and fractionation strong, heavy REE fractionation weak, but the LREE/HREE ratio is less than the surrounding rock, and has more obvious negative europium anomalies than surrounding rock. H, O isotopic composition show rich ore-forming lfuid, pre and metallogenic epoch, is composed of two parts:the main is mantle lfuid along the extensional tectonic rising, secondary lfuid is formed maifc magmatic differentiation evolution;Fluid later stage mainly is composed of meteoric water. The carbon in the lfuid mainly comes from the Mesozoic Cenozoic mantle degassing related with the regional deep fault, meanwhile with crust derived organic carbon source. Homogenization temperature of fluid inclusions gradually decreased from early metallogenic metallogenic period-metallogenic stage-late metallogenic stage, but the lfuid salinity of different ore bodies and different ore-forming stage, has little difference.