准噶尔盆地南缘下白垩统钙质砾岩铀矿化成因及找矿方向  

Uranium Mineralization and Prospecting Direction of Lower Cretaceous Calcareous Conglomerate in the Southern Margin of Junggar Basin

作　　者：唐湘飞[1] 贾为卫 鲁克改[1] 张强[1] Tang Xiangfei;Jia Weiwei;Lu Kegai;Zhang Qiang(Geologic Party No.216,CNNC,Urumqi,Xinjiang,830011,China)

机构地区：[1]核工业二一六大队,新疆乌鲁木齐830011

出　　处：《新疆地质》2018年第3期399-405,共7页Xinjiang Geology

基　　金：准噶尔盆地砂岩型铀矿资源调查评价项目(201609);新疆准噶尔盆地南缘喀拉扎地区铀矿调查评价项目(A14-2-LQ03)资助

摘　　要：准噶尔盆地南缘中新生界发育大量砂岩型铀矿点、矿化点,其成因目前存在较多争议,尤其是对赋存于下白垩统清水河组钙质砾岩中的铀矿化,存在潜水氧化带、层间氧化带,潜水-层间氧化带、油气还原-潜水氧化带及构造热液成矿等多种认识。通过资料收集、综合分析前人成果及近几年来区内开展的铀矿勘查实践,初步认为下白垩统清水河组钙质砾岩中铀矿化为层间氧化带砾岩型,矿化受层间氧化带控制,深部有次生还原与层间氧化作用叠加形成铀矿化的可能,该地区具较好的砂岩型、砾岩型铀矿找矿前景。There are a lot of sandstone type uranium mineralization and anomaly zone in Jurassic and Cretaceous in the southern margin of Junggar basin, There axe many controversies on the causes of them .Especially for uranium min- eralization hosted in calcareous conglomerates of the lower Cretaceous Qingshui River formation ,there are many under- standing of uranium mineralization, such as phreatic oxidation zone, interlayer oxidation zone,phreatic-interlayer oxida- tion zone,oil-gas reduction-phreatic oxidation zone and tectono hydrothermal mineralization.Through collecting data and analyzing the results of predecessors, besides the practice of uranium exploration in the region in recent years,It is considered that the ore forming because of the interlayer oxidation zone of conglomerate type,Mineralization is con- trolled by interlayer oxidation zone,there is possibility of secondary reduction and uranium mineralization in the deep, It has a good prospect for Sandstone and conglomerate type uranium ore prospecting.

关 键 词：准噶尔盆地 下白垩统 清水河组 钙质砾岩 铀矿化 

分 类 号：P534.53[天文地球—古生物学与地层学] P588.21[天文地球—地质学]