地质通报2017，Vol.36Issue(10)：1850-1866,17.
内蒙古开鲁盆地砂岩型铀矿热流体作用
Hot fluid flows in the sandstone-type uranium deposit in the Kailu basin, Northeast China
摘要
Abstract
The discovery of the Qianjiadian-Baixingtu uranium deposit (QBUD) in the Kailu basin extremely encourages explorers to look for in-situ leaching uranium deposits (ISLUD) in the post-Jurassic extensional basins in Northeast China. There is a well-de-veloped faulted system in and near QBUD. The famous Xilamulun River fault passes through the deposit. Diabase related to regional faults is extensive throughout QBUD. It is estimated that 70%~80%of the exploration drilling holes meet the diabase beds. The cystic and lenticular orebodies in QBUD conflict with the interlayered oxidation genesis, which holds the generation of rollfront or tabular orebody. The core observation, microscope, electronic microprobe and inclusion temperature and salinity provide three kinds of evi-dence. Firstly, the heat from the diabase intrusion causes the hardness of the wall rocks, and a great number of new cement minerals are precipitated from hot fluid flows. Secondly, carbonate veins penetrate strata in handy specimen or under microscope. The clasitc grains in target sandstone are strongly altered by hot fluid flow. Further studies reveal three stages of carbonate minerals: 1st stage cal-cite, 2nd stage ferrous dolomite and 3rd stage high ferrous dolomite. Thirdly, there are three peaks for the inclusion temperature, 80~90℃, 110~120℃ and 140~150℃, respectively, and three ranges of inclusion salinity 5.0%~10.0%NaCl,10.1%~15.0%NaCl and 15.1%~20.07%NaCl. They are in accord with three stages of hot fluid flow processes.关键词
砂岩型铀矿/热流体/蚀变矿物学/包裹体/开鲁盆地Key words
sandstone-type uranium deposit/hot fluid flow/alteration mineralogy/inclusion/Kailu basin分类
天文与地球科学引用本文复制引用
聂逢君,严兆彬,夏菲,李满根,卢亚运,蔡建芳,郭福能,宁君..内蒙古开鲁盆地砂岩型铀矿热流体作用[J].地质通报,2017,36(10):1850-1866,17.基金项目
国家重点基础研究发展规划973计划《中国北方砂岩型铀矿流体成矿过程研究》(编号:2015CB453002)和国家自然科学基金项目《吐哈盆地南缘挤压背景下的层间-渗入铀成矿作用》(批准号:40972067)及《二连盆地西缘隆起区卫境岩体抬升剥蚀与盆内铀成矿耦合机理研究》(批准号:41772068) （编号:2015CB453002）
