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作 者:吕永华 刘武生[2] 康世虎 徐亚雄 刘璐 LV Yonghua;LIU Wusheng;KANG Shihu;XU Yaxiong;LIU Lu(Geological Party No.208,CNNC,Baotou,Inner Mongolia 014010,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China)
机构地区:[1]核工业二〇八大队,内蒙古包头014010 [2]核工业北京地质研究院,北京100029
出 处:《铀矿地质》2019年第5期273-281,共9页Uranium Geology
基 金:中国核工业地勘基金项目“内蒙古二连盆地铀矿资源调查评价与勘查”(编号:201901);中核集团科技创新计划项目“二连盆地深部层位铀成矿关键地质问题研究与靶区优选”(编号:DZB162-1)联合资助
摘 要:为了进一步拓展二连盆地找矿空间,依据乌兰察布坳陷赛汉组下段的最新勘查进展,详细总结了赛汉组下段泥岩型和砂岩型两种铀成矿类型的铀矿化特征。从铀源体、构造反转与抬升、沉积体系发育特征及氧化带的空间展布、规模等角度,全面分析了乌兰察布坳陷赛汉组下段铀成矿地质条件,提出了该区赛汉组下段下一步勘查的方向,认为赛汉组下段铀矿化主要集中在坳陷边缘的次级凹陷斜坡带内,并且周边蚀源区具备富铀岩体,铀的活化、迁出率较高,地形远高于盆内沉积区。To further extend the prospecting space in Erlian Basin,uranium mineralization characteristics in sandstone and mudstone were summarized based on the exploration progress in the lower member of Saihan Formation in Wulanchabu depression.Metallogenic geologic conditions were analyzed in uranium sources,structure reversion and uplift,sedimentary system and spatial distribution of oxidation in the lower member of Saihan Formation of Wulanchabu depression.It was believed that uranium mineralization was mainly developed in the slope zones of sub-sag in the rim of the depression due to rich uranium content,higher uranium activating and migration rate in the source rock,therefore the future prospecting should focus on the slope zone.
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