二连盆地乌尼特坳陷砂岩型铀成矿古水文地质条件分析  

Analyses on paleo hydrogeological conditions of sandstone type uranium metallogeny in Wennite depression of Erlian Basin

作　　者：周舰 李占春[1] 王常东[1] 林天发 唐国龙 余弘龙 于兵 吴燕清 董小宇 ZHOU Jian;LI Zhanchun;WANG Changdong;LIN Tianfa;TANG Guolong;YU Honglong;YU Bing;WU YanQing;DONG Xiaoyu(Geological Party No.243,CNNC,Chifeng 024000,Inner Mongolia,China)

机构地区：[1]核工业二四三大队,内蒙古赤峰024000

出　　处：《矿产勘查》2024年第S01期390-399,共10页Mineral Exploration

基　　金：中国核工业地质局铀矿调查项目“内蒙古二连盆地赛音胡都-乌里雅斯太地区铀矿资源调查评价”(202102-6)资助。

摘　　要：本文在分析二连盆地乌尼特坳陷基底、盖层结构特征基础上,对坳陷的古气候古水文地质条件开展研究,包括坳陷中各凹陷的地下水的形成发展史、同生沉积水的形成、分布及演化过程及地静压力系统、水静压力系统对地下水的改造作用。经分析认为,压挤水运动方向与盆缘补给区的含氧含铀水运动方向相反,在其径流过程中,两种不同性质的地下水相遇的混合部位,是水动力条件和水化学环境的变异部位,铀元素在这里富集成矿,并由此提出了铀成矿的有利时期及层位。On the base of analyzing features of basement,cap structure of Wunite Depression in Erlian Basin,the paleoclimate conditions of depression are studied,for example,underwater’s formation and development his-tory,forming and development process,reformation effect of geostatic pressure system and hydrostatic pressure on underground water.The terrastatic moving direction contrasts that of oxygenated and uranium-bearing water from recharge areas of the basin margin.Two different property of underwater meet on the mixed parts where hydrodynamic condition and hydrochemistry environment varies during runoff process.Uranium enriched and mineralized in these varied parts.Uranium metallogenic favorable periods and layers are forecasted by this way.

关 键 词：二连盆地 乌尼特坳陷 砂岩型铀矿 古水文地质条件 

分 类 号：P31[天文地球—固体地球物理学]