二连盆地巴彦乌拉铀矿床赛汉组下段煤层与铀成矿关系研究  

Study on relations between coal bed and uranium mineralization at Lower member of Sanhan Formation in Bayanwula uranium deposit of Erlian basin

作　　者：高贺伟 王贵[3] 唐大伟[3] 严兆斌[4] 陈凤兴 

机构地区：[1]吉林大学地球科学学院,长春130012 [2]中国核工业集团公司,北京100822 [3]核工业二0八大队,内蒙古包头014010 [4]东华理工大学核资源与环境教育部重点实验室,南昌330013

出　　处：《世界核地质科学》2017年第3期131-136,144,共7页World Nuclear Geoscience

基　　金：中国核工业地质局铀矿地质勘查项目(编号:201601);中国地质调查局地质调查项目(编号:DD2016013608)联合资助

摘　　要：巴彦乌拉铀矿床是我国发现的第一个古河谷可地浸砂岩型铀矿床,铀矿体产于赛汉组上段古河道砂体中,主要受层间氧化带控制。含矿砂体底部与赛汉组下段顶部煤层直接接触,煤层在变质过程中释放出大量的CH_4、NH_3、H_2S、H_2等煤成气,提供氧化-还原过程中的主体还原介质,形成"气障"效应,减缓了含氧含铀层间水的运移,一定程度上控制了层间氧化带的产出部位和形态。Bayanwula uranium deposit is the first paleovalley leachable sandstone type uranium deposit discovered in China. Uranium ore occurred in braided river sand body of Upper member of Saihan Formation and controlled by inter-layer oxidation zone mainly. The top coal layer of Lower member of Saihan Formation contacted directly with bottom layer of ore-bearing sandstone. Large amounts of CH_4、NH_3、 H_2S、 H_2 may be released during the deterioration process of coal layer, which could provide main reducing medium for the oxidation-reduction process and produce a ＂ gas barrier＂ effect in ore-bearing sandstone, to slow down the migration of water with oxygen and uranium, and hence controlled the location and morphology of the interlayer oxidation zone to some extent.

关 键 词：砂岩型铀矿 煤层 赛汉组 巴彦乌拉 二连盆地 

分 类 号：P619.14[天文地球—矿床学] P618.11[天文地球—地质学]