地质与资源2017，Vol.26Issue(2)：119-123,5.
内蒙古陈旗断陷东部伊敏组沉积相及铀成矿作用
SEDIMENTARY FACIES AND URANIUM METALLOGENESIS OF YIMIN FORMATION IN THE EAST OF CHENQI FAULT DEPRESSION, INNER MONGOLIA
摘要
Abstract
The Chenqi fault depression in eastern Inner Mongolia is an Early Cretaceous basin among the Hailar basin group.It is covered by the Tongbomiao,Nantun,Damoguaihe and Yimin formations.This mono-faulted basin is distributed nearly east to west,with strata inclining to southeast.During the depositional period of the Yimin Formation,the Chenqi fault depression entered the stage of reduction,when the fan delta in the south advanced to the center of the basin.The basin then was filled with a large number of marsh deposits to form coal-bearing strata.Simultaneously,with the northward regression of the lake,small river delta was formed on the northern slope of the basin.The water with uranium and oxygen from the pre-Quaternary gully and river channels vertically or laterally infiltrated into the oxidized lignite layer at the top of the watertight stratum.Uranium was then adsorbed by carbon deposits with secondary mineralization in the upper part of the coal seam.Therefore,this uranium mineralization belongs to phreatic water oxidation type.关键词
陈旗断陷/伊敏组/沉积相/铀矿化/内蒙古Key words
Chenqi fault depression/Yimin Formation/sedimentary facies/uranium mineralization/Inner Mongolia分类
天文与地球科学引用本文复制引用
罗敏,崔家瑞..内蒙古陈旗断陷东部伊敏组沉积相及铀成矿作用[J].地质与资源,2017,26(2):119-123,5.基金项目
中国地质调查局“内蒙古陈旗断陷宝日希勒地区铀矿地质调查”项目(编号 12120113076700). （编号 12120113076700）
