摘要
铀源条件是砂岩型铀矿形成的物质基础和主控因素之一,岩石中铀含量和铀析出能力是衡量铀源条件的关键指标。为评价伊犁盆地蚀源区的铀源条件,根据野外地质调查结果,系统采集了伊犁盆地蚀源区不同类型岩石样品和地表水样品,测定了岩石样和水样中铀的含量,分析了不同岩石中铀的含量和铀的析出能力。结果表明:伊犁盆地蚀源区与赛里木湖流域补给区的地层条件基本一致,赛里木湖水的铀异常显示伊犁盆地具有较丰富的铀源条件;伊犁盆地蚀源区内广泛分布的石炭-二叠系花岗岩的含铀性最好且铀的析出能力强,是研究区内最重要的铀源,火山碎屑岩中含铀量中等但铀的析出能力很强,也是区内重要的铀源,沉积岩中含铀量低,且铀的析出能力较弱,铀源条件较差。
Uranium source conditions are the material basis and main controlling factors for the formation of sandstone-type uranium deposits.The uranium content and uranium precipitation capacity in rocks are key indicators for measuring uranium source conditions.Based on field geological survey,this paper collects rock samples of different types of rock and surface water samples from Yili Basin,tests the uranium content in rock samples and water samples,analyzes the uranium content and uranium precipitation capacity in different rocks,and evaluates the uranium source conditions in the source area of Yili Basin.The results show that the stratigraphic conditions of the source area of Yili Basin are basically the same as that of the Sailimu Lake Basin.Thus,the uranium anomalies in the Sailimu Lake indicate that Yili Basin is rich in uranium source.Moreover,the widely distributed Carboniferous-Permian granites in the source area are the richest in uranium content and easily dissolved into groundwater,which is the most important uranium source of Yili Basin in the region.Besides,the volcanic clastic rocks contain medium uranium,but the uranium precipitation ability is very strong,which is also an important uranium source in the area.The sedimentary rocks have low uranium content and weak precipitation capacity,which is poor in uranium source conditions.
作者
何忧
荣辉
彭浩
黄琨
马青青
万军伟
HE You;RONG Hui;PENG Hao;HUANG Kun;MA Qingqing;WAN Junwei(School of Environmental Studies,China University of Geosciences(Wuhan),Wuhan 430074,China;School of Resources,China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《安全与环境工程》
CAS
北大核心
2019年第6期8-14,共7页
Safety and Environmental Engineering
基金
国家重点研发计划子课题项目(2018YFC0604202)
中央高校基本科研业务费专项资金项目(CUG170410)
关键词
铀源条件
地表水化学特征
岩石中铀含量
铀析出能力
伊犁盆地蚀源区
uranium source condition
surface water chemistry characteristics
rock uranium content
uranium precipitation capacity
source area of Yili Basin
