新疆伊犁盆地尼勒克凹陷铀成矿潜力  

Hydrogeological Conditios of Uranium Mineralization in Nileke Depression in Yili Basin,Xinjing

作　　者：康勇[1] 张大绪[1] 王冰[1] 

机构地区：[1]核工业二一六大队

出　　处：《现代矿业》2015年第3期90-93,共4页Modern Mining

摘　　要：尼勒克断陷是在石炭纪和二叠纪裂谷变形基底上的裂陷盆地,早期的控盆构造活动使得盆地断陷成形并沉积了巨厚的侏罗系砂岩,提供了有利的铀储层。阐述了尼勒克盆地侏罗系地层发育特征,结合大地构造背景分析了早期控盆构造及新构造活动对铀成矿的影响;从水补-径-排特征、地下水水文地球化学特征、构造特征等几个方面分析了尼勒克凹陷铀成矿的有利因素。分析认为尼勒克凹陷内吉林台—乌拉斯台地区,侏罗系地层厚度大、分布范围宽广,地下水补-径-排体系完整,铀源充足,是铀成矿的有利地区。Nileke fault depression is the crack basion that is formed on the deformation basement of Carboniferous and Permian rift valley,the early basin-controlling tectonic activities make the downfaulted basin form and deposit the thick of the Jurassic sandstone,the favorable uranium reservoir is provided.The development characteristics of Nileke basin in Jurassic formation is analyzed,the influence of the early basin-controlling tectonic and new tectonic activities and the new uranium mineralization is analyzed based on the tectonic background. Nileke sunken uranium mineralization favorable factors are discussed from the perspective of the filling water-runoff-drainage characteristics,groundwater hydrogeochemical characteristics,tectonic characteristics. The analysis results show that,the Jurassic strata thickness of Jilintai-Wulasitai area in Nileke sunken is large,the range of distribution is wide,the filling water-runoffdrainage system is complete,the uranium source is adequate,therefore,the area is favorable for uranium mineralization.

关 键 词：尼勒克凹陷 铀储层 水文地球化学特征 构造特征 成矿潜力 

分 类 号：P619.14[天文地球—矿床学]