摘要
为查明共和盆地西缘临夏组地层砂岩型铀矿成藏特征,以区内已发现的铀矿化点为依托,对该区铀源、赋矿地层、构造演化、水文地质、古气候及铀矿化信息等条件进行系统分析,认为区内第三系临夏组具备砂岩型铀矿成矿的基本地质条件。研究表明区内铀源充足,成矿期区内为少雨干旱气候,湖泊三角洲相、辫状河相的沉积层广泛分布,“补-径-排”水动力系统发育完整,矿化点附近临夏组地层层间氧化带发育、铀元素含量可达工业品位。综合来看,共和盆地临夏组砂岩型铀矿成矿前景良好,值得进一步深入调查。
In order to find out the reservoir forming characteristics of sandstone type uranium deposits in Linxia formation along the western margin of Gonghe basin and on the basis of discovered uranium mineralization points in this area,the uranium source,ore bearing strata,tectonic evolution,hydrogeology,paleoclimate and uranium mineralization information are systematically analyzed.It is considered that the tertiary Linxia formation in this area has the basic geological conditions for sandstone type uranium deposits.Research shows that the uranium source in this area is sufficient and the region had a dry climate with little rain during the main mineralization stage;Lacustrine delta facies and braided riverfacies are widely distributed,and the hydrodynamic system of“supplement-runoff-discharge”is well developed;The interlayer oxidation zone of Linxia formation near the mineralization location is developed,and the abnormal high value can be seen in the energy spectrum measurement of uranium element.On the whole,the sandstone-type uranium deposit of Linxia formation in Gonghe basin has a good metallogenic prospect and is worthy of further investigation.
作者
李吉庆
陈建洲
晁海德
蔡廷俊
刘立波
赵洪岳
LI Jiqing;CHEN Jianzhou;CHAO Haide;CAI Tingjun;LIU Libo;ZHAO Hongyue(Qinghai Fourth Geological Exploration Institute,Xi’ning 810029,China;Qinghai Key Laboratory of Shale Gas Resources,Xi’ning 810029,China)
出处
《地质装备》
2022年第6期38-41,共4页
Equipment for Geotechnical Engineering
关键词
砂岩
铀矿
共和盆地
层间氧化带
靶区
sandstone
uranium deposits
gonghe basin
interlayer oxidation zone
target area
作者简介
李吉庆(1995—),男,本科,地质学专业,助理工程师,主要从事油气、清洁能源矿产勘查工作,E-mail:982405198@qq.com。
