开鲁盆地钱家店铀矿区铼的地球化学特征与成矿作用  

Geochemical Characteristics and Rhenium Mineralization,Qianjiadian Uranium Deposit,Kailu Basin

作　　者：陈振岩[1] 王雷 崔向东[2] 单芝波 宋柏荣[2] 张雷[1] CHEN ZhenYan;WANG Lei;CUI XiangDong;SHAN ZhiBo;SONG BaiRong;ZHANG Lei(Development Company of New Energy Sources of Liaohe Petroleum Exploration Bureau,Panjin,Liaoning 124010,China;Liaohe Oilfield Exploration and Development Research Institute,Panjin,Liaoning 124010,China)

机构地区：[1]辽河石油勘探局新能源开发分公司,辽宁盘锦124010 [2]辽河油田勘探开发研究院,辽宁盘锦124010

出　　处：《沉积学报》2022年第3期739-752,共14页Acta Sedimentologica Sinica

基　　金：国家重点研发计划(2018YFC0604205);中国石油天然气集团公司科学研究与技术开发项目(2019A-4809(GF))。

摘　　要：通过对开鲁盆地钱家店铀矿床中稀散元素铼(Re)的地球化学特征研究,并结合前人成果,探讨了研究区与铀相伴生的铼元素成矿作用。结果表明,钱家店铀矿床砂岩铀矿石中稀散元素Re的含量高,已完全达到伴生矿综合利用指标,可以尝试在地浸液循环过程中加以析出。Re与Fe^(2+)/Fe^(3+)、Se、U及有机碳相关性好,有较密切的共生关系;与稀土元素相关性极差,揭示了相异(相反)于稀土元素表生稳定的性质。钱家店地区铼矿床的形成经历了五个阶段:铼预富集阶段、上白垩统姚家组含矿主岩形成及沉积成矿阶段、层间渗入氧化水动力主成矿阶段、古近纪浅层氧化改造及热活动铼叠加成矿阶段、新近纪油气扩散还原保矿阶段,这五个阶段与该区铀的空间分布具有较好的相似性。This study discusses the mineralization of rhenium associated with uranium in the Qianjiadian uranium deposit.Present studies of the geochemical characteristics of rhenium in this area are combined with previous research results.The content of rhenium in the sandstone uranium ore of the Qianjiadian uranium deposit is high,and has reached the comprehensive utilization index.Re correlates well with Fe^(2+)/Fe^(3+),Se,U and organic C,indicating a close symbiotic relationship.The very poor correlation with rare earth elements suggests less stability than the surface stability of rare earth elements.The formation of the rhenium deposit in the Qianjiadian area has undergone five stages:pre-enrichment;the formation of ore-bearing main rocks in the Upper Cretaceous Yaojia Formation,and the sedimentary and metallogenic stages.The main ore-forming stages were interlayer oxidation and hydrodynamics,and shallow oxidation and modification in the Paleogene.The superposition and metallogenic stage of hydrothermal rhenium,and the ore-preserving stage of hydrocarbon diffusion and reduction in the Neogene.These five stages are very similar to the spatial distribution of uranium in the region.The similarity also determines the coexistence of uranium and rhenium in the same horizon and the enrichment in the same region on the stratum,which provides a basis for the joint exploration and mining of uranium and rhenium.

关 键 词：铼(Re) 稀散元素 钱家店 姚家组 砂岩型铼成矿 

分 类 号：P619.14[天文地球—矿床学]