开鲁盆地钱家店铀矿区铼的地球化学特征与成矿作用

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Fe2+/Fe3+、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。

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

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 Fe2+/Fe3+， 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.