松辽盆地铁法地区砂岩型铀矿关键控矿因素的时空耦合
彭虎 , 焦养泉 , 荣辉 , 逄礴 , 吕东霖 , 郭晓丹 , 王庆双 , 宇文晓依
地球科学 ›› 2024, Vol. 49 ›› Issue (09) : 3182 -3198.
松辽盆地铁法地区砂岩型铀矿关键控矿因素的时空耦合
Spatial-Temporal Coupling of Key Ore-Controlling Factors for Sandstone-Type Uranium Deposits in Tiefa Area, Songliao Basin
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松辽盆地东南部的铁法地区白垩系新发现一处铀矿产地和多个铀矿化点.本文结合区域地质背景调查和 1 000余个钻孔资料分析,由源到汇对研究区铀成矿系统的铀储层砂体、层间氧化带及还原介质等关键控矿因素进行了定量化系统研究.研究表明铁法地区铀成矿作用主要经历了沉积阶段的预富集期和层间氧化阶段主成矿期两个重要阶段.区域构造驱动下的盆山耦合作用不仅控制着铀源的形成与迁移,也是两个成矿阶段之间构造反转作用的驱动力.研究区铀矿化分布规律与铀储层砂体非均质性、氧化砂体规模、还原介质等控矿因素具有明显的空间耦合关系.泉头组三段(泉三段)含铀岩系的“泥‒砂‒泥”结构完整,铀矿化线索明显,是该区砂岩型铀矿成矿最有利层位,其次是研究区西部阜新组底部的砂砾岩.泉三段铀储层砂体由厚变薄,含砂率由高变低,氧化砂体厚度与氧化砂体比率变小,以及灰色泥岩和煤层等外部还原地质体由薄变厚的部位是该区砂岩型铀矿成矿最有利区域.
砂岩型铀矿 / 松辽盆地 / 泉三段 / 铀储层 / 控矿因素 / 沉积学 / 矿床学.
sandstone-type uranium deposit / Songliao basin / 3rd member of Quantou Formation / uranium reservoir / ore-controlling factors / sedimentology / ore deposits
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国家重点研发计划项目(2018YFC0604202)
辽宁省级地质勘查项目(LNZC2019-0078-10)
东北地质科技创新中心区创基金项目(QCJJ2022-38)
中国地质大学(武汉)构造与油气资源教育部重点实验室开放基金(TPR-2024-04)
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