白城-通辽地区第三系地浸砂岩铀成矿后生氧化条件分析  

Epigenetic Oxidation of Tertiary Sediments and Its Contribution to In-situ Leachable Sandstone Uranium Mineralization in the Baicheng-Tongliao Area

作　　者：张振强[1,2] 桑吉盛 金成洙[1] 

机构地区：[1]东北大学资源与土木工程学院 [2]核工业二四〇研究所,辽宁沈阳110032

出　　处：《地球学报》2005年第5期461-464,共4页Acta Geoscientica Sinica

基　　金：国家教育部博士点基金项目(编号:1999014513)资助。

摘　　要：通过对白城-通辽地区第三系后生氧化的空间形态、矿物组合、伴生元素分带及Fe3+/Fe2+比值等方面研究认为,泰康组主要发育潜水氧化,其中的铀矿化规模小、找矿意义不大;大安组主要发育层间氧化,所见铀矿化有层间氧化特点,具有形成大型地浸砂岩型铀矿床的前提,值得进一步加强找矿探索。Based on studying spatial distribution of epigenetic oxidation, mineral associations, zoning of accompanying elements, Fe ^3 ＋/Fe ^2 ＋ ratios of epigenetic oxidation in Tertiary Da＇an Formation and Taikang Formation, this paper concludes that the oxidation type of Taikong Formation belongs to phreatic oxidation and that of Da＇an Formation to phreatic-interstratified oxidation. Uranium mineralization in Taikang Formation is small in size and hence of no importance in uranium exploration. On the contrary, mineralization in Dan＇an Formation has the features of interformational oxidation which provides prerequisite for the formation of large-size sandstone uranium deposits. Hence, the Da＇an Formation is a favorable formation for ore prospecting in this area.

关 键 词：白城-通辽地区 第三系 后生氧化 地浸砂岩型铀矿 地浸砂岩型铀矿床 氧化条件 通辽地区 铀成矿 找矿意义 空间形态 

分 类 号：P619.14[天文地球—矿床学] TQ531.6[天文地球—地质学]