二连盆地中部古河道砂岩型铀矿成矿机理及找矿方向  

Mineralization Mechanism and Exploration of Paleo channel Type Uranium Deposit in Central Erlian Basin

作　　者：刘武生[1] 康世虎[2] 赵兴齐[1] 史清平[1] 张梓楠[1] 

机构地区：[1]核工业北京地质研究院,中核集团铀资源勘查与评价技术重点实验室,北京100029 [2]核工业208大队,内蒙古包头014010

出　　处：《铀矿地质》2015年第A01期164-175,共12页Uranium Geology

摘　　要：通过巴赛齐古河道砂岩型铀成矿带内矿床地质分析，指明古河道是铀成矿的有利空间，构造反转是铀成矿的主控因素，氧化蚀变是铀成矿的必要条件；结合铀成矿时代研究，厘定了巴彦乌拉式、赛汉高毕式、齐哈日格图式铀成矿机理，构建了3种铀成矿模式，总结了铀源（外源和内源）、古河道（古河道规模、分布、沉积微相、水动力、岩性）、构造（基底构造、沉积间断、反转构造）、后生蚀变（潜水氧化、单侧层间氧化、两侧层间氧化、油气渗出）等4大类14小类预测标志，圈定优选了4片Ⅰ级、4片Ⅱ级、3片Ⅲ级预测区。According to the geological analysis of Ba Sai Qi paleo channel type uranium deposit,it was suggest that paleo channel is favorable space,structural inversion was the main dynamic factor and oxidation be the requite condition for uranium metallization. In combination with research of uranium for-mation age,the mineralization mechanism of Bayanwula type,Saihangaobi type,Qiharigetu type was studied and three metallogenic modesl was set up with 4 categories and 1 1 subcategories in the following indicators：source of uranium （internal and external）,paleo channel （size,distribution,micro sedimen-tary faces,hydrodynamic force,lithology）,structure （basement structure,deposition break,inversion structure）,epigenetic alteration （phreatic oxidation,unilateral interlayer oxidation,both sides of the in-terlayer oxidation,hydrocarbon diffusion）. With these models,4 level I,4 level II and 3 level III pros-pecting areas was prognosticated for further exploration in the basin.

关 键 词：二连盆地中部 古河道砂岩型铀矿 成矿机理 预测标志 成矿预测 

分 类 号：P612[天文地球—矿床学] P619.14[天文地球—地质学]