铀矿地质2024，Vol.40Issue(1)：1-15,15.DOI:10.3969/j.issn.1000-0658.2024.40.001
渗出砂岩型铀矿成矿预测与找矿标志
Metallogenic Prediction and Exploration Indication of Exudative Sandstone-Type Uranium Deposit
摘要
Abstract
Based on the innovative mechanism and model of exudative sandstone-type uranium deposit,it is considered that the exudative metallogeny is different from infiltrating one and has different signatures and indications.Two key conditions should be firstly identified:one is the primary origin of uranium-bearing red-mottled sedimentary formation,the other one is the secondary reduction origin of ore-controlling grey sandstone body within the formation.The new targeting methods used to identify uranium mineralization in red-mottled sandstone pointed out:(1)combining information derived from the upper red and lower dark sedimentary formations,(2)identifying the pathways connecting the upper red formation with lower dark formation,and(3)finding the grey-greenish sandstone units in red-mottled formation,which hosts uranium mineralisation.Furthermore,this paper clarifies the conditions and indications for the regional prediction and evaluation,including presence of uranium-and organic matter-rich source rocks below the ore-bearing beds,regional structures,sedimentary formation,radioactive anomalies,and comprehensive predictive techniques.It is also pointed out that a small-sizeed depression can produce a large deposit.In addition,systematic predictive indications for exudative sandstone-type uranium deposits have been concluded,particularly easy macroscopic ones in the field work,such as ore-controlling structures,sedimentary configurations,alteration and modification,the color of uranium-mineralized sandstone and the characteristics of external organic matter.To be understood better,those indications are compared with traditional ones related to infiltrative sandstone uranium mineralization system.The established conditions and indications are not only of very significace to identify the origins of both"infiltration"and"exudation"metallogenies,but also with great values to clarify key ore-controlling factors,guide metallogenic prediction and exploration for the uranium deposits.关键词
渗出砂岩型铀矿/红杂色含矿建造/成矿预测/找矿标志Key words
exudative sandstone uranium metallogeny/red-mottled sandstone/metallogenic prediction/exploration indication分类
天文与地球科学引用本文复制引用
李子颖,纪宏伟,郭建,林锦荣,李西得,田明明,黄志新,衣龙升,王君贤,刘鑫扬,李伟涛,秦明宽,张云龙,何升,张字龙,郭强,欧光习,贾立城,何中波,吴玉,邢作昌,王文全,郭庆银,刘军港,韩美芝,骆效能,贺锋,蔡煜琦,钟军,刘武生,邱林飞,刘持恒..渗出砂岩型铀矿成矿预测与找矿标志[J].铀矿地质,2024,40(1):1-15,15.基金项目
国家重点基金项目"砂岩型铀矿铀及伴生元素与有机质迁移富集机理"(编号:U2167210) （编号:U2167210）
中国核工业地质局项目"鄂尔多斯盆地白垩系远景预测与找矿方向"(编号:202201-8) （编号:202201-8）
中核集团集中研发项目"第四代铀矿勘查关键技术研究与示范(第一阶段)"(编号:中核科发2021-143号)联合资助. （第一阶段）
