鄂尔多斯盆地北部特拉敖包地区铀矿化特征及控矿因素分析  

Characteristics and Ore-controlling Factors of Uranium Mineralization in Telaaobao Area,Northern Ordos Basin

作　　者：李振成 李华明 剡鹏兵 李玲 王龙辉 LI Zhencheng;LI Huaming;YAN Pengbing;LI Ling;WANG Longhui(Geologic Party No.208,CNNC,Baotou,Inner Mongolia 014010,China)

机构地区：[1]核工业二〇八大队,内蒙古包头014010

出　　处：《铀矿地质》2024年第5期899-910,共12页Uranium Geology

基　　金：中国核工业地质局项目“鄂尔多斯盆地北部铀矿资源调查评价与勘查”(编号:202201)资助。

摘　　要：鄂尔多斯盆地是我国重要的含铀盆地,2019年在鄂尔多斯盆地北部特拉敖包地区实现了下白垩统环河组找矿新突破。文章通过研究特拉敖包矿产地含矿层砂岩岩石学特征和矿化特征,分析其控矿因素,以期为扩大该地区铀矿找矿新突破提供找矿线索。研究认为,特拉敖包地区含矿层位主要为下白垩统环河上段,赋矿岩性以绿褐色、褐绿色中砂岩、细砂岩为主;铀矿体具有多层性,铀成矿具有多期性等特征;铀成矿主体受自北向南层间氧化带控制,矿体空间定位还受砂体的非均质性和岩石地球化学等因素联合控制。Ordos Basin is an important uranium bearing basin in China.In 2019,a new breakthrough was achieved in the exploration of Lower Cretaceous Huanhe Formation in Telaaobao area of the northern part of Ordos Basin.The article studied the petrological and mineralization characteristics of sandstone in the ore bearing strata of Telaaobao occurrences,analyzed the controlling factors,and provided the prospecting clues for expanding new breakthroughs in uranium exploration in the region.Research found that the ore bearing strata in Telaaobao area were mainly in the upper section of Lower Cretaceous Huanhe Formation,with the main ore bearing rock types being green brown,brownish green medium sandstone,and fine sandstone;Uranium ore bodies occurred in multiple layers,and uranium mineralization was characterized by multiple stages;The main body of uranium mineralization was controlled by the interlayer oxidation zone from north to south,and the spatial positioning of the ore body was also jointly controlled by factors such as the heterogeneity of the sand body and rock geochemistry.

关 键 词：环河组 铀矿化特征 控矿因素 特拉敖包 鄂尔多斯盆地北部 

分 类 号：P619.14[天文地球—矿床学]