鄂尔多斯盆地砂岩型铀矿成矿作用和前景分析  

Metalllogenic Models and Prospective Analysis of Sandstone-type Uranium Deposits in Ordos Basin

作　　者：李子颖[1] 秦明宽[1] 蔡煜琦[1] 方锡珩[1] 郭庆银 易超[1] 夏毓亮[1] 孙晔 张字龙[1] 贾立城[1] LI Ziying;QIN Mingkuan;CAI Yuqi;FANG Xiheng;GUO Qingyin;YI Chao;XIA Yuliang;SUN Ye;ZHANG Zilong;JIA Licheng(Beijing Research Institute of Uranium Geology,Beijing 100029,China;China Notional Uranium Co.Ltd.,Beijing 100013,China)

机构地区：[1]核工业北京地质研究院,北京100029 [2]中国铀业有限公司,北京100013

出　　处：《铀矿地质》2020年第1期1-13,共13页Uranium Geology

基　　金：中核集团集中研发项目“二连基地砂岩型铀矿地质数字平台和大数据找矿预测”(编号:地LCEQ03)资助。

摘　　要：鄂尔多斯盆地为我国大型油气、煤炭和铀多种能源矿产产出盆地。新世纪以来铀矿成矿理论技术研究和勘查取得了系列重大突破,对推进砂岩型铀矿找矿具有重要意义。文章概要分析了鄂尔多斯盆地的构造沉积演化9大阶段、基本特征及其区域控矿作用;从全盆尺度论述了砂岩型铀矿的时空分布特征;阐述了盆地东北部地区、西缘宁东地区、西南部国家湾地区、东南部店头地区的铀矿化特征,在此基础上提出了该4片地区砂岩型铀矿的成矿模式,对找矿实际发挥了重要的指导作用;最后,基于矿床模型综合地质信息预测技术,对全盆地不同找矿层位的铀成矿远景进行了定量预测,为后续找矿提供了依据。Ordos Basin is a large basin hosting multiple energy resources like oil-gas, coal and uranium etc. in China. Since the beginning of the 21^th century, remarkable breakthrough has been made in sandstone-hosted uranium metallogeny and its exploration techniques, which is of great significance to promote new discovery and the exploration for uranium resources. The paper summarized the 9 stages of tectonic-sedimentary evolution, basic characteristics and the regional ore-controlling factors of Ordos Basin. In addition, the paper presents the spatial and temporal distribution signatures of the sandstone-hosted uranium deposits, demonstrates the uranium metallogenic features of the northeastern part,Ningdong Area in the northwestern margin, Guojiawan Area in the southwestern part as well as Diantou Area in the southeastern part of the Ordos Basin, based on the above results, metallogenic models of the sandstone-hosted uranium deposits in the aforementioned four areas have been defined, which will provide signaficant guidance for practical exploration. To conclude, by adopting the prediction techniques based on the comprehensive geological information of the deposit models, comprehensive quantitative prediction on the uranium metallogenic prospects of different layers across the basin has been conducted, which laid the foundation for the future prospecting.

关 键 词：鄂尔多斯盆地 砂岩型铀矿 成矿作用 成矿前景 

分 类 号：P619.14[天文地球—矿床学]