中国地质2017，Vol.44Issue(2)：279-287,9.DOI:10.12029/gc20170205
中国北方砂岩型铀矿成矿作用与油气关系研究
Research on relationship of oil-gas and sandstone-type uranium mineralization of northern China
摘要
Abstract
Interaction between oil-gas and sandstone type uranium has aroused much interest among geologists, especially uranium geologists. In spite of rapid development of mineralization theory for single energy mines, the study of interaction is very insufficient. Therefore, this problem should be regarded as the key frontier scientific issue which deserves investigation. Based on an analysis of distribution characteristics of uranium and oil-gas, microscope testing, geochemical calculation, it can be inferred that uranium enrichment can be improved by adsorption, reduction, uranium-supply and preservation of oil-gas, in which asphalt and organic acid, cracked by oil-gas, can adsorb uranium strongly. For reduction of oil-gas, high valence and activated uranium ion can be reduced to+4 valence and form stable uranium minerals by more reducing gas, such as H2, CH4, CO, and H2S. By means of acid dissolving, extraction and metallic-organic complexation, organic acid, produced by the interaction of oil-gas and SO42-, can accumulate partial uranium nearby surrounding rocks. And then this uranium can be released in mineralization location, which can reform mineralization and increase the source of uranium. Besides, more reducing H2, CO, escaping from oil-gas, can cause acidification and kaolinization of the formation, which leads to the feature that the oxidation zone is slightly alkaline and the metallogenic belt is slightly acidic. Therefore, the interaction between oil-gas and uranium can be very important for the determination of uranium-bearing beds, locating of uranium deposits, developing of mineralization theory, and oil-gas exploration guided by'chimney effect'.关键词
油气/砂岩型铀矿/分布特征/成矿作用/找矿启示Key words
oil-gas/sandstone-type uranium deposit/distribution characteristics/metallogenesis/ore-search inspiration分类
天文与地球科学引用本文复制引用
刘武生,赵兴齐,史清平,张梓楠..中国北方砂岩型铀矿成矿作用与油气关系研究[J].中国地质,2017,44(2):279-287,9.基金项目
国家科技部973项目(2015CB453004)、中国核工业地质局科研项目"柴达木盆地北缘铀成矿地质特征与远景评价"(201587)、中核集团龙腾二期"北方重点盆地砂岩型铀矿资源扩大与靶区优选"及国土资源部公益性行业科研专项"半干旱沉积盆地铀矿扫面技术示范区地质研究与异常解释"(201511034-3)联合资助. Support by National Key Basic Research Program of China (973 Program)(No. 2015CB453004), China Nuclear Industry Geological Survey Program(No. 201587),China National Nuclear Corporation Longteng Phase Ⅱ Program and Public Welfare Industry Scientific Recearch Projects of Ministry of Land and Resources (No.201511034-3). （2015CB453004）
