铀矿地质2026，Vol.42Issue(2)：250-259,10.DOI:10.3969/j.issn.1000-0658.2026.42.018
鄂尔多斯盆地彬县地区铀矿化特征及油气关系
Uranium Mineralization Characteristics and Its Relationship with Oil and Gas in Binxian Area,Ordos Basin
摘要
Abstract
Binxian area is located in the southern part of Ordos Basin and is currently a key exploration sector for Zhiluo Formation of Middle Jurassic in the southern region of the basin.To clarify the relationship between uranium mineralization and hydrocarbons in Zhiluo Formation of Binxian area,this study integrates methods such as microscopic identification,electron probe analysis,trace element analysis,and hydrocarbon component analysis,based on field investigations and core logging.The results indicate that lower member sandstones of Zhiluo Formation in Binxian area exhibit red and gray-green alterations,with the gray-green alteration being formed by the reduction of previously oxidized sandstone.Uranium mineralization is distributed in the paleo-interlayer oxidation zone and on the gray sandstone side of the redox transition zone.The ore-bearing sandstones are primarily gray medium-grained sandstones,coarse-grained sandstones,and pebbly coarse-grained sandstones.The uranium minerals are mainly coffinite and pitchblende,occurring interstitially between detrital grains or associated with pyrite.Uranium shows significant positive correlations with V,Re,Mo,organic C,and Se.The hydrocarbons in the lower member sandstones are primarily derived from deep-seated cracked natural gas of early crude oil.The hydrocarbon-bearing gases enhanced the reducing capacity of the sandstones,and provided sufficient reductants for subsequent uranium mineralization.关键词
砂岩型铀矿/油气/直罗组/鄂尔多斯盆地南部Key words
sandstone-type uranium deposit/oil and gas/Zhiluo Formation/southern Ordos Basin分类
天文与地球科学引用本文复制引用
刘凯鹏,王晓鹏,武正乾,刘坤鹏,冯博,王凯..鄂尔多斯盆地彬县地区铀矿化特征及油气关系[J].铀矿地质,2026,42(2):250-259,10.基金项目
中国核工业地质局项目"鄂尔多斯盆地南部旬邑－盐池地区铀矿资源调查评价与勘查"(编号:2022-17)和"甘肃省镇原县新庄地区铀矿普查"(编号:2024-17-1、2025-17-1)联合资助. （编号:2022-17）
