摘要
三塘湖盆地地处东准噶尔构造带的东南部,是我国北方重要的产煤、产油气盆地。依据煤田钻孔测井数据,盆地北侧汉水泉凹陷中部中、新生代地层显示大量放射性异常,为铀矿找矿提供了重要线索。为深入了解区内砂岩型铀矿成矿潜力,本次研究针对汉水泉地区中部放射性异常集中区开展钻探验证,查明了储铀层位和铀矿化情况,分析汉水泉地区砂岩型铀矿成矿潜力和找矿方向。研究认为:(1)三塘湖盆地汉水泉地区铀矿化及异常主要分布于昌吉河群中段底部的灰色、黄色细砂岩和西山窑组上段顶部的灰色细砂岩中,铀异常分布范围广,但储铀砂体厚度较薄,铀品位偏低;(2)汉水泉地区昌吉河群地层具备有利的沉积建造条件和完善的“补-径-排”体系,后生蚀变及铀矿化显示良好,具备较好的找矿潜力,蚀源区铀源相对匮乏和地层还原剂含量不足是限制成矿的不利因素;(3)汉水泉凹陷异常区中部断裂带附近及其北侧可作为后续找矿的重点地区。
The Santanghu Basin is located in the southeast of the Junggar tectonic belt,and is an important coal-producing and oil-gas basin in northern China.Previous well logging data of coal field has identified abundant radioactive anomalies in the Mesozoic and Cenozoic of the Hanshuiquan area north of the basin,which provides an important clue for sandstone-type uranium prospecting.In order to better understand the metallogenic potential of sandstone-type uranium deposit in the area,this study conducted drilling verification in the central radioactive anomaly area of the Hanshuiquan area,identified uranium storage layers and mineralization,and further analyzed the mineralization potential and prospecting direction in the Hanshuiquan area.Results show that the uranium mineralization and anomalies in the Hanshuiquan area of the Santanghu Basin are mainly distributed in gray and yellow fine sandstones at the bottom of the middle Changjihe Group and gray fine sandstones at the top of the upper Xishanyao Formation.The uranium anomalies have a wide distribution,but the thickness of the uranium storage sandbody is thin and the uranium grade is low.The Changjihe Group in the Hanshuiquan area possesses favorable sedimentary formation and a complete supply-runoff-discharge system,with good epigenetic alteration and uranium mineralization,and a good prospecting potential.The relative scarcity of uranium sources and insufficient content of reducing agents in erosion source area are unfavorable for uranium mineralization.The area near the central fault zone and its north side in the anomaly area of the Hanshuiquan depression can be considered as key areas for subsequent mineral exploration.
作者
刘珉
周玉
朱永胜
邢建磊
孟李奇
赵建邦
陈林
朱彦虎
杨泽东
周军
LIU Min;ZHOU Yu;ZHU Yongsheng;XING Jianlei;MENG Liqi;ZHAO Jianbang;CHEN Lin;ZHU Yanhu;YANG Zedong;ZHOU Jun(Urumqi Comprehensive Survey Center on Natural Resources,China Geological Survey,Urumqi,Xinjiang 830057;Innovation Base of Metallogenic Prediction and Prospecting in Central Asia Orogenic Belt,Chinese Geological Society,Urumqi,Xinjiang 830057;School of Earth Resources,China University of Geosciences,Wuhan,Hubei 430074)
出处
《地质与勘探》
CAS
CSCD
北大核心
2024年第6期1105-1115,共11页
Geology and Exploration
基金
新疆维吾尔自治区自然科学基金青年基金项目(编号:2023D01B19)
中国地质调查局项目(编号:DD20211550)
中国地质调查局项目(编号:DD20242295)联合资助。
关键词
砂岩型铀矿
成矿条件
找矿方向
新近系
汉水泉凹陷
三塘湖盆地
sandstone-type uranium deposit
metallogenic condition
prospecting direction
Neogene
Hanshuiquan Depression
Santanghu Basin
