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金属矿山 ›› 2015, Vol. 44 ›› Issue (01): 90-93.

• 地质与测量 • 上一篇    下一篇

洪海沟铀矿床头屯河组岩相特征及对铀成矿的控制

邱余波1,2,伊海生3,罗星刚2,王毛毛2,乔淇2,刘杰2   

  1. 1.成都理工大学核技术与自动化工程学院,四川 成都 610059;2.核工业二一六大队,新疆 乌鲁木齐 830011;3.成都理工大学沉积地质研究院,四川 成都 610059
  • 出版日期:2015-01-15 发布日期:2015-07-28
  • 基金资助:

    * 全国铀矿资源调查评价计划项目(编号:1212011220775),整装勘查关键基础地质研究计划项目(编号:12120114007601)。

Lithophase Characteristics of Toutunhe Formation and Its Control on Uranium Mineralization in Honghaigou Uranium Deposit

Qiu Yubo1,2,Yi Haisheng3,Luo Xinggang2,Wang Maomao2,Qiao Qi2,Liu Jie2   

  1. 1.College of Applied Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China;2.No.216 Geological Team,China National Nuclear Corporation,Urumqi 830011,China;3.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China
  • Online:2015-01-15 Published:2015-07-28

摘要: 头屯河组是伊犁盆地近年来发现的砂岩型含铀矿层位。通过对盆地南缘洪海沟铀矿床头屯河组重要的控矿因素——岩性岩相特征进行系统分析,找出其独特的成矿规律,为该地区的铀找矿工作提供重要的理论依据。根据研究区头屯河组的岩性特征、砂体发育特征、砂地比平面展布特征,结合区域沉积体系演化特征,分析认为头屯河组在研究区主要为1条近东西向展布的主河道,河道两侧为河漫滩,河漫滩外侧为洪泛平原。在主河道的局部位置,砂体变薄,为河心泥滩沉积。沉积时期的沉积环境、河心泥滩的发育、沉积微相的相变对铀成矿有着重要的控制作用,而含矿流体垂直于河道方向渗流并最终形成工业铀矿体,是头屯河组有别于其他含矿层位、独特的铀成矿模式。

关键词: 洪海沟铀矿床, 砂岩型铀矿, 头屯河组, 岩相特征, 控矿因素

Abstract: Toutunhe formation is the new-discovered stratum bearing sandstone-type uranium ore in Yili Basin in recent years.The lithology-lithophase characteristics that are the important ore-controlling factors of Tountunhe formation of Honghaigou uranium deposit in southern margin of Yili Basin is analyzed systemically so as to discover its special metallogenic regularity and to provide important theoretical evidence for the following uranium exploration work in Yili Basin.According to the characteristics of lithology,development of sandbody,and the ratio of sand to stratum,and combing with the evolution of regional sedimentary sysyem,it is concluded that,Toutunhe formation is a main channel along west to east.Both sides of the channel is the flood land,and outside of the flood land is the floodplain.In the local area of the main channel,the sandbody becomes thinner,and the sandbody is the mudflat deposition in the middle of channel.The sedimentary environment in the sedimentary period,the development of mudflat in the middle of channel and the phase change of sedimentary micro-phase are the important ore-controlling factors for uranium mineralization.The ore-bearing fluid that is perpendicular to the direction of the channel seeps and forms the industrial uranium orebody eventually,which is the special metallogenic model compared with other ore-bearing stratum in Yili Basin.

Key words: Honghaigou uranium deposit, Sandstone-type uranium ore, Toutunhe formation, Lithophase characteristics, Ore-controlling factor