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下庄铀矿田保存因素研究

张万良

张万良, 2013. 下庄铀矿田保存因素研究. 地质力学学报, 19 (2): 152-161, 187.
引用本文: 张万良, 2013. 下庄铀矿田保存因素研究. 地质力学学报, 19 (2): 152-161, 187.
ZHANG Wan-liang, 2013. STUDY ON PRESERVED-ORE FACTOR IN XIAZHUANG URANIUM ORE FIELD. Journal of Geomechanics, 19 (2): 152-161, 187.
Citation: ZHANG Wan-liang, 2013. STUDY ON PRESERVED-ORE FACTOR IN XIAZHUANG URANIUM ORE FIELD. Journal of Geomechanics, 19 (2): 152-161, 187.

下庄铀矿田保存因素研究

详细信息
    作者简介:

    张万良(1962-), 男, 博士, 高级工程师(研究员级), 铀矿地质学专业。E-mial:ZWL270@163.com

  • 中图分类号: P619.14

STUDY ON PRESERVED-ORE FACTOR IN XIAZHUANG URANIUM ORE FIELD

  • 摘要: 下庄矿田是我国落实的第一个花岗岩型铀矿田,矿床和矿点分布在贵东岩体的东部,受构造、岩性联合控制,矿化类型有硅化带型(群脉型)、交点型、蚀变碎裂岩型和花岗岩外接触带变质砂岩型,矿床形成后经历了华南地壳的新生代特别是晚新生代的隆升和剥露。成矿后的构造活动研究表明,上洞断裂和马屎山断裂是矿田的保矿构造,它们形成时代较新,联合控制了下庄断块的下陷,保护了之前形成的铀矿免受或少受侵蚀破坏,这也是贵东岩体东部有矿西部无矿的根本所在。

     

  • 图  1  贵东复式花岗岩体位置及地质略图[7]

    1—英安斑岩;2—细粒二云母花岗岩;3—中粗粒黑云母花岗岩;4—粗粒似斑状黑云母花岗岩;5—中粒似斑状二云母花岗岩;6—中粒似斑状黑云母花岗岩;7—中粗粒似斑状黑云母花岗岩;8—中细粒黑云母花岗岩;9—断层;10—不整合界线;11—岩体名称及编号(① 长坪岩体,② 寨头岩体,③ 宝林山岩体,④ 热水岩体,⑤ 隘子岩体,⑥ 下庄岩体,⑦ 司前岩体,⑧ 高栋岩体,⑨ 鲁溪岩体,⑩ 帽峰岩体)

    Figure  1.  Asketch geological map of the Guidong composite granite bodies

    图  2  上洞断裂剖面素描图

    1—燕山早期中粒斑状黑云母花岗岩;2—花岗质碎裂岩(裂隙发育带);3—棕红色构造泥;4—破碎带

    Figure  2.  Section sketch of the Shangdong fault

    图  3  上洞断裂构造特征

    Figure  3.  Structural features of the Shangdong fault

    图  4  马屎山断裂剖面示意图[18]

    1—上白垩统紫红色砂砾岩;2—马屎山断裂及运动方向;3—印支期片麻状花岗闪长岩

    Figure  4.  Section sketch map of Horse Feces Mountain fault

    图  5  上洞断裂和马屎山断裂控制的下庄断块剖面示意图

    1—上白垩统红层;2—泥盆系;3—花岗岩;4—硅化断裂带;5—断裂;6—铀矿化

    Figure  5.  Schematic profile of Xiazhuang fault block controlled by the Shangdong fault and Horse Feces Mountain fault

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  • 收稿日期:  2012-10-13
  • 刊出日期:  2013-06-28

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