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相山矿田沙洲铀矿床围岩蚀变地球化学特征

曹小兵 吕古贤 胡宝群 郑光高 姚宏鑫 梁东

曹小兵, 吕古贤, 胡宝群, 等, 2012. 相山矿田沙洲铀矿床围岩蚀变地球化学特征. 地质力学学报, 18 (4): 389-400.
引用本文: 曹小兵, 吕古贤, 胡宝群, 等, 2012. 相山矿田沙洲铀矿床围岩蚀变地球化学特征. 地质力学学报, 18 (4): 389-400.
CAO Xiao-bing, LÜ Gu-xian, HU Bao-qun, et al., 2012. THE WALL ROCK ALTERATION AND ITS GEOCHEMICAL CHARACTERISTICS OF THE SHAZHOU DEPOSIT IN XIANGSHAN URANIUM ORE-FIELD. Journal of Geomechanics, 18 (4): 389-400.
Citation: CAO Xiao-bing, LÜ Gu-xian, HU Bao-qun, et al., 2012. THE WALL ROCK ALTERATION AND ITS GEOCHEMICAL CHARACTERISTICS OF THE SHAZHOU DEPOSIT IN XIANGSHAN URANIUM ORE-FIELD. Journal of Geomechanics, 18 (4): 389-400.

相山矿田沙洲铀矿床围岩蚀变地球化学特征

基金项目: 中国核工业集团公司重点专项"相山矿田构造体系构建与铀成矿作用研究
详细信息
    作者简介:

    曹小兵(1986-), 男, 中国地质大学(北京)硕士研究生, 矿物学、岩石学、矿床学专业。E-mail:531718792@qq.com

  • 中图分类号: P614;P619.14

THE WALL ROCK ALTERATION AND ITS GEOCHEMICAL CHARACTERISTICS OF THE SHAZHOU DEPOSIT IN XIANGSHAN URANIUM ORE-FIELD

  • 摘要: 江西相山铀矿田沙洲铀矿床的矿体严格受断裂控制,围岩蚀变分带非常明显。对沙洲铀矿床围岩蚀变的地球化学特征进行的研究表明,沙洲矿床从矿石到围岩的化学成分具有明显的变化,这些化学成分的变化与蚀变过程中物质的带入带出是密切相关的。通过对全部样品进行R型聚类分析,确定矿床成矿元素组合为U、W、HREE、Th、Zn、Zr、Mo、Pb,这些元素可作为铀成矿预测标志。研究成果在一定程度上充实和丰富了沙洲铀矿床的成因认识。

     

  • 图  1  相山铀矿田区域地质与铀矿床分布图[7]

    1—白垩系砂砾岩;2—上侏罗统中酸性火山岩;3—次花岗斑岩;4—燕山期花岗岩;5—华力西期花岗岩;6—加里东期花岗岩;7—铀矿床;8—上三叠统砂岩;9—中元古界变质岩;10—远古宇(未分)变质岩;11—断裂;12—推测深大断裂;13—火山颈(推测);14—研究区

    Figure  1.  The regional geology and uranium deposit distribution of the Xiangshan ore-field

    图  2  沙洲矿床地质构造与矿化示意图[3]

    1—凝灰岩及流纹英安岩;2—碎斑熔岩;3—推覆体变质岩;4—基底变质岩;5—花岗岩;6—断裂构造;7—火山环状断裂;8—钻孔见矿范围;9—矿体

    Figure  2.  A map showing the geological structure and mineralization of Shazhou deposit

    图  3  沙洲矿床8号勘探线剖面图和含矿裂隙图

    Figure  3.  Maps showing the profile of No.8 prospecting line and the ore-bearing fractures

    图  4  沙洲矿床-58 m中段蚀变剖面素描图

    1—次花岗斑岩;2—钠长石化;3—铀-赤铁矿化;4—铀-萤石化;5—绿泥石化;6—推测蚀变渐变界限;7—取样位置及编号

    Figure  4.  A sketch map of the alteration profile in the -58 m layer of Shazhou deposit

    图  5  沙洲矿床从矿石到围岩主量元素含量变化

    Figure  5.  Content changes of the major elements from ore to wall rock in Shahzhou deposit

    图  6  沙洲矿床从矿石到围岩微量元素含量的变化

    Figure  6.  Content changes of the trace elements from ore to wall rock in Shazhou deposit

    图  7  沙洲矿床花岗斑岩的稀土图谱和微量元素蛛网图[14~15]

    Figure  7.  Chondrite-normalized REE distribution patterns and primitive mantle normalized multi-element patterns of the granite porphyry in Shazhou deposit

    图  8  沙洲矿床微量元素R型聚类分析谱系图

    Figure  8.  Hierarchical diagram of R-type cluster analysis of the trace elements in Shazhou deposit

    表  1  沙洲矿床-8 m、-58 m和-98 m中段矿体剖面主量元素化学成分

    Table  1.   Chemical compositions of the major elements from -8 m, -58 m and -98 m sections of Shazhou deposit

    表  2  沙洲矿床-8 m、-58 m和-98 m中段矿体剖面微量元素含量(10-6

    Table  2.   Chemical compositions of the trace elements from -8 m, -58 m and -98 m sections of Shazhou deposit

    表  3  沙洲矿床-8 m、-58 m和-98 m中段矿体剖面稀土元素化学成分

    Table  3.   Chemical compositions of the rare-earth elements from -8 m, -58 m and -98 m sections of the Shazhou deposit

    表  4  沙洲矿床岩石元素含量相关性分析矩阵

    Table  4.   Corellation matrix of the elements in rocks from Shazhou deposit

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  • 收稿日期:  2012-07-12
  • 刊出日期:  2012-12-28

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