地学前缘 ›› 2016, Vol. 23 ›› Issue (4): 148-165.DOI: 10.13745/j.esf.2016.04.013

• 华南地区构造与成矿 • 上一篇    下一篇

南岭九龙脑矿田典型矿床构造解析:以淘锡坑钨矿床为例

 刘战庆, 刘善宝, 梁婷, 王登红, 裴荣富, 梁力杰, 张树德   

  1. 1. 中国地质科学院 矿产资源研究所, 北京 100037
    2. 桂林理工大学 地球科学学院, 广西 桂林 541004
    3. 长安大学 地球科学与资源学院, 陕西 西安 710054
    4. 崇义章源投资控股有限公司, 江西 赣州 341300
  • 收稿日期:2015-05-29 修回日期:2015-08-28 出版日期:2016-07-15 发布日期:2016-07-15
  • 通讯作者: 刘善宝(1970—),男,博士,副研究员,主要从事成矿规律研究与成矿预测。Email:liubaoshan7002@163.com
  • 作者简介:刘战庆(1975—),男,博士,主要从事构造地质学与矿田构造的教学与科研工作。E-mail:lzqgygcx2008@163.com
  • 基金资助:

    国土资源部公益性行业科研专项(201411050,201411035);国家科技支撑计划项目(2011BAB04B07);中央地质勘查基金项目(2013360010)

Structural analysis of Jiulongnao orefield in Nanling area: A case study on Taoxikeng tungsten deposit.

 LIU  Zhan-Qiang, LIU  Shan-Bao, LIANG  Ting, WANG  De-Gong, FEI  Rong-Fu, LIANG  Li-Jie, ZHANG  Shu-De   

  1. 1. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
    2. College of Earth Sciences, Guilin University of Technology, Guilin 541004, China
    3. School of Earth Science and Resources, Chang an University, Xian 710054, Chian
    4. Zhangyuan Investment Holdings Limited, Ganzhou 341300, China
  • Received:2015-05-29 Revised:2015-08-28 Online:2016-07-15 Published:2016-07-15

摘要:

南岭九龙脑矿田淘锡坑钨矿是赣南地区典型的石英脉型黑钨矿床,受断裂构造与花岗岩体控制。本文通过8个中段坑道填图,结合地表钻和坑内钻揭露,对含矿石英脉、矿脉组、矿体以及成矿花岗岩体的几何形态、结构构造进行仔细观测,统计矿脉及成矿后断裂产状并进行构造解析。淘锡坑黑钨矿石英脉矿体整体呈平直长板状,具有尖灭侧现,单脉之间以左行斜列为主,而矿脉组呈菱形网格状排列等特征;花岗岩体呈矩形块状、阶梯状。岩突以顶蚀和岩墙扩展两种方式由南东向北西侵位。矿床为多期多阶段的成岩成矿,断裂对花岗岩的侵位与成矿起到主导控制作用。本文综合分析并构建了淘锡坑钨矿构造岩浆的成矿演化模式,即区域构造应力作用生成共轭断裂构造网格体系,然后岩浆侵位上拱被共轭断裂切割的“几何体”围岩移位而侵位,并沿共轭断裂体系内充填云英岩脉、含矿石英脉体,完成一次成岩成矿作用;区域构造再次活动使围岩与花岗岩体发生断裂,并再次诱导岩浆侵位,在早期花岗岩体和围岩内断裂中形成矿体和云英岩脉体,从而形成内带和外带含矿石英脉;成岩成矿后区域构造小规模错动、破坏岩脉与矿脉,但未改变岩脉矿脉的整体展布。

关键词: 成矿构造解析, 构造岩浆作用与成矿, 淘锡坑石英脉型黑钨矿床, 南岭九龙脑矿田

Abstract:

Taoxikeng tungsten deposit of Jiulongnao orefield in Nanling area is a typical quartzveintype wolframite deposit, and was formed both by the limits of faults and the granites in the south area of Jiangxi Province. In order to do structural analysis of the deposit, eight middletunnels mapping and nearground or hole drillings were completed, by which the geometry and structural and constructional characteristics of orebearing quartz veins, vein group, ore body and ore bearing granites were measured in detail, as well as collected statistical data of occurrences of ore veins and orerelated faults. The quartz vein orebodies existed in long straight plates with pinch out ends, and arranged in sinistral diagonal pattern, and the vein groups in different trend were crossed each other in diamond stockwork shapes. The ore bearing granite is a steplike rectangular block emplaced by stoping and dyke spreading intruded from NE to NW. The deposit and orebearing granite is of multiperiod in metallogeny and was formed by faults in a predominant factor. Thus the paper established a comprehensively structural and magmatic metallogenic model. That is, the conjugate fault grid system was induced by regional geological stress firstly; the granite upwelled and emplaced in diamonds cut by the faults and filled with greisen and orebearing quartz veins secondly; thirdly, reaction of regional tectonic events triggered breaks in wall rock and granite that induced another magma intrusion with ore and greisen veins, such as inner and outer belts of orebearing quartz veins. Although there were some slight displacements in the veins, the whole distribution was unchanged.

Key words: structural analysis of metallogeny, tectono magma event and metallogeny, Taoxikeng wolframite, Jiulongnao orefield in Nanling area

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