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半干旱荒漠草原覆盖区地气测量方法研究——以内蒙古维拉斯托锌铜多金属矿床为例
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  • 英文篇名:Geogas Measurement Experiments in the Semi-arid Desert Steppe:An Example of the Weilasituo Zn-Cu Polymetallic Deposit in Inner Mongolia
  • 作者:郭祥义 ; 叶荣 ; 鲁美 ; 韩志轩 ; 王永康 ; 张文慧 ; 王可祥
  • 英文作者:GUO Xiangyi;YE Rong;LU Mei;HAN Zhixuan;WANG Yongkang;ZHANG Wenhui;WANG Kexiang;School of Earth Sciences and Resources,China University of Geosciences,Beijing;Key Laboratory of Geochemical Exploration,MLR,Institute of Geophysical and Geochemical Exploration,CAGS;Inner Mongolia Weilasituo Mining Co.Ltd.;
  • 关键词:半干旱荒漠草原 ; 深穿透地球化学 ; 地气测量 ; 锌铜多金属矿 ; 维拉斯托 ; 内蒙古
  • 英文关键词:semi-arid desert steppe;;deep penetrating geochemistry;;geogas;;Zn-Cu polymetallic deposit;;Weilasituo;;Inner Mongolia
  • 中文刊名:DZKT
  • 英文刊名:Geology and Exploration
  • 机构:中国地质大学(北京)地球科学与资源学院;国土资源部地球化学探测重点实验室中国地质科学院地球物理地球化学勘查研究所;内蒙古维拉斯托矿业有限公司;
  • 出版日期:2019-05-15
  • 出版单位:地质与勘探
  • 年:2019
  • 期:v.55;No.484
  • 基金:国家自然科学基金项目(编号:41573037、41273063);; 国家重点研发项目(编号:2016YFC0600602-2)联合资助
  • 语种:中文;
  • 页:DZKT201903010
  • 页数:12
  • CN:03
  • ISSN:11-2043/P
  • 分类号:119-130
摘要
半干旱荒漠草原是我国重要的地貌景观类型,由于长期受风成沙的干扰,常规化探方法在该区找矿效果不理想。本文以位于内蒙古半干旱荒漠草原覆盖区的维拉斯托锌铜多金属矿为研究对象,进行了地气测量实验。同时,为筛选地气组分中的有效指示元素,对矿石矿物进行了采样分析。结果表明该矿区矿石矿物主要为闪锌矿、黄铜矿、磁黄铁矿、毒砂,成矿元素主要为Cu、Zn、Ag、As、Fe,部分矿石中Pb、Bi、Cd、Mn、Ni含量较高。地气组分中异常元素种类与矿石成矿及伴生元素一致,且异常位置与隐伏矿体基本吻合。地气与矿石、围岩的稀土元素(REE)球粒陨石标准化配分图解显示,异常区地气REE配分特征与矿石接近,说明地气成分继承了隐伏矿体的地球化学信息。以上研究证明地气测量可作为半干旱荒漠草原覆盖区寻找隐伏锌铜多金属矿的有效手段。
        Semiarid grassland is an important landscape type in China. Due to the impact of wind and sand,conventional geochemical exploration methods cannot work well for mineral exploration in these areas. The geogas survey method is one possible approach to solve this problem. This paper presents an experiment on this technique in the Weilasituo zinc-copper polymetallic deposit in the semi-arid grassland of Inner Mongolia. To choose indicator elements of geogas components in this area,we have analyzed ore samples. The results show that( 1) sphalerite,chalcopyrite,pyrrhotite,arsenopyrite are the main minerals. Cu,Zn,Ag,As and Fe are dominant mineralization elements,and the content of Pb,Bi,Cd,Mn and Ni in some minerals is high.( 2) The types of geochemical anomalies in the geogas are consistent with the elements of the ores in this area,and largely match the positions of the concealed orebodies.( 3) The chondrite-normalized REE patterns of geogas,ore and surrounding rocks suggest that the REE characteristics of geogas are close to those of the ores,implying the composition of the geogas contains geochemical information of hidden orebodies. This experiment proves that the geogas survey method is an effective tool to search for concealed zinc-copper polymetallic deposits in semiarid grassland areas.
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