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Mineral Exploration and Resource Evaluation

Primary Halo Characteristics and Geological Significance of the Dongjianian Silver Deposit in Lingbao City,Henan Province

  • Qichao DUAN ,
  • Xucheng PANG ,
  • Rui ZONG ,
  • Di HAN ,
  • Yan ZHANG ,
  • Xin ZHANG
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  • 1.Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000, Henan,China
    2.No. 2 Institute of Geological & Mineral Resources Survey of Henan, Zhengzhou 450003, Henan,China

Received date: 2020-03-29

  Revised date: 2020-05-13

  Online published: 2020-08-27

Abstract

Dongjianian silver deposit is the only large deposit found in the south metallogenic belt of Xiao-qinling ore-gathering area. In order to coordinate with the smooth development of the deep exploration of the deposit,the change rule of the useful elements in the vertical direction of the deposit was understood,and the primary halo geochemical method was adopted to determine the change trend of the deep orebody by studying the primary halo characteristics of the typical ore deposit profile. By the analysis of mathematical statistics,and Ag has significant correlation elements Au,Cu,Pb,Zn,As,Sb,W,Ag content of elements is the main source of F1 factor As,Ag,Pb,Au,Zn,Sb element combination,is the main ore-forming elements combination,As,Sb element combination is a typical low temperature elements,they were placed in the same combination as the medium temperature elements of Pb,Zn,Ag and Au,explain Dongjianian silver deposit has many times characteristics,ore-forming process secondary source is F2,F4 factor. Finally,9 elements such as As,Sb,Ag,Au,Cu,Pb,Zn,Co and Mo were determined indicator elements. Among them,As and Sb are indicators of leading edge halo,Ag,Au,Cu,Pb and Zn are indicators of near-ore halo,and Co and Mo are indicators of tail halo. The primary halo axial zoning sequence of the main orebody from top to bottom determined by the zoning index is Co-Mo -Cu-Au-Sb-Zn-Pb-Ag-As,showing the phenomenon of “opposite direction zoning”.Combined with the change characteristics of primary halo geochemical parameters,the study on the denudation degree of orebody and the ideal model,it is predicted that the M1-I main orebody still has a large extension to the depth. The research results can be used as a reference for the research and decision of the deep trend of the same type of mineralized geological body in the region.

Cite this article

Qichao DUAN , Xucheng PANG , Rui ZONG , Di HAN , Yan ZHANG , Xin ZHANG . Primary Halo Characteristics and Geological Significance of the Dongjianian Silver Deposit in Lingbao City,Henan Province[J]. Gold Science and Technology, 2020 , 28(4) : 497 -508 . DOI: 10.11872/j.issn.1005-2518.2020.04.066

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