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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (6): 31-42.doi: 10.11872/j.issn.1005-2518.2017.06.031

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Occurrence of Gold and Silver and Their Relation to Metallogenic Evolution in Kangjiawan Au-Ag Polymetallic Deposit，Hunan Province

ZHENG Muting1，ZHANG Shugen1，HE Zhongchun2   

  1. 1.School of Geosciences and Info-physics Central South University，Changsha    410083，Hunan，China；
    2.Geological Exploration Bureau for Non-ferrous Metals，Hengyang    421009，Hunan，China
  • Received:2017-07-11 Revised:2017-08-24 Online:2017-12-30 Published:2018-05-18

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Abstract:

As a representative of Shuikoushan lead-zinc polymetallic orefield，Au-Ag polymetallic deposit in Kangjiawan is characterized by Au-Ag ores concentrated.Analysis of how Au and Ag are reserved and how they are related to evolution of mineralization is conducted，by using petrographic microscope and EMPA.Three mineralization processes are figured out，which are，formed by hydrothermal solution，Arsenopyrite-pyrite-quartz stage，zinc-lead sulfide stage，and quartz-calcite，respectively.Concentration of Au and Ag occurred at the zinc-lead sulfide stage.Au exist independently as a form of Au-Ag ores，except some of which enter the crystal lattices of iron pyrite and galenite by isomorphism and few of which exist in the form of Au-Ag-Te ores.Ag mainly exists in the form of Ag-Cu-Zn-Fe-Sb-As-S ores，in addition there are Ag-Sb-S series and Ag-Cu-Sb-As-S series of minerals.

Key words:  mineralization enrichment of Au and Ag, metallogenic evolution, EPMA, mineralography, Kangjiawan polymetallic deposit, Hunan Province

CLC Number: 

  • P618.51 

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