湖南康家湾金银多金属矿床金银赋存状态及其与成矿演化的关系

doi:10.11872/j.issn.1005-2518.2017.06.031

Abstract

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

ZHENG Muting，ZHANG Shugen，HE Zhongchun. Occurrence of Gold and Silver and Their Relation to Metallogenic Evolution in Kangjiawan Au-Ag Polymetallic Deposit，Hunan Province[J].Gold Science and Technology, 2017, 25(6): 31-42.

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

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