Mineralization Characteristics and Genesis of Huangchengshan Silver Deposit in Luoshan County, Henan Province
详细信息
- 责任者：Ren Aiqin (No.3 Institute of Geological and Mineral Resources Survey of Henan Province ; Xinyang 464000 ; China)
- 刊名：Geology and Mineral Resources of South China
- 出版年：2013
- 卷期：29(3)
- 关键词：银矿 ; silver ores ; 河南 ; Henan Province
- 页码：p.217-226
- 图表：3 illus., 2 plates, 6 tables, 11 refs.
- 分类号：1001
- issnNo：ISSN1007-3701
- isbnNo：CN42-1417/P
摘要
The mineralization of Huangchengshan silver deposit experienced hydrothermal and supergenetic oxidation period.The hydrothermal stage had gone through three mineralization stages: the pyrite-quartzite stage polymetallic sulphides-quartzite stage and brecciation stage.The main mineralization stage is polymetallic sulphides-quartzite stage.Hydrothermalism showed that early quartz dissolved in alkaline hydrothermal process and precipitated with metal sulfides.With the following of decreased temperature and circulating groundwater,finally,SiO2 precipitated because of super-saturation.It has low temperature and low salinity in acidic environment for ore-forming physicochemical conditions;the degree of mineralization is proportional to acidity of volcanics.The deposit has alteration zoning centered in strong silicification outward with development of advanced muddy zone(kaolinite and quartz) and muddy zone(montmorillonite and quartz).It is limited to the the alteration zoning of strong silicification that middle silicification related to the mineralization of silver and polymetallic sulphides.It can be judged that Huangchengshan silver deposit has the typical high-sulfur characteristics of epithermal deposits,which is a high sulfur epithermal deposit,from the combination,typomorphic characteristics and fabric of the ore minerals and deposit alteration zoning characteristics.
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