R-factor Analysis and Its Geological Significance of Trace Elements in Guanfang Copper Deposit,Western Yunnan Province
Guanfang copper deposit,located in the north of the South Lancangjiang volcanic section of the famous Sanjiang metallogenic belt in China,belonging to Yunxian-Jinggu(volcanic arc)copper polymetallic metallogenic belt.It is the most representative basalt copper deposit in this area with medium-sized reserves.In this paper,33 kinds of trace elements in different middle ores in the mining area are analyzed by cluster analysis and R-factor analysis.The results show that 33 kinds of trace elements can be divided into basic rock element assemblage,medium-low temperature mineralization element assemblage,intermediate-acid rock related element assemblage and medium-high temperature mineralization element assemblage.Four element combination factors of F1,F2,F3 and F4 are obtained by R-factor analysis.Among them,the element classification results of cluster analysis and R-factor analysis are basically the same,which can represent the metallogenic process of the deposit,that is,the mineralization can be divided into two stages:hydrothermal mineralization and hydrothermal reconstruction of medium-low temperature groundwater.The ore-forming fluid mainly comes from the depth.The ore-forming materials have the characteristics of crust-mantle mixed sources.The deposit is a shallow meso-cryogenic hydrothermal deposit which is obviously related to concealed rock bodies and magmatism.
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