Geochemistry of main types of gold deposits in shear zones, China

被引:0
|
作者
Wu Xueyi
Yang Yuangen
Xiao Huayun
Wu Huiming
机构
[1] Chinese Academy of Sciences,Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry
来源
Chinese Journal of Geochemistry | 1999年 / 18卷 / 2期
关键词
shear zone; types of gold ore deposits; geochemical characteristics;
D O I
10.1007/BF02873936
中图分类号
学科分类号
摘要
Shear zone-hosted gold deposits in China can be divided into four types: ductile, brittle-ductile, ductile-brittle and brittle, of which the ductile and brittle types are the basic ones. All these types of gold deposits have their own geochemical characteristics. The Hetai gold deposit in Guangdong Province, for example, is a mylonite-type gold deposit in a ductile shear zone. With increasing mylonitization, obvious changes took place in trace elements in minerals and rocks, enriching gold and mineralizing elements. The S and Pb isotope data indicated that the ore-forming materials were derived from the strata. Hydrogen and oxygen isotopic and fluid inclusion studies also implied that the ore-forming fluid was much closer to meteoric water from the early to the late ore-forming stage. The Linglong gold deposit, Shangdong Province, is a quartz-type gold deposit in a brittle shear zone. Changes in rocks, minerals and trace elements occurred in the process of formation of gold quartz veins, and the analytical results of S, Pb, H and O isotopes showed that ore deposition is connected not only with the Jiaodong Group, but also with anatexic granites.
引用
收藏
页码:150 / 162
页数:12
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