摘要
通过对金、银矿石矿物的硫同位素组成及前人大量资料的综合研究 ,系统讨论了金、银矿床δ3 4S的特征。在δ3 4S分布图上金矿δ3 4S的分布呈波浪式 ,说明硫源较复杂 ,银矿δ3 4S分布呈塔式 ,反映硫来源较单一。运用平克尼 -拉夫特法作Δ3 4S辉锑矿 -黄铁矿 和Δ3 4S闪锌矿 -方铅矿 对δ3 4SA 和δ3 4SB 关系图 ,分别得到金矿和银矿成矿热液δ3 4SΣS为 - 1 0‰～ +1 6‰和 +0 8‰～ +6 0‰ ,进一步证明金矿硫来源以深源硫和有机还原成因硫为主 ,银矿硫源为无机还原成因硫 ,揭示出金、银矿床成矿物质硫来源上的一定差异。
The gold deposit, situated near the surface and above the silver orebody, shows similar features of Carlin type ones in Nevada of the U.S, but the silver deposit is related to quartz veins rich in sphalerite and galena. Analyzing of sulfur isotope components shows that the δ 34 S values of pyrite and stibnite from the gold deposit have a wavy shape distribution in the δ 34 S diagram and those of sphalerite and galena from the silver deposit a tower shape distribution, which indicates that the source of sulfur is complicated for gold and simple for silver deposit. In the plots of Δ 34 S Stn Py and Δ 34 S Sp Gn to δ 34 S A and δ 34 S B(D.M.Pinckney and T.A.Rafter,1972), the total sulfur isotope components of hydrothermal fluid ( δ 34 S ΣS ) can be identified to be:-1.0‰～+1.6‰ for the gold and +0.8‰～+6.0‰ for the silver orebody, showing that the sources of sulfur are mainly resulted from organic reduction for gold and inorganic reduction origin for silver deposit. So, the hydrothermal fluids for gold mineralization are different from that for the silver mineralization.
出处
《华南地质与矿产》
CAS
2002年第1期17-22,共6页
Geology and Mineral Resources of South China
基金
国土资源部"云开地区重要成矿区带金银铜铅锌成矿地质背景及找矿靶区优选研究"项目 ( 95 -0 2 -0 7)
关键词
硫同位素
同位素分馏
热液总硫同位素
有机还原
无机还原
银矿床
金矿床
sulfur isotope
isotope fractionation
total sulfur isotope composition of hydrothermal fluid
organic reduction
inorganic reduction
gold and silver deposits
