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本文研究了韩国14个金-银矿床硫化物矿物硫同位素比值。尽管这些矿床的δ~(34)S(CDT)显示了—0.2‰～+9.8‰的一个相对较宽的范围,但是90％的δ~(34)S值落在1‰～7‰范围内。单个矿床的硫同位素值的变化范围通常小于3‰。这样小的偏差范围和观察到的硫化物矿物之间的分馏作用表明了它们的沉淀主要来自平衡或近于平衡条件下的H_2S。 连同从以前资料中获得的数据,得出了不同地质环境、形成时代和有用金属组分的矿床之间δ~(34)S值呈有规律的空间变化。位于或邻近Gyeonggi地块Mugug地区的矿床具有相对较高的δ~(34)S值的矿石硫;而在Ryeongnam地块的矿床倾向于具有相对较低的δ~(34)S值的矿石硫,尽管还存在一些例外。很可能这些矿床的矿石硫主要来源于各自区域内占主要的母岩,也是Gyeonggi地块和Ryeongnam地块之间的地球化学特征有些区别的结果。
In this paper, the sulphide mineral sulfur isotope ratios of 14 gold-silver deposits in Korea were studied. Although the δ ~ (34) S (CDT) of these deposits show a relatively wide range of -0.2 ‰ ~ + 9.8 ‰, the 90% δ ~ (34) S values fall within the range of 1 ‰ ~ 7 ‰ . Sulfur isotope values for a single deposit generally range from less than 3 ‰. Such a small range of deviations and the observed fractionation between sulphide minerals suggest that their precipitation is predominantly from H 2 S at equilibrium or near equilibrium conditions. Together with the data obtained from the previous data, the δ ~ (34) S values of deposits with different geologic environments, forming age and useful metal components show a regular spatial variation. Deposits located in or near the Mugug area of the Gyeonggi Plot have relatively high sulfur ore values of δ ~ (34) S; deposits in the Ryeongnam Plot tend to have relatively low sulfur ore values of δ ~ (34) S , Although there are some exceptions. It is likely that the ore sulfur in these deposits is mainly derived from the dominant parent rock in their respective area and as a result of some differences in the geochemical characteristics between the Gyeonggi and Ryeongnam plots.