| 我国主要汞矿床的辰砂硫同位素组成 |
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| 引用本文：.1992.Sulfur Isotoplc Composition Of Cinnabar From Major Mercury Deposits Of China[J].Mineral Deposits,11(3):213~220 |
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| 中文摘要:汞矿是我国重要有色金属矿产之一，和世界相比，有其独特之处。据26个汞矿床(点)229件辰砂硫同位素测定值统计，绝大部分辰砂的占d34S都是正值，且与含矿地层中硫酸盐d34S的差值，大致有一个确定的变化范围。畏砂的d34S比含矿地层中硫酸盐的d34S平均低9.35‰，从时间的总体上看，各时代地层中辰砂的d34S变化曲线与海洋硫酸盐的d34S时间变他曲线，几乎具有相同的演化趋势。然而，在一般情况下，辰砂中的硫都是来自含矿地层中的海洋硫酸盐。 |
| 中文关键词:汞矿床 辰砂 硫同位素 海洋硫酸盐 |
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| Sulfur Isotoplc Composition Of Cinnabar From Major Mercury Deposits Of China |
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| Abstract:Mercury deposits in China, being one of the important metallic ore resources of the country, have their unique characteristics as compared with mercury deposits in other parts of the world. China’s mercury deposits mainly have Paleozoic marine carbonate rock as the ore-bearing wall rock, their metallogenic epochs are Mesozoic and Cenozoic, and they are dominantly of hydrothermal type. Mercury deposits in carbonate rocks are intimately associated with sedimentary facies, and occur mainly in dolomite and limestone of evaporation facies-supratidal salar facies and frontal slope facies of the carbonate platform, with the deposits in the former facies related to anhydrite and those in the latter facies related to organic matters. According to sulfur isotopic determinations of 229 cinnabar samples from 26 mercury deposits (spots) in 7 systems, 13 groups and 18 formations, cinnabar from the overwhelming majority of ore deposits has positive 34S values. 34S values of cinnabar from strata of the same age in various places vary limitedly, generally not in excess of 10‰. 34S mean values of cinnabar from various strata are 3.8‰~14.4‰(averagely 9.35‰)lower than mean 34S values of oceanic sulfates in ore-bearing strata; that is to say, their differences are within a comparatively definite range. Viewed from the general temporal evolution, 34S variation curves of cinnabar from strata of various ages almost exhibit the same evolutionary trend as ?34S temporal variation curves of oceanic sulfates compiled by G. E. Claypool et a1. (1980). It is thus considered that, for the mercruy deposit in marine sedimentary rocks, sulfur in cinnabar came exclusively from oceanic sulfates of the strata where the ore deposit lies. |
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