摘要
八家子矿床的硫同位素组成的系统研究表明,矿体中硫化物δ^(34)S值为6.0～-8.2‰,在频率直方图上呈塔式分布,具有明显的时、空变化规律。矿区黑云母石英闪长岩中浸染状黄铁矿δ^(34)S值为1.9～-0.8‰,变化小。地层中浸染状、分散状和层纹状硫化物δ^(34)S值为13.0～-19.1‰,变化较大。根据矿床地质条件、矿物共生组合、成矿温度和硫同位素,进一步讨论了成矿溶液的化学条件和演化特征,认为矿床硫的来源可能是地层硫和岩浆硫的混合。
The sulfur isotope compositions of the Bajiazi ore deposit are studied in detail. The δ^(34)S values ofsulfide in orebodies are between 6.0 and -8.2 pet mil, showing a peak curve in histogram and hav-ing a horizontal and vertical zoning character. The δ^(34)S values of the disseminated pyrite in biotitequartz diorite are between -0.8 and 1.9 Per mil, varied a little. The δ^(34)S values of sulfide in sedi-mentary strata varied widely from -19.1 to 13.0 per mil. According to the geological background,mineral peagends, ore-forming temperature and δ^(34)S values, we further discussed the chemical fea-tures of ore-forming solution in different stages. The source of sulfur in orebodies is estimiated from amix of sedimentary rock sulfur and igneous rock sulfur.
出处
《地质找矿论丛》
CAS
CSCD
1991年第3期88-99,共12页
Contributions to Geology and Mineral Resources Research
