摘要
筲箕湾铅锌矿床是近年在川-滇-黔铅锌成矿域黔西北铅锌成矿区垭都—蟒硐成矿带发现的中型矿床,有关其地质、地球化学研究前人极少涉及,严重制约了成矿机制和成矿预测研究。本次工作对该矿床原生矿体主要矿石矿物(黄铁矿、方铅矿和闪锌矿)进行了硫同位素组成分析,探讨了成矿流体中硫的来源。结果表明,矿床δ34S值集中在10‰～12‰之间,不同于δ34S值在0‰附近的幔源硫,与区域各时代碳酸盐岩地层中石膏、重晶石等硫酸盐矿物的δ34S值(约15‰)相近,认为成矿流体中的硫为区域各时代碳酸盐岩地层中膏盐层热化学还原作用(TSR)的产物。
The Shaojiwan Pb-Zn deposit of Guizhou Province, China, is a medium-sized deposit of the Yadu-Mangdong metallogenic belt in the Sichuan-Yunnan-Guizhou Pb-Zn mineralization district discovered in recent years. Pre- vious studies on geology and geochemistry of deposit were limited so that the mineral prediction and metallogenic mechanism were severely restricted. In this paper, we reported the sulfur isotope compositions of major ore minerals （Pyrite, sphalerite and galena） of primary ore body and discussed the source of ore-forming fluid. The result showed that values of ~34S were concentrated in the range from 13%o to 17%o, which were different from the mantle-derived sulfur which values are near 0%0 and were close to those of different time sulfates series such as gypsum and barite with the values of δ34S being about 15%o in the ore field. That suggests that sulfur in ore-forming mainly came from thermo-chemieal sulfate reduction （TSR） in gypsum-sah zone of different time carbonate formations in this area.
出处
《矿物学报》
CAS
CSCD
北大核心
2011年第3期496-501,共6页
Acta Mineralogica Sinica
基金
国家"973"计划项目(2007CB411402)
中国科学院重要方向项目(KZCX2-YW-Q04-05)
关键词
硫同位素
地球化学
筲箕湾铅锌矿床
中国黔西北
sulfur isotope
geochemistry
Shaojiwan Pb-Zn deposit
northwest Guizhou province
