摘要
萝卜山铅锌矿床位于三江成矿带南段的思茅盆地,在该盆地沉积岩容矿的铅锌矿床中具有典型代表性。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和形成机制。结果表明,矿床δ34S值在-8.83‰~1.61‰之间,与典型幔源硫（-3‰~3‰）特征不同,与区域上海相蒸发岩的硫同位素组成（15‰~25‰）也不同。萝卜山铅锌矿床成矿流体中的硫可能主要来源于海水硫酸盐,形成机制为细菌还原（BSR）。
Luoboshan Pb-Zn Deposit, a typical Pb-Zn deposit in Lanping-Simao Basin, is located in the southern section of Sanjiang area. In this paper, we studied the source and formation mechanism of sulfur in the ore-forming fluids. Results show that the δ34S values of studied sulfide minerals are concentrated in the range from-8.83‰ to 1.61‰, which are different from those of the typical mantle-derived sulfur（-3‰ to 3‰） and the marine evaporates（15‰ to 25‰） in Simao Basin, but are similar to those of biological origin sulfur. Therefore, the sulfur in the ore-forming fluids of Luoboshan Pb-Zn deposit may be mainly derived from the seawater sulfate, and the formation mechanism is the bacterial reduction（BSR）.
出处
《矿物学报》
CAS
CSCD
北大核心
2015年第4期453-456,共4页
Acta Mineralogica Sinica
基金
国家自然科学基金项目(批准号:41163001)
