摘要
在对莲花山金矿床Ａｕ的成矿阶段划分的基础上，对与Ａｕ的主要成矿阶段密切相关的石英进行了流体包裹体的显微测温和气液相成分分析，结合其他分析结果和资料，确定出成矿流体的性质、盐度和密度；成矿过程的温度、压力、氧逸度和硫逸度以及成矿环境和ｐＨ、Ｅｈ值等Ａｕ的成矿物理化学条件。最后探讨了Ａｕ的活化、迁移和沉淀机理，认为导致本矿床Ａｕ的沉淀有两种机制，即沸腾去气机制和流体混合机制。
Microthermometry and compositional analysis are carried out on fluid inclusions hosted in quartz which is intimately associated with gold mineralization. The composition, sality and density of mineralizing fluids, the p-T conditon of fluid entrapment and other physico-chemical parameters such as pH, Eh, fo2 and fs2 are calculated based on the theory of fluid inclusion geochemistry. Finally, two kinds of mechanism are sugessted for the precipitation of gold. They are boiling-degassing and mixing of fluid.
出处
《地球化学》
CAS
CSCD
北大核心
1996年第1期73-83,共11页
Geochimica
关键词
金矿床
物理化学条件
液包体
gold deposit
fluid inclusion
physico-chemical condition
metallogenetic mechanism
Inner Mongolia
