摘要
金山剪切带型金矿床主要发育含金硅质糜棱岩和合金石英脉两类矿石，它们分别在矿化第一和第二阶段形成。含金硅质糜棱岩与围岩一双桥山群上亚群具有一致的稀土和微量元素分布特征及相近的元素比值，后者为矿床第一阶段矿化的形成提供了物质来源。含金石英脉中流体包裹体的化学和同位素组成特征表明，矿化第二阶段的成矿流体为源于大气降水的地下热水，引起自然金沉淀的因素主要是流体的相分离。
The Jinshan shear zone-hosted gold deposit mainly consists of two types of ores, the auriferous siliceous mylonite type and the auriferous quartz vein type.They were formed in the first and the second stages of mineralization, respectively.The auriferous siliceous mylonite is similar in geochemical characteristics of REE and trace elements to the country rock, which may have provided ore-forming matrials for the first stage of mineralization. The chemical and isotopic characteristics of the fluid inclusions from the auriferous quartz veins indicate that the oreforming fluid responsible for the second stage of mineralization came from meteoric water, and the main factor to cause gold precipitation is the phase separation of fluid.
出处
《地球化学》
CAS
CSCD
北大核心
1994年第3期226-234,共9页
Geochimica
基金
国家自然科学基金
关键词
金矿床
地球化学
成矿机制
矿石
shear zone
gold deposit
geochemistry
two-stage mineralization mechanism
Jiangxi
