摘要
本文主要探讨新疆阿尔泰地区多拉纳萨依、萨尔布拉克和赛都等成型金矿床的包体物理特征和化学成分．并对其成矿温压场、盐度、密度、逸度、pH值、Eh值、还原参数和矿化度作了研究；从金元素地化特征、黄铁矿特征、包体成份及氢氧同位素等方面．阐述了成矿物质来源，从而得出金矿具多期次、多来源和多成因的认识。并讨论了金的活化、迁移和沉淀。
The active continent margin which formed after Jungger plate undergoing to the Sibehan plate was called Ertix tectonic-mapmatic metailogenic province and divided into five metallogenic zones. The ore-forming temperature was from 160℃ to 320℃, pressure from 7. 34 to 70. 30 Mpa, the salinities of ore-forming solutions are about 5~ 10 eq. wt %Nacl, densities are 0. 720 ~0. 970 g/cm3, fo2 is 10-25 ~ 10-59, fS2' is 10-17.s ~ 10-6.0, reducing parameters are 0. 17~ 17. 02. As a result the gold deposits in the Altai area were formed in middle to lower temperatare, small depth, lower pressure, lower salinity and basidty reduction envitonments.The gold in the wall rocks is active, Its vartability coefficient is high,the abilities of activity, movement and richment are strong, the poor-rich belts of gold existed ftequently. It is suggested that the metallogenic elements came mainly from phyllite and there are a lot of Ca in the ore-forming fluids after studying the characteristics of gold-bearing prrites in different types of rocks in the Duolanasayi gold deposit. The features of H, O isotope in inclusions of quartz suggest that the ore-forming liquids are derived from Various sources, but mostly from atmospheric water in main metallogenic stage.The gold in rocks was activated by strong oxidizing agent such as carbon, sulphur to move as the troes of Au[HCO3],Na[Au (SO4)2],Na[Au (S2O3)]and mineraltrid by replacing some rocks selectively.
出处
《火山地质与矿产》
1995年第1期19-34,共16页
Volcanology & Mineral Resources
关键词
金矿床
阿尔泰地区
岩金矿
成矿机理
metallogenic mechanism, gold deposit, Altai, Xinjiang
