摘要
黄金洞金矿床产于中元古界冷家溪群浊积岩建造中,为典型的浊积岩型金矿床。冷家溪群浊积岩建造初始富集金等成矿元素,为黄金洞金矿的形成提供了物质来源;矿床属于Au—As元素组合型金矿床,金主要与毒砂、黄铁矿和条带状石英等矿物相伴生;矿床形成于中偏高温、中压、较高氧逸度和PH值条件下;成矿流体为富含CO_2的Mg—ca—Na质含硫热水溶液,其主要源于变质热液;金呈Au—As—S型络合物迁移,在扩容带中沉淀富集成矿。
Huangjindong gold deposit is a typical turbitite gold deposit occurring in Proterozoic Lengjiaxi Group of turbitite formation. Lengjiaxi Group is initialy riehed in gold metallogenic elements which make a basis for the formation of Huangjindong gold deposit. Au is correlated with As and ore grade is controlled by the content of arsenopyrite, pyrite and stripped quartz. The ore is formed at 300°- 400℃ and about 1013×10~5pa with PH value of 5. 8—7. 2 and fo_2 of 10^(-25.8)—10^(29.5). The ore—forming fluid is the metamorphic Mg—Ca—Na hot sulfur—bearing fuid enriched with CO_2. Gold is transported as Au—As—S complexes and deposited in dilatant fractures.
出处
《地质找矿论丛》
CAS
CSCD
1991年第1期1-13,共13页
Contributions to Geology and Mineral Resources Research
基金
国家自然科学基金
