摘要
与金成矿有关的中生界火山岩(J_3)广泛出露在延边北部地区,这套钙碱性系列的岩石由玄武安山岩—安山岩—石英安山岩等组成。这套岩系以富含Au、Ag、Sb、As、Bi为特点。金矿床可分为两种类型:1.蚀变岩型高温热液金矿床;2.低温热液石英—方解石脉型金银矿床。依据氢、氧、硫同位素和微量元素资料均表明成矿热液主要来自火山岩浆。
The mesozoic volcanic rock-series (J3) related closely to gold are exposed widely in the north yanbian area.The calc-alkalic rock-series consist of basaltic andesite-andesite-quartz andesite. The rock-series are characterized by higher abundance of Au, Ag, Sb As amd Bi. Gold deposits can be divided into two types:
1. Volcanic hydrothermal gold deposit formed in high temperature, the auriferous lode is alter rock type;
2. Volcanic hydrothermal gold-silver deposit formed in low temperature, the auriferous lode is quartz-calcite vein type.
The hydrothermals mainly come from volcanic magma according to data indicated by the δH,δO18, δS84 and trace elements.
出处
《黄金》
CAS
北大核心
1991年第7期6-12,共7页
Gold
关键词
火山岩
金矿床
地球化学
成矿作用
volcanic hydrothermal solution
metallization
coefficient of concentration
