吉林延边地区火山岩型金矿床地球化学特点及成矿作用  

Geochemical characteristics of the volcanic gold deposits and metallization in Yanbian Prefecture, Jilin Province

作　　者：李鹤年[1] 杨刚宾[1] 

机构地区：[1]长春地质学院

出　　处：《黄金》1991年第7期6-12,共7页Gold

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.

关 键 词：火山岩 金矿床 地球化学 成矿作用 

分 类 号：P618.51[天文地球—矿床学]