摘要
研究了中国火山次火山岩—斑岩金银矿成矿系列的划分、成矿构造环境、矿床类型、成矿形式。该系列金银矿划分为 6个亚系列 :大陆边缘与高钾钙碱性英安—流纹岩有关的Ag—Au成矿亚系列 ;古生代岛弧区与富钠高碱玄武岩拉斑玄武岩有关的Au(Cu、Ni、Cr)成矿亚系列 ;陆内裂谷、裂陷区富碱高钠中基—中酸性火山岩有关的Au—Cu—Fe成矿亚系列 ;地槽褶皱带钙碱性安山—流纹质火山岩有关的Ag—Sn—Cu—Pb—Zn— (Au)成矿亚系列 ;中新生代岛弧一板块碰撞带碱性—亚碱性长英质斑岩型Au—Cu—Mo—Pb—Zn成矿亚系列 ;台缘高甲安山—流纹质火山岩有关的Au—Ag(Cu)成矿亚系列。将成矿系列划分出 7个成矿形式。
The importance is attached to the classification,tectonic settings,genetic type,metallogenic mode,association and superimposition of the Au-Ag polymetallic metallogenic series related to Volcano-subvolcanic-porphyry of China.According to tectonic settings,element association and volcanic-porphyry,it is divided into six subseries:Ag-Au subseries related to high-k calc-alkaline dacite-rhyolite of continental margin(I);Au(Cu,Ni,Cr) subseries related to Na-rich and high-alkaline basalt and tholeiite of paleozoic arc island(Ⅱ);Au-Cu-Fe subseries related to high-Na and alkaline-rich intermediate-basic or intermediate-acid volcanic rocks of intracontinental rift(Ⅲ);Ag-Sn-Cu-Pb-Zn-(Au)subseries related to calc-alkaline basaltic-rhyolitic volcanic rocks of geosyncline(Ⅳ);Au-Cu-Mo-Pb-Zn subseries related to alkaline-subalkaline felsic porphyry of Mesozoic or Cenozoic plate collision belt(Ⅴ);Au-Ag-(Cu) subseries related to high-K andesite-rhyolite volcanic rocks of platform margin(Ⅵ).Based on study of occurrence of deposits and relationship of ore bodies to caldera,edifice,subvolcanic vein and porphyritic stock etc.the mineralization for the metallogenic series is divided into seven modes:vein ores confined to crater or caldera;vein ores limited to subvolcanic rocks intruded in edifice,neck,pipe or root of volcanic rocks; veins hosted within breccia pipe and controlled by its swelling-striction configuration;veins hosted within fracture zone in breccia and tuff;veins or interstratified vein ores hosted in basement or sediment cover away from volcanic basin and near unconformity plane;disseminated or vein ores hosted within porphyry stock;and vein or lenticular ores in skarn.
出处
《地质与勘探》
CAS
CSCD
北大核心
2000年第3期1-4,共4页
Geology and Exploration
关键词
火山岩
次火山岩
金矿床
银矿床
成矿系列
Au-Ag deposits,metallogenic series,metallogenic mode,genetic type,tectonic settings
