大兴安岭银矿床地质地球化学特征及成矿规律  

The geological geochemistry and mineralizing regularity of the silver deposits in the greater Xing′an Mountain area

作　　者：潘军[1] 段国正[1] 郝立波[1] 李殿超[1] 吕志成[1] 

机构地区：[1]长春科技大学

出　　处：《黄金》2000年第7期1-4,共4页Gold

基　　金：教育部博士点基金项目!(编号:97018701)资助

摘　　要：根据大兴安岭地区银矿床特征、成矿条件和元素组合将该区银矿床分为三个类型 :矽卡岩型银矿床、斑岩型银矿床和热液脉状银矿床。并根据银矿化和中生代岩浆-构造活动的关系 ,将银矿床分为四个成矿系列。该区银矿化与中生代岩浆热液作用密切相关 ,银的成矿带受古生代火山 -沉积岩建造控制 ,矿田和矿床则受中生代断裂控制。这些矿床的氢、氧同位素数据表明成矿流体是热液流体和大气水的混合物。铅同位素2 0 7Pb/2 0 4 Pb和2 0 8Pb/2 0 4According to the deposit characteristics,mineralizing condition and element association,the silver deposits in the greater Xing′an Mountain Area are divided into skarn,porphyry and hydrothermal vein silver deposits.simultaneously,these silver deposits are also divided into four series on the basis of the relationship between silver mineralization and Mesozoic Era magmatectonic activity.The silver mineralization in this area has close relation with magmatic hydrothermalism of mesozoic Era and the silver mineralized belt is controlled by volcanosedimentary rock formation of palaeozoic Era while the ore field and depositfs are under the fault control of Masozoic Era.It indicates from the data of the isotopes of hydrogen and oxygen of these deposits that the mineralizing fluid is the mixture of hydrothermal fluid and atmospheric water.It also indicates from the values of isolopes 207 Pb/ 204 Pb and 208 Pb/ 204 Pb that the silver in the ore deposits may be the mixture of the substance from lower crust and top mantle.

关 键 词：银矿床 地球化学特征 成矿规律 

分 类 号：P618.520.1[天文地球—矿床学]