摘要
辽南地区是我国重要的金矿化集中区 ,区内产出大、中、小型金矿 2 0余处。简要叙述了猫岭、五龙、四道沟、岫岩、新房 5个金矿床的地质概况。讨论了它们的铅同位素组成并划分为两大类 :第一类具有正常铅的同位素组成 ,其成矿年龄与辽河群变质年龄相当 ;第二类具有异常铅的同位素组成。在铅构造模式图上 ,上述 5个金矿床铅同位素组成具有壳源铅的特点。
Southern Liaoning is a main gold metallogenic concentration area in China. There are more than twenty large, middle, small scale gold deposits in this area. Five gold deposits, named Wulong, Sidaogou, Maoling, Xiouyan and Xinfang, have been briefly introduced. On the basis of general geological setting of above five gold deposits, the lead isotopic compositions have been discussed and divided into two types. The first typical gold deposit (such as Maoling) has normal lead isotopic compositions. The mineralization model age is metamorphosed age of Liaohe group. The second of gold deposits has anomal lead isotopic feature. The lead isotopic compositions of above five gold deposits in Pb Pb structural model diagram are close to the upper lower crust evolution line. These show the lead isotopic features of shallow sources about five gold deposits.
出处
《黄金地质》
2000年第3期52-56,共5页
Gold Geology
关键词
金矿床
铅同位素
辽南
gold deposit
lead isotopic composition
south of Liaoning
