吉林通化复兴村金矿床地质、地球化学特征及成因机制探析

GEOLOGY,GEOCHEMISTRY AND GENESIS OF THE FUXINGCUN GOLD DEPOSIT IN TONGHUA,JILIN PROVINCE

通过对复兴村金矿床的地质和地球化学特征分析研究,发现元古宇老岭群大栗子组和珍珠门组是重要的含金矿源层,也是主要的容矿围岩.区内的NNE、NW向断裂破碎带是重要的的控矿构造.断裂破碎带内分布的硅化、黄铁矿化、毒砂化是金矿重要的找矿标志,并存在后期氧化富集带.燕山期花岗岩作用区,特别是闪长岩脉与矿体相伴处是是富金矿(化)体.相关的成因机制分析表明,复兴村金矿床在成因类型上为与燕山期构造岩浆活动有关的多因复成的中低温热液金矿床.

Based on analysis of the geological and geochemical characteristics of Fuxingcun gold deposit in Tonghua,Jilin Province,it is found that the Dalizi formation and Zhenzhumen formation of Proterozoic Laoling group are important source layers for gold and the main host rocks as well.The NNE-and NW-trending fault zones are major ore-controlling structure,with silicification,pyritization and arsenopyritization along the fractures as significant prospecting indicators for gold deposit.There are also oxidation belts of late stages in the fault zones.The active areas of Yanshanian granite,especially wherewith diorite dykes and orebodies,are gold rich ore （mineralization） bodies.The analysis on genetic mechanism shows that the Fuxingcun gold deposit is a polygenetic epi-mesothermal deposit related with Yanshanian tectonomagmatic activities.