胶东金矿集中区大规模成矿的原因分析

全面收集了胶东矿集区矿床和相关岩石的同位素年龄,对该区大规模成矿的原因进行了系统分析。数据显示胶东金矿大规模成矿作用的高峰为110~130Ma,成矿作用同步或略滞后于中生代花岗岩的形成时间。郯庐断裂带是华北地区最主要的断裂带,并且在110~150Ma期间平移活动最显著,因此郯庐断裂带的活动对该区金矿的大规模形成起到非常重要的作用。综合上述观点,胶东金矿集中区大规模成矿是多种因素耦合的结果。

Origin Analysis on Large Scale Mineralization in Gold Concentrated Deposits in Jiaodong Area

On the basis of collecting isotopic ages of ore deposit and associated rock in Jiaodong area, origin of large scale mineralization system in this area has been analyzed comprehensively. It is showed that the peak of gold mineralization in Jiaodong area is 110~130Ma, and mineralization is synchronous or slightly lags behind the formation time of the Mesozoic granites. Tanlu fault belt is a major fault zones in North China, and translational activity is the most significant in 110~150Ma. Thus, the activity of Tanlu fault zone play a very important role in forming large scale gold deposits.Jiaodong gold mineralization concentrated area is the result of many factors.