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焦家式金矿,又称之为破碎带蚀变岩型金矿,是近几年在胶东半岛发现的一个新类型金矿床.由于它的规模大,矿化稳定、集中,探采条件好,引起地质工作者的普遍重视.作者就焦家式金矿成矿地质条件作一初步分析,旨在促使这方面的讨论. 地质环境焦家式金矿位于郯城-庐江断裂(山东境内称沂沭断裂)的东侧(图1),属新华夏系第二隆起带——胶东隆起区.区内最老地层为太古代胶东群,自下而上分为:①蓬夼组,岩石以黑云
Jiaojia Gold Mine, also known as the crustal alteration rock type gold deposit, is a new type of gold deposit discovered in the Jiaodong Peninsula in recent years. Because of its large scale, stable mineralization, centralized exploration and mining conditions , Aroused the universal attention of geologists.The authors make a preliminary analysis on the geologic conditions of the Jiaojia gold deposit in order to promote the discussion in this area.Jiaojia gold deposit of the geological environment is located in the Yuncheng-Lujiang fault (Figure 1), belongs to the second uplifted belt of the Neo-Huaxia Moutain - Jiaodong Uplift.The oldest strata in the area is the Archean Jiaodong Group, which is divided into the following categories: Black cloud