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大尹格庄金矿床位于招平断裂带中段,金矿体主要赋存于招平断裂主裂面下盘的黄铁绢英岩化碎裂岩和黄铁绢英岩化花岗岩中。岩、矿石主成分分析显示:胶东群变质岩与煌斑岩成分均与玄武岩的相似,大尹格庄矿区煌斑岩与焦家矿区和玲珑矿区煌斑岩在化学成分上差异明显。绢英岩化蚀变过程中,显著带入Si和K,而Na、Ca和Mg等组分带出明显。稀土元素分析显示:黄铁绢英岩化蚀变和金成矿过程中显著带出稀土元素,胶东群变质岩的原岩与拉斑玄武岩有关,而煌斑岩及其他样品的初始物源又与胶东群变质岩有关。微量元素分析显示:Au、Ag、Cu、Pb、As、Mo、Bi、Rb和Sr等元素在金矿体及黄铁绢英岩化蚀变岩中呈聚集趋势,但Au元素的聚集与Cu、As、Pb、Zn、Hg和Ag等元素的聚集不同步。大尹格庄金矿的形成与燕山期构造运动和岩浆活动关系密切,并受到断裂构造系统、胶东群变质岩、玲珑花岗岩及伴生岩脉等条件的复合制约,长期大规模热液对流循环及所伴随的动态开放条件下的水岩反应和物质运动是大尹格庄金矿成矿的关键。
The Dayingezhuang gold deposit is located in the middle part of the Zhaping fault zone, and the gold ore body mainly occurs in pyrites and yellow-iron-siliceous-hosted granitic rocks in the lower plate of the main section of the Zhaoping fault. The principal component analysis of rock and ore shows that the composition of Jiaodong Group metamorphic rocks and lamprophyres are similar to that of basalt. The chemical composition of lamprophyre in Dayingezhuang orefield and lamprophyre in Jiaojia mining area and Linglong mining area are obviously different. In the process of sericite alteration, Si and K are obviously brought in, while components such as Na, Ca and Mg are brought out obviously. The analysis of REE shows that REE is obviously brought out during pyritization alteration and gold mineralization process of yellow iron, the original rock of Jiaodong group metamorphic rock is related to tholeiite basalts, and the origin of lamprophyre and other samples is related with Jiaodong group Metamorphic rocks related. The trace element analysis shows that the elements Au, Ag, Cu, Pb, As, Mo, Bi, Rb and Sr are aggregated in gold ore bodies and pyroxenite alteration rocks. However, the accumulation of Au and Cu, As , Pb, Zn, Hg and Ag elements such as the aggregation is not synchronized. The formation of the Dayingezhuang gold deposit is closely related to the Yanshanian tectonic movement and magmatism. It is subject to compound constraints such as fault tectonics, Jiaodong Group metamorphic rocks, Linglong granite and associated dikes, long-term large-scale hydrothermal convection cycles and The water-rock reaction and material movement under the dynamic open conditions are the key to the mineralization of Dayingezhuang gold deposit.