山东沂南金矿床地质特征及控矿构造分析

The Geological Features and Control Structure of the Yinan gold deposits in Shandong Province

沂南金矿床位于华北板块东南缘,区内构造—岩浆活动的强烈,为有色金属、贵金属的活化、迁移、富集提供了热能和物源。本文以沂南金矿床为研究对象,认为沂南金矿床受燕山期中酸性杂岩体、含钙质地层以及构造蚀变共同控制,北西向断裂与北东向和北东东向断裂交汇部位控制了燕山期中酸性杂岩体的展布形态以及分布规律,穹隆构造形成的矽卡岩带、层间破碎带、滑脱带等均是良好的储矿空间。

The Yinan gold deposits in the North China plate,the strong tectonic-magma activity in the region,provides heat and material sources for the activation,migration and enrichment of non-ferrous metals and precious metals.In this paper,taking the mining deposit in Yinan as the research object,it is concluded that the gold deposit in Yinan is controlled by the acidic mesothelial body,the calcium-containing texture layer and the tectonic erosion in yanshan period,and the northwest-to-north-to-north and north-east-east-to-east fracture junction stakes control the pattern and distribution law of the acidic mesothelis in Yanshan,and the formation of the yanka rock belt,the interlayer break belt,the formation of the dome structure.Slip-off zone,etc.are good storage space.