胶东东部米山断裂变形带应力应变分析及其控矿特征研究

STRESS AND STRAIN OF THE MISHAN FAULT DEFORMATION BELT IN JIAODONG AND ITS ORE CONTROLLING CHARACTERISTICS

米山断裂是一多期变形的断裂。早期以韧性变形为主，后期以脆性变形为主，断裂变形具有准对称性，西盘变形强度大于东盘变形强度，变形强度决定了断裂带的蚀变及矿化特点。蚀变的分带结构与断裂的不同的矿化特征都与断裂的变形有关。因此，米山断裂的成生与发展，对胶东东部的成岩成矿具有重要作用，它控制了燕山早期花岗岩的侵入。韧性变形作用是金矿成矿的必要条件。

Mishan fault is considered as a multi period deformed fault with ductile deformation in early period and brittle deformation in later period.The fault deformation shows parasymmetry nature, intensity in the west wall being stronger than that in the east wall,which confines characteristics of alteration and mineralization zoning in the belt.The alteration zoning and different mineralization characters are all related to the deformation of the fault.There,the formation and development of the Mishan fault is very important for the rock forming proccess and mineralization in the eastern Jiaodong.They also controlled the granite emplacement in early Yenshan movement.The ductile deformation is enssential condition for gold mineralization.