黑龙江旁开门金银矿床构造期次及控矿分析

摘要

Pangkaimen gold-silver deposit located at Aihui-Huma metallogenic belt, and the ore body mainly hosted in volcanic rocks of the Ganhe formation of Jurassic.The ore body was formed with veins and distinctly controlled by fault structure.Many fault structures occurred in the study area, and were classified into five trending directions of NEE,NNE,NNW,NWW and NS.There are mainly four tectonic epochs in the study area and the tectonic directions are NEE,NNE,NNW and NWW in time order.The fault structure in NEE direction showed inherited activities,and provided a great channel for Yanshanian volcanic eruptions and deep ore-bearing hydrothermal.The extrusion fracture in NNE direction controlled the distribution of the mineralized belt in the study area.The tenso faults in NNW provided large space for precipitation and enrichment of ore-bearing hydrothermal.%旁开门金（银）矿床处于爱辉-呼玛成矿带，矿床主体赋存于侏罗系甘河组火山岩中，矿体主要以脉状形式产出，受断裂控制。区内断裂按展布方向可划分为5组，即NEE、NNE、NNW、NWW及SN向；区内主要存在4个期次构造运动，从早到晚形成的先后顺序为NEE、NNE、NNW和NWW向构造。其中，NEE向构造具长期继承性活动特征，为燕山期火山多次喷发和深部含矿热液提供了良好的通道；NNE向压扭性断裂控制着研究区内矿化带的分布；NNW向张扭性裂隙为成矿热液沉淀富集提供良好的容矿空间。