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在平谷—兴隆地区中上元古界地层中发育有洞子沟、边墙沟、后干涧、银冶岭等银多金属矿床。其特点是 :产于中上元古界地层中 ,与中元古火山岩或火山角砾岩筒在空间和时间上有一定的联系。对其成因争论较多[1～ 3] ,本文试图从区域展布特点和矿床特征探讨其成因。 本区地处燕
In the Pinggu - Xinglong area of the Middle and Upper Proterozoic strata developed Dongzigou, Bianqian ditch, after Qianjian, Silver Ye Ling and other silver polymetallic deposits. Its characteristics are: produced in the Proterozoic stratigraphy, and the Middle Proterozoic volcanic rocks or volcanic breccia tube in space and time have a certain relationship. There are many controversies about its origin [1 ~ 3]. This paper attempts to explore the causes of regional distribution and deposit characteristics. The area is located Yan