华北燕山期区域变质与内生成矿作用关系雏议

A Preliminary Discussion on the Relationship between Yanshanian Regional Metamorphism and Ore Deposit Genesis in North China

初步讨论了华北地区燕山期区域变质作用与内生成矿作用的关系。指出华北地区众多内生金属矿床产于绿片岩相岩石组合中,其中包括太古宙岩石的退变质、沉积盖层和中生代火山-侵入杂岩的进变质岩石。因此,这些矿床的形成与燕山期区域变质作用及其相应的韧性-韧脆性变形作用密切相关。

During Yanshanian （Jura-Cretaceous） tectonic event of North China, both of the Archean basement and sedimentary cover were involved in the regional metamorphism due to thrusting and magmatism. Many ore deposits in North China occurred in green-schist facies rock assemblage. It was suggested that the ore-bearing green-schist facies rock assemblages were mainly formed by Yanshanian regressive metamorphism of Archean rocks and prograde metamorphism of sedimentary cover rocks. Therefore, the origin of many ore deposits in North China was caused by the Yanshanian regional metamorphism and related ductile deformation.