论清源北部太古代地质几个基本问题

以岩石学与构造研究相结合为基础，宏观与微观观察为主，地球化学为辅的综合研究方法论证了本区太古代地质体由三套变质建造组成。其中花岗质岩石占７１％，原地深熔紫苏花岗岩为１１．８％，浅色麻粒岩是１．２％，浅粒岩、含砾麻粒岩质浅粒岩（底砾岩）３６．７％和原地深熔花岗岩２０％。高角闪岩相以浅位岩为主原地深熔花岗岩的原岩建造为类磨拉石建造系列，低角闪岩似绿岩建造的原岩建造为镁铁质泥灰岩粉砂岩型复理石建造。其地质体是由６１．２％的层状变质岩系和３１．８％的原地深熔花岗岩组成。根据各建造的地层缺生，底砾岩及低、高角闪岩相矿物共生组合区域性叠加和变辉绿岩群的分布规律，确定三套变质建造为不整合接触，据此提出新的划分方案并与华北地台北部太古界分布区作了对比，事实证明岩石地层学的方法，在太古代地质与成矿研究中仍是有效的。

SOME BASIC PROBLEM ON ARCHEAN GEOLOGY IN NORTH QINGYUAN COUNTY, LIAONING PROVINCE

Archean geological body in north Qingyuan county consisted three sets of metamor-phic formations:low-grade amphibolite facies greenstoneoid formation, which the primaryrock is mafic marl,siltstone-type flysch;high-grade amphibolite facies leucogranulitite au-tochthonous anatectic granite formation,which primary rock is a series of molasseoid forma-tion including feldspathic sandstone formation, molasseoid formation; granulite- chanockiteformation . According to their unconformity relation and statum order,the Archean rocks innorth Qingyuan can be divided into Qingyuan Group,Hunbei Group and Anshan Group,re-spectively being Lower-,Mid-,and Upper-Archean.