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崤山太古宙花岗—绿岩地体由 15%的绿岩带 (变质表壳岩系 )和 85%的花岗质片麻岩系(变质侵入岩 )组成。呈包体产出的绿岩系分为以变火山岩为主的兰树沟岩组和以变沉积岩为主的杨寺沟岩组。花岗质片麻岩包括早期富钠的TTG质花岗岩和稍后的富钾花岗岩。晚期则有代表大陆地壳裂解的基性岩墙群侵入。文中介绍了各岩石单元的地质、地球化学特征及花岗—绿岩带的变形和变质特征 ,探讨了研究区太古宙的大陆地壳演化
The Archean Archean granite-greenstone terrane consists of 15% of greenstone belt (metamorphic crust) and 85% of granitic gneiss (metamorphic intrusive rock). The greenstone in the form of inclusions is divided into the Lanshugou Formation dominated by volcanic rocks and the Yangsigou Formation dominated by altered sedimentary rocks. The granitic gneisses include early sodium-rich TTG granites and later potassium-rich granites. In the late period, the basic dyke swarm, which represents the cracking of the continental crust, invaded. In this paper, the geological and geochemical characteristics of each unit of rock and the deformation and metamorphism of the granite-greenstone belt are introduced. The evolution of the continental crust in the Archean in the study area is also discussed