河北峪耳崖金矿区花岗岩体的岩石学特征

Petrology Characteristics of Granites in Yuerya Mine of Hebei

研究了峪耳崖岩体、葫芦峪岩体、三道湾岩体的岩石学、矿物学、岩石化学、地球化学特征，它们在板块内Ａ型俯冲过程中，由老基底太古代迁西群的变质中基性火山沉积岩系（属下地壳）重熔形成，为下地壳重熔型花岗岩．这种成因的花岗岩在华北板块存在普遍性，主要表现出Ⅰ型岩石的特征，但随重熔形成的岩浆中变质沉积岩组分的增多，亦有一些Ｓ型岩石的特征出现．

The mineralogical, petrochemical characteristics and geochemical features of Yuerya batholith,Huluyu batholith and Sandaowan batholith in Eastern Hebei Province, are studied. The results show that they are all the partial remelting products of the Archean basement rocks Qianxi group,which is composed of metamorphic basic-intermediate volcano sedimentary rocks (belonging to the lower crust), between the Atype covergence in the plate.So the genetic type is the anatexis of the lower crust.We also point out the granite of this genetic type is important in the NorthChina plate. It mainly presents Ⅰtype characteristics. However with the increase of composition of metasedimentary rock in the formed magma,it also presents some Stype chracteristics.