摘要
将冀东三家地区太古宙变质岩系分为上壳岩、长英质片麻岩和花岗岩三类,并对各岩类的地质地球化学特征及演化进行了阐述。上壳岩形成于具岛弧基性火山喷发的大陆边缘环境。长英质片麻岩的原岩为TTG系列的岩石,其上普遍叠加有以糜棱岩为主的韧性剪切带。花岗岩类(紫苏花岗岩)的地质地球化学特征可与迁安紫苏花岗岩对比。
The Archeozoic metamorphic rocks in Sanjia, eastern Hebei are dividedinto supracrustal rocks, felsic gneisses and granitoids. The characteristics ofthese rocks are discussed Supracrustal rocks were formed on the continentalmargin where there were existed arc-basic volcanic eruptions. The originalrocks of felsic gneiss are of the TTG sequence. The hypersthene-granite inthis area can be compared with that in Qian'an County.
关键词
太古宙
变质岩
河北
Archean
metamorphic rocks
Hebei
