冀东青龙河太古宙花岗岩绿岩带地质特征  

THE GEOLOGICAL FEATURES OF GRANITE GREENSTONE BELTS IN QINGLONG RIVER, JIDONG

作　　者：齐鸿烈[1] 郝兴华[1] 张晓冬 聂卫东[1] 

机构地区：[1]河北省地勘局秦皇岛矿产水文工程地质大队,秦皇岛066001

出　　处：《前寒武纪研究进展》1999年第4期1-17,共17页Progress in Precambrian Research

摘　　要：青龙河花岗岩 绿岩带形成于新太古代晚期 ,形成环境为古岛弧环境 ,绿岩地体由双山子群、朱杖子群组成。区内褶皱构造、韧性剪切变形带及脆性断裂带十分发育。绿岩地体的形成时间为 2 6 50～ 2 750Ma。花岗质岩石即“TTG”岩系安子岭片麻岩套 ,由四个深成侵入体组成 ,其中柳各庄片麻岩单元直接侵入双山子群鲁杖子组。柳各庄片麻岩多件锆石U Pb一致线年龄数据在 2 510～ 2 550Ma之间。Qing Long River granite greenstone belts formed in the Neoarchean Era. It made from the environment of the Paleo island arcs. This granite greenstone terrains(GGT) is composed with the Shuangshanzi Group and the Zhuzhangzi Group. Folds, ductile faults and brittle faults are all extremely plentiful in the GGT, formed in the interval 2 650～2 750 Ma, about in late Neoarchean. Granitold rocks, named TTG series, is made up of Anziling gneissic guites, including four plutonic intrusions. Among them, Liugezhuang gneissic rocks intruded directly in Luzhangzi formation of Shuangshansi Group. Several zircon U Pb isotopic ages are collected from Liugezhuang Gneissic rocks. These ages separately are 2 501 Ma, 2 515 Ma, 2 525 Ma, 2 528 Ma, 2 532 Ma, 2 554 Ma etc.

关 键 词：花岗岩-绿岩带 片麻岩 新太古代 地质特征 

分 类 号：P583[天文地球—岩石学] P534.2[天文地球—地质学]