摘要
集安岩群出露在辽吉古元古代造山带内,但一直未获得典型洋壳资料。作者野外调研过程中,在其中的蚂蚁河岩组和大东岔岩组中发现大量超镁铁质—镁铁质岩块残存在不同类型的混杂基质之中,根据其空间上的展布特征,可以划分高台沟—矿山村—台上和头道—西江—甲乙两条蛇绿混杂岩带。这一发现填补了华北板块古元古代蛇绿岩研究空白,为吉林省在古元古代地层划分及其与辽东、胶东地层对比提供了重要资料,为华北板块早期地壳的洋陆转换研究提供了充分证据。
The Ji'an rock group was exposed in the Paleoproterozoic orogenic belt,Liaoning-Jilin Province,however,the typical oceanic crust data has not been obtained.During the field investigation,the authors found that a large number of ultramafic-mafic rocks remain in different types of hybrid matrices from the Mayihe Formation and Dadongcha Formation.According to their spatial distribution characteristics,they can be divide into two ophiolite melange belts:Gaotaigou-Kuangshancun-Taishang and Toudao-Xijiang-Jiayi.This discovery fills the research gap of the Paleoproterozoic ophiolitic rocks in the North China plate,which provides important data for the division of the Paleoproterozoic strata in Jilin Province and its comparison with the eastern Liaoning and Jiaodong Formations.It also provides sufficient evidence for the ocean-continent transition of the early crust in the North China Plate.
作者
周晓东
邸新
卢兴波
孔凡乾
ZHOU Xiao-dong;DI Xin;LU Xing-bo;KONG Fan-qian
出处
《吉林地质》
2018年第1期1-6,共6页
Jilin Geology
基金
中国地质调查局地质调查项目"吉林省区调片区总结与服务产品开发"(编号:12120113013300)
关键词
岩石学
蛇绿岩
集安岩群
吉林省南部
Petrology
ophiolite
Ji’an rock group
southern of Jilin Province
