摘要
1:5万区调填图中系统调研了江西省内都昌县马涧桥、波阳县燕窝一带新发现的青白口纪地层岩石组合与层序、岩相特征,获得部分微古植物化石及847±38Ma的同位素测年数据,重新厘定并新建马涧桥组,据其特征认为可与毗邻的皖南青白口纪地层对比。四堡运动后,本区与皖南都曾经历过裂陷时期,具有相同的构造背景。
Rock association, stratigraphic sequence and lithofacies features of the Qingbaikou stratadiscovered recently in Majianqiao of Duchang county and Yanwo of Boyang county have been systematically studied during a 1 : 50 000 regional geological mapping program Some micro- plant fossils and an isotopic age of 847 ± 48 Ma have been obtained A Majianqiao Formation comparable with the Qingbaikou strata in the adjacent Southern Anhui has been reestablished. Posterior to the Sibao Movement, the area and southern Anhui have both experienced the same rifting period and shared the same tectonic settings
关键词
地层
划分
对比
青白口纪
岩石组合
classification and correlation of strata, Qingbaikou Period , Majianqiao, Duchang county , Yanwo , Poyang county
