摘要
赣东北地区构造复杂 ,可以划分为扬子地块、浙西地块和南华造山带等三个不同类型的构造单元 ;通过对该区微古化石资料的系统整理 ,发现不同构造单元中所产微古化石类型存在较大的差别 ,从一个侧面佐证了三个不同类型的构造单元具有各不相同的演化历史及特点 ;同时通过对扬子地块中发育的大面积浅变质岩系中微古化石资料的整理 ,其微古组合时代主要为蓟县纪—青白口纪 ,结合岩石地层及其它相关资料综合分析与对比研究 ,认为扬子地块中大面积出露的浅变质岩系时代为中元古代 ;
The complex tectonics of northeast Jiangxi are divided into three different tectonic cells, Yangtze block,West Zhejiang block and Nanhua orogenic zone. The microfossils have much more difference in different tectonic cells showing different evolution history for each tectonic cell from the data of microfossil. The microfossil association of epirock in Yangtze block mainly is Jixian period～Qingbaikou period. So the widespread epirock crops in Yangtze block are Middle Proterozoic Subera dealt with rock stratigraphy and other data. The result has an important significance for study on history of tectonic evolution of different tectonic cells in Northeast Jiangxi province.
出处
《火山地质与矿产》
2001年第3期177-185,共9页
Volcanology & Mineral Resources
基金
1 :2 5万景德镇幅上饶幅南昌幅区域地质调查项目 (项目编号 :2 0 0 0 130 0 0 0 2 0 91)资助
