摘要
“江南古陆”东北端上溪群中，发现了虫牙类化石和疑源类化石组合，为这套地层的准确定时，提供了直接证据。经鉴定，这一化石及化石组合的时代为寒武－奥陶纪，而不是以往所认为的中元古代。这些化石的发现说明依据岩体同位素年龄确定围岩年龄具有不确定性，另外，这一发现对研究该区的构造演化史具有重要意义。
Whether the distributive province of Shangxi Group metamorphosed strata in southern Anhui is an old land or an orogenic belt is quite controversial by geologists, but the age of the metamorphosed strata is very important to solve this problem. The scolecodonts and acritarchs reported here are new discoveries . They provide a direct evidence to the recognition of their ages and in the meantime some problems about the country rock ages determinated by the isotopic ages of intrusive bodies are presented. This discovery possesses important significance in the study of tectonic evolution of this area.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2001年第2期105-107,共3页
Oil & Gas Geology
基金
本文为国家自然科学基金(编号:49372137)
安徽省地质矿产局联合资助项目成果之一。
