地质学报2018，Vol.92Issue(3)：449-465,17.
华南埃迪卡拉(震旦)系顶部地层划分及与寒武系界线FAD分子的选择
The Division of the Late Ediacaran-Cambrian Boundary Interval Stratigraphy and New Options of Index Fossil FAD in South China
摘要
Abstract
Since the “Snowball Event”,the early life has presented a multi-level,massive evolution,and reached its climax before the eve of the Cambrian.Accompanied the dramatic succession of life,the environment sign of the Earth changed and carbon isotope also shifted dramatically,both of which corresponded to the each stage of life succession.However,a big difference still occurs in the division of the most important geological boundaries,Precambrian-Cambrian stratotype section and point (“Golden Nail”,GSSP).Treptichnus pedum as a marker fossil of the GSSP has been questioned constantly in the global biostratigraphic division (especially in Siberia and South China),partially due to the fact that remains of trace fossils as a symbol also has certain defects.The earliest skeletal fossil Cloudina and the body fossil Shaanxilithes in South China can be well compared on a global scale,and the appearance of these two fossils corresponds to significant positive excursions of carbon isotope.By studying the stratigraphic distribution and geographical distribution characteristics of the fossil zone,this paper analyzes the spatiotemporal features and evolutional significance of the system,and discusses the potentials of Cloudina and Shaanxilithe as markers of Cambrian bottom.Finally,a more ideal standard is proposed to determine the Precambrian-Cambrian boundary.关键词
埃迪卡拉(震旦)系-寒武系/标志化石/遗迹化石/宏体化石/Shaanxilithes/CloudinaKey words
Precambrian-Cambrian/index fossil/trace fossil/Macrofossil/Cloudina/Shaanxilithes引用本文复制引用
顾鹏,钟玲,张国栋,宋思存,唐烽,凌茂前,高林志..华南埃迪卡拉(震旦)系顶部地层划分及与寒武系界线FAD分子的选择[J].地质学报,2018,92(3):449-465,17.基金项目
本文为国家自然科学基金项目(编号41572024) （编号41572024）
中国地质科学院地质研究所基本科研业务费项目(编号YYWF201602)资助的成果. （编号YYWF201602）
