The existing time of Sihetun vertebrate in western Liaoning,China——Evidence from U-Pb dating of zircon

作     者：WANG Songshan~1,WANG Yuanqing~2, HU Huaguang~1 & LI Huimin~3 1.Institute of Geology and Geophysics,Chinese Academy of Sciences, Beijing 100029,China 2.Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China 3.Tianjin Institute of Geology and Mineral Resources,Tianjin 300170, China 

会议名称：《中国科学院地质与地球物理研究所2001学术年会》

会议日期：2001年

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.49873023) 

关 键 词：Sihetun vertebrates tuff zircon U-Pb dating 

摘      要：In different opinions,the stratigraphic time of the feathered dinosaurs and eariy birds in Sihetun and its neighboring areas in Beipiao,western Liaoning is appointed to different epoches of eras,such as Late Jurassic,Early Cretaceous and Late Jurassic-Early *** the recently dating data are still very different This note first reported the U-Pb age of(125.2±0.9) Ma ofzircon separated from tuff of Sihetun vertebrates *** age reveals that Sihetun vertebrate belongs to Early *** method is more objective,because of the strong ability of disturbance resistance and high U-Pb blocking temperature of zircons.