New evidence for Cretaceous age of the feathered dinosaurs of Liaoning: zircon U-PbSHRIMP dating of the Yixian Formation in Sihetun, northeast China

被引：85

作者：

Yang, Wei

Li, Shuguang ^{[1
]}

Jiang, Baoyu

机构：

[1] Univ Sci & Technol China, Dept Earth & Space Sci, Hefei 230026, Peoples R China

[2] Nanjing Univ, Dept Earth Sci, Nanjing 210093, Peoples R China

来源：

CRETACEOUS RESEARCH | 2007年 / 28卷 / 02期

基金：

中国国家自然科学基金;

关键词：

zircon U-PbSHRIMP dating; Yixian Formation; feathered dinosaurs; Liaoning; Jehol Biota;

D O I：

10.1016/j.cretres.2006.05.011

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

We present the first report of U-Pb SHRIMP dating of zircons from three tuffs interbedded within the "feathered dinosaur" -bearing deposits in western Liaoning, China. One is a sample from the Bed 6 tuff (LX-SHT-12) of the Yixian Formation in Sihetun, for which our zircon U-Pb SHRIMP analyses gave a Cretaceous age (124.7 +/- 2.7Ma), in agreement with a previously published sanidine 40Ar/39Ar age (124.60 +/- 0.25 Ma). The othertwo are from the Bed 1 tuff (LX-HBJ-1) and Bed 8 tuff (LX-HBJ-6) of the Yixian Formation in Huangbanjigou; the former gave an age of 124.9 +/- 1.7 Ma, the latter an age of 122.8 +/- 1.6 Ma. The three consistent ages indicate that the Yixian Formation was deposited in the Early Cretaceous within a very short time period (ca. 2 Ma). (C) 2006 Published by Elsevier Ltd.

引用

页码：177 / 182

页数：6

共 23 条

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