40Ar/39Ar dating of ignimbrite from inner Mongolia, northeastern China, indicates a post-Middle Jurassic age for the overlying Daohugou Bed

被引：183

作者：

He, HY

Wang, XL

Zhou, ZH

Zhu, RX

Jin, F

Wang, F

Ding, X

Boven, A

机构：

[1] Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China

[2] Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China

[3] China Univ Geosci, Beijing 100083, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 20期

关键词：

1035 Geochemistry: Geochronology; 8404 Volcanology: Ash deposits; 9320 Information related to geographic region: Asia; 9609 Information related to geologic time: Mesozoic;

D O I：

10.1029/2004GL020792

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The 40Ar/39Ar step heating analyses of K-feldspar derived from the ignimbrite in Inner Mongolia, China indicates that they were formed at 159.8 +/- 0.8 Ma, which provides a maximum age for the overlying fossil-bearing lacustrine deposits (Daohugou Bed). This result favors a post-Middle Jurassic ( Late Jurassic or younger), rather than the Middle Jurassic age for the Daohugou Bed. Such a result is generally consistent with vertebrate biostratigraphic evidence, providing a maximum known age for the first appearance of several major animal groups such as Cryptobranchidae of Urodela ( salamanders) and Maniraptora ( birds and their closest dinosaurian relatives).

引用

页码：L206091 / 4

页数：4

共 18 条

[1]

Chang M.-M., 2003, JEHOL BIOTA

[2]

CHEN W, 2004, GEOL PUBL, P95

[3] Late Jurassic salamanders from northern China [J].