The Ar-40/Ar-39 dating of the early Jehol Biota from Fengning, Hebei Province, northern China

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	The Ar-40/Ar-39 dating of the early Jehol Biota from Fengning, Hebei Province, northern China
	He, HY ; Wang, XL; Jin, F ; Zhou, ZH; Wang, F ; Yang, LK ; Ding, X ; Boven, A ; Zhu, RX ; He, HY (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Lab Paleomagnetism & Geochronol SKL LE, Beijing 100029, Peoples R China.
刊名	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
	2006-04-12
卷号	7 页码:—
关键词	Dabeigou Formation Jehol Biota Ar-40/ar-39 Dating Hebei Northern China Geochronology : Radioisotope Geochronology Geographic Location : Asia Information Related To Geologic Time : Cretaceous
ISSN号	1525-2027
文献子类	Article
英文摘要	The bird fossil-bearing deposits at the Jiecaigou section, correlative to the Dabeigou Formation, in Fengning, Hebei Province, northern China, is well known for yielding a fossil assemblage representing the earliest evolutionary stage of the Jehol Biota. The precise age of the fossil-bearing deposits, however, is unknown. The Ar-40/Ar-39 age spectrum obtained on bulk K-feldspars from the tuff layer about 2 m below the bird fossil-bearing layer gave a plateau age of 129.0 +/- 1.3 Ma (2 sigma, full external error) and an isochron age of 132.3 +/- 4.5 Ma (2 sigma, full external error). Seventeen total-fusion Ar-40/Ar-39 ages on K-feldspars from the interbedded tuff about 6 m below the fossil-bearing layer resulted in a weighted mean of 130.7 +/- 1.4 Ma (2 sigma, full external error). These dates suggest an age of similar to 131 Ma for the early Jehol Biota and combined with previous dating indicate that this biota lasted at least from 131 Ma to 120 Ma (Late Hauterivian to Aptian). These dates also represent the earliest absolute age for known enantiornithine birds in the world.; The bird fossil-bearing deposits at the Jiecaigou section, correlative to the Dabeigou Formation, in Fengning, Hebei Province, northern China, is well known for yielding a fossil assemblage representing the earliest evolutionary stage of the Jehol Biota. The precise age of the fossil-bearing deposits, however, is unknown. The Ar-40/Ar-39 age spectrum obtained on bulk K-feldspars from the tuff layer about 2 m below the bird fossil-bearing layer gave a plateau age of 129.0 +/- 1.3 Ma (2 sigma, full external error) and an isochron age of 132.3 +/- 4.5 Ma (2 sigma, full external error). Seventeen total-fusion Ar-40/Ar-39 ages on K-feldspars from the interbedded tuff about 6 m below the fossil-bearing layer resulted in a weighted mean of 130.7 +/- 1.4 Ma (2 sigma, full external error). These dates suggest an age of similar to 131 Ma for the early Jehol Biota and combined with previous dating indicate that this biota lasted at least from 131 Ma to 120 Ma (Late Hauterivian to Aptian). These dates also represent the earliest absolute age for known enantiornithine birds in the world.
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WOS关键词	EARLY EVOLUTION ; CRETACEOUS AGE ; DINOSAUR ; YIXIAN ; ORIGIN ; BIRDS
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000237280200005
公开日期	2013-11-27
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/3456]
专题	古脊椎动物与古人类研究所_图书馆1 古脊椎动物与古人类研究所_古低等脊椎动物研究室
通讯作者	He, HY (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Lab Paleomagnetism & Geochronol SKL LE, Beijing 100029, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Lab Paleomagnetism & Geochronol SKL LE, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.Chinese Univ Geosci, Marine Sch, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	He, HY,Wang, XL,Jin, F,et al. The Ar-40/Ar-39 dating of the early Jehol Biota from Fengning, Hebei Province, northern China[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2006,7:—.
APA	He, HY.,Wang, XL.,Jin, F.,Zhou, ZH.,Wang, F.,...&He, HY .(2006).The Ar-40/Ar-39 dating of the early Jehol Biota from Fengning, Hebei Province, northern China.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,7,—.
MLA	He, HY,et al."The Ar-40/Ar-39 dating of the early Jehol Biota from Fengning, Hebei Province, northern China".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 7(2006):—.