Magnetostratigraphic study and its geological significance of the dinosaur egg-bearing section in Xixia Basin, Central China

doi:10.3969/j.issn.0001-5733.2010.04.012

	Magnetostratigraphic study and its geological significance of the dinosaur egg-bearing section in Xixia Basin, Central China
	Li Zhen-Yu 1,2; Huang Bao-Chun 1; Fang Xiao-Si 3; Zhang Chun-Xia 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2010-04-01
卷号	53 期号:4 页码:874-887
关键词	Xixia Basin Paleomagnetism Remanent Magnetization Carriers Magnetostratigraphy Dinosaur Egg Fossils
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2010.04.012
文献子类	Article
英文摘要	A paleomagnetic and rock magnetic investigation is reported from the dinosaur egg-bearing Yangcheng-Danshui section in the Xixia Basin (Henan province in central China). Results indicate that hematite and magnetite are the main carriers of remanence in this terrigenous section. The primary nature of characteristic remanent magnetization (ChRM) is ascertained by positive reversal test, suggesting that the ChRM was probably acquired in or close to the period when the sedimentary rocks were formed. Together with biostratigraphical and biochronological data, magnetostratigraphic results in this section unravel that the upper section spanning from 2973 m to 3023 m was deposited between 83Ma and 79 Ma in the Late Cretaceous. It therefore appears that the highest dinosaur egg-bearing layer in the Xixia Basin was accumulated prior to 83 Ma. These results imply that the extinction of the large reptiles commonly occurred in the Late Cretaceous might be related to the sharply rapid climate and natural environment change in the Xixia Basin, central China. In addition, the terrane of the section located is suggested to have undergone some 18 degrees clockwise rotation with respect to the North and South China blocks during the post-Late Cretaceous times, which was possibly triggered by the local tectonic activities.
WOS关键词	CRETACEOUS-TERTIARY BOUNDARY ; K-T BOUNDARY ; POLAR WANDER PATH ; NORTH CHINA ; PALEOMAGNETIC DATA ; CHICXULUB IMPACT ; SOUTH CHINA ; TECTONIC IMPLICATIONS ; TIANSHAN MOUNTAINS ; MOLASSE DEPOSITS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000277220400012
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73220]
专题	中国科学院地质与地球物理研究所
通讯作者	Li Zhen-Yu
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, SKL LE, Beijing 100029, Peoples R China 2.Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Geol Museum China, Beijing 100034, Peoples R China
推荐引用方式 GB/T 7714	Li Zhen-Yu,Huang Bao-Chun,Fang Xiao-Si,et al. Magnetostratigraphic study and its geological significance of the dinosaur egg-bearing section in Xixia Basin, Central China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2010,53(4):874-887.
APA	Li Zhen-Yu,Huang Bao-Chun,Fang Xiao-Si,&Zhang Chun-Xia.(2010).Magnetostratigraphic study and its geological significance of the dinosaur egg-bearing section in Xixia Basin, Central China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,53(4),874-887.
MLA	Li Zhen-Yu,et al."Magnetostratigraphic study and its geological significance of the dinosaur egg-bearing section in Xixia Basin, Central China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 53.4(2010):874-887.