Magnetochronology of the Oligocene mammalian faunas in the LanzhouBasin, Northwest China

doi:10.1016/j.jseaes.2018.03.021

IEECAS OpenIR > 古环境研究室

	Magnetochronology of the Oligocene mammalian faunas in the LanzhouBasin, Northwest China
	Zhang,P(Zhang,Peng)1,2; Ao,H(Ao, Hong)1,3; Dekkers, M.J(Dekkers, Mark J)4; An, ZS(An, Zhisheng)1,2; Wang, LJ(Wang, Lijuan)1; Li,YX(Li, Yongxiang)5; Liu, SH(Liu, Shihang)1,6; Qiang, XK(Qiang,Xiaoke)1; Chang, H(Chang, Hong)1; Zhao, H(Zhao,Hui)1,7; Ao, Hong
	2018-06-15
发表期刊	Journal of Asian Earth Sciences
卷号	159 期号:2018 页码:24-33
文章类型	期刊论文
摘要	The fluvio-lacustrine sequence in the Lanzhou Basin, located at the northeastern margin of the Tibetan Plateau, is a rich source of Oligocene–Miocene mammalian fossils, critical to our understanding of the terrestrial Asian mammal and environmental evolution. While the Miocene mammalian faunas have been dated with magnetostratigraphy, the numerical age of the Oligocene faunas remains controversial. Here, we present new high-resolution magnetostratigraphic records from two fluvio-lacustrine sections in the central Lanzhou Basin, which provide age constraints for two Oligocene mammal assemblages in the Lower Xianshuihe Formation, the Nanpoping and Xiagou Faunas. The Lower Xianshuihe Formation is suggested to span from polarity chrons C12r to C7n, ranging from ca 31 Ma to 24 Ma. The Early Oligocene Nanpoping Fauna correlates to the C12r–C11n.2n polarity chron intervals, yielding an age of ∼31–30 Ma, while the Late Oligocene Xiagou Fauna correlates to chrons C7An–C8n.2n, with an age of ∼26–25 Ma. This magnetostratigraphy provides a more accurate age than biochronology for the Oligocene giant mammal Indricotheriinae contained in the Nanpoping Fauna and sheds new light on the chronology and distribution of Indricotheriinae in Eurasia. The faunas, in particular the Nanpoping Fauna, suggest a mixed setting of woodlands and grasslands associated with a humid environment in the Lanzhou Basin during Early Oligocene, in contrast to its present arid environment with few woodlands.
关键词	Magnetostratigraphy Lanzhou Basin Land Mammal Fauna Paleoenvironment
DOI	10.1016/j.jseaes.2018.03.021
收录类别	SCI
所属项目编号	2013CB956402 ; 41174057 ; 41290253 ; 41704071 ; SKLLQG1535
语种	英语
项目资助者	National Basic ResearchProgram of China ; National Basic ResearchProgram of China ; National Natural ScienceFoundation of China ; National Natural ScienceFoundation of China ; Open Grant of the State Key Laboratory of Loess and QuaternaryGeology ; Open Grant of the State Key Laboratory of Loess and QuaternaryGeology
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/5306
专题	古环境研究室
通讯作者	Ao, Hong
作者单位	1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China 2.Beijing Normal University, Beijing 100875, China 3.Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA 4.Paleomagnetic Laboratory ‘Fort Hoofddijk’, Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Budapestlaan 17, 3584 CD Utrecht, TheNetherlands 5.State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China 6.University of Chinese Academy of Sciences, Beijing 100049, China 7.Department of Geography, Shaanxi Normal University, Xi'an 710062, China
第一作者单位	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Zhang,P,Ao,H,Dekkers, M.J,et al. Magnetochronology of the Oligocene mammalian faunas in the LanzhouBasin, Northwest China[J]. Journal of Asian Earth Sciences,2018,159(2018):24-33.
APA	Zhang,P.,Ao,H.,Dekkers, M.J.,An, ZS.,Wang, LJ.,...&Ao, Hong.(2018).Magnetochronology of the Oligocene mammalian faunas in the LanzhouBasin, Northwest China.Journal of Asian Earth Sciences,159(2018),24-33.
MLA	Zhang,P,et al."Magnetochronology of the Oligocene mammalian faunas in the LanzhouBasin, Northwest China".Journal of Asian Earth Sciences 159.2018(2018):24-33.

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