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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
DOI10.1016/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
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被引频次:1[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
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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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