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Late Oligocene–Early Miocenemagnetochronology of themammalian faunas in the LanzhouBasin–environmental changesin the NE margin of the TibetanPlateau
Zhang,P(Zhang,Peng)[1]; Ao,H(Ao, Hong)[1]; Dekkers, M.J.(Dekkers, Mark J.)[2]; Li,YX(Li,Yongxiang)[3]; An,ZS(An,Zhisheng)[1]
2016-11-30
发表期刊Scientific Reports
卷号6期号:2016页码:38032
文章类型期刊论文
摘要

A large number of terrestrial mammalian fossils were reported in the well-exposed Paleogene and Neogene fluvio-lacustrine strata in Western China. Their accurate ages are crucial to understand the mammalian and environmental evolution associated with the step-wise uplift of the Tibetan Plateau. At present their ages are surprisingly poorly constrained. Here, we present a high-resolution magnetostratigraphic dating of the Late Oligocene–Early Miocene mammal assemblages from a 233-m thick fluvio-lacustrine section in the Lanzhou Basin located at the northeastern margin of the Tibetan Plateau, China. The results suggest that the section spans from the polarity subchron C6Cn.2r to C5En, i.e. ranging from ca 23 to 18 Ma. This magnetochronology provides considerably more robust ages for three associated land mammalian faunal assemblages. Updated ages end the debate on existing ambiguous and distinctly different magnetostratigraphic correlations for those Late Oligocene–Early Miocene assemblages. The new ages now enable precise correlation of these faunas to the European Land Mammal and North American Land Mammal Ages. The faunal assemblages further suggest a mixed setting of woodlands and grasslands associated with a humid environment in the Lanzhou Basin during the Late Oligocene–Early Miocene, in contrast to its modern poor vegetation cover and arid environment.

DOI10.1038/srep38023
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5921
专题古环境研究室
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy ofSciences, Xi’an 710075, China;
2.Paleomagnetic Laboratory ‘Fort Hoofddijk’, Department of Earth Sciences, Facultyof Geosciences, Utrecht University, Budapestlaan 17, 3584 CD Utrecht, The Netherlands;
3.State Key Laboratory ofContinental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
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Zhang,P(Zhang,Peng)[1],Ao,H(Ao, Hong)[1],Dekkers, M.J.(Dekkers, Mark J.)[2],等. Late Oligocene–Early Miocenemagnetochronology of themammalian faunas in the LanzhouBasin–environmental changesin the NE margin of the TibetanPlateau[J]. Scientific Reports,2016,6(2016):38032.
APA Zhang,P,Ao,H,Dekkers, M.J.,Li,YX,&An,ZS.(2016).Late Oligocene–Early Miocenemagnetochronology of themammalian faunas in the LanzhouBasin–environmental changesin the NE margin of the TibetanPlateau.Scientific Reports,6(2016),38032.
MLA Zhang,P,et al."Late Oligocene–Early Miocenemagnetochronology of themammalian faunas in the LanzhouBasin–environmental changesin the NE margin of the TibetanPlateau".Scientific Reports 6.2016(2016):38032.
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