Magnetostratigraphic constraints on the fossiliferous Ulantatal sequence in Inner Mongolia, China: Implications for Asian aridification and faunal turnover before the Eocene-Oligocene boundary

doi:10.1016/j.epsl.2020.116125

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	Magnetostratigraphic constraints on the fossiliferous Ulantatal sequence in Inner Mongolia, China: Implications for Asian aridification and faunal turnover before the Eocene-Oligocene boundary
	Wasiljeff, Joonas 1; Kaakinen, Anu 1; Salminen, Johanna M.1,2; Zhang, Zhaoqun 3,4,5
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2020-04-15
卷号	536 页码:15
关键词	Eocene-Oligocene boundary magnetostratigraphy eolian dust Mongolian Remodeling mammalian fossils Asian aridification
ISSN号	0012-821X
DOI	10.1016/j.epsl.2020.116125
通讯作者	Kaakinen, Anu(anu.kaakinen@helsinki.fi) ; Zhang, Zhaoqun(zhangzhaoqun@ivpp.ac.cn)
英文摘要	The transition from Eocene to Oligocene and its implications in the terrestrial realm has been a focal target for Cenozoic climate and environment research as it is widely considered the most dramatic climatic shift of the past 50 million years. Tibetan Plateau and proximal areas have been of utmost interest since the biogeographic relationships and understanding of the depositional environments in the region have remained unsettled during and after the Eocene-Oligocene transition (EOT). This study derives a first chronostratigraphic framework for Ulantatal, a fossiliferous area in Inner Mongolia, China. Based on paleomagnetic reversal stratigraphy and the constraints of faunal correlations, the time spanned in the strata is between ca. 35 and 27 Ma, thus exposing a long sedimentary succession ranging from the latest Eocene to late Oligocene. The lithological characteristics reveal these extensive fine-grained sediments mainly originate from eolian dust deposition, the onset of which is constrained at the latest Eocene (ca. 34.8 Ma). The presence of post "Mongolian Remodeling" fauna already in the late Eocene of Ulantatal demonstrates unequivocally that the major faunal turnover preceded the Eocene-Oligocene boundary, earlier to what has been recorded from other East Asian localities. The faunal composition predominated by rodents and lagomorphs remains strikingly stable across the Eocene-Oligocene boundary, suggesting the EOT related change in the animal communities was gradual or stepwise rather than abrupt. Moreover, the turnover into this environment dominated by small mammals can be linked with Eocene acidification of Asia, highlighting the dynamic responses of terrestrial systems to changing environment and climate associated with the EOT. (C) 2020 The Author(s). Published by Elsevier B.V.
资助项目	Research Council of Norway[226214] ; Centre for Earth Evolution and Dynamics, University of Oslo ; CAS[XDB26000000] ; NSFC[41472003] ; Academy of Finland[316799] ; Academy of Finland[319277] ; GeoDoc ; Waldemar von Frenckell Foundation
WOS关键词	RED CLAY DEPOSITS ; SEA RETREAT ; TIME-SCALE ; CLIMATE ; TRANSITION ; STABILITY ; BASIN ; BIOSTRATIGRAPHY ; ACCUMULATION ; SEASONALITY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000521110800017
资助机构	Research Council of Norway ; Centre for Earth Evolution and Dynamics, University of Oslo ; CAS ; NSFC ; Academy of Finland ; GeoDoc ; Waldemar von Frenckell Foundation
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/17297]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Kaakinen, Anu; Zhang, Zhaoqun
作者单位	1.Univ Helsinki, Dept Geosci & Geog, POB 64, FIN-00014 Helsinki, Finland 2.Univ Helsinki, Dept Phys, POB 64, FIN-00014 Helsinki, Finland 3.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origin, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 4.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wasiljeff, Joonas,Kaakinen, Anu,Salminen, Johanna M.,et al. Magnetostratigraphic constraints on the fossiliferous Ulantatal sequence in Inner Mongolia, China: Implications for Asian aridification and faunal turnover before the Eocene-Oligocene boundary[J]. EARTH AND PLANETARY SCIENCE LETTERS,2020,536:15.
APA	Wasiljeff, Joonas,Kaakinen, Anu,Salminen, Johanna M.,&Zhang, Zhaoqun.(2020).Magnetostratigraphic constraints on the fossiliferous Ulantatal sequence in Inner Mongolia, China: Implications for Asian aridification and faunal turnover before the Eocene-Oligocene boundary.EARTH AND PLANETARY SCIENCE LETTERS,536,15.
MLA	Wasiljeff, Joonas,et al."Magnetostratigraphic constraints on the fossiliferous Ulantatal sequence in Inner Mongolia, China: Implications for Asian aridification and faunal turnover before the Eocene-Oligocene boundary".EARTH AND PLANETARY SCIENCE LETTERS 536(2020):15.