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High-resolution paleomagnetic constraint on the oldest hominoid- fossil-bearing sequence in the Xiaolongtan Basin, southeast margin of the Tibetan Plateau and its geologic implications
Zhang, WL (Zhang, Weilin)1,2; Yan, MD (Yan, Maodu)1,2; Fang, XM (Fang, Xiaomin)1,2; Zhang, DW (Zhang, Dawen)3; Zhang, T (Zhang, Tao)1; Zan, JB (Zan, Jinbo)1,2; Song, CH (Song, Chunhui)4,5
Source PublicationGLOBAL AND PLANETARY CHANGE
2019
Volume182Issue:0Pages:103001
DOI10.1016/j.gloplacha.2019.103001
Abstract

Sediments in the Xiaolongtan Basin at the southeastern margin of the Tibetan Plateau (SEMTP) not only contain an abundance of the oldest Chinese hominoid fossils, but also a record of the evolution of the Indian monsoon and the uplift of the southeastern Tibetan Plateau. However, these Middle-Upper Miocene sedimentary sequences have lacked a precise chronology, hampering our ability to reconstruct the regional tectonic uplift and the paleoecological environment. We carried out high-resolution paleomagnetic dating throughout the fluvio-lacustrine sequence in the Xiaolongtan Basin. The 487.5 m-thick sequence here revealed 11 reversed and 11 normal zones that span from chron 5n.2n to chron 5ACr, yielding magnetostratigraphic ages of similar to 14.1-10.0 Ma for the section, and 12.5 Ma and 11.7 Ma for the two hominoid-fossil bearing beds. Combined with lithological analyses and the evidence for ecological characteristics, we suggest that four notable ecological environmental phases had emerged in the Xiaolongtan Basin after it was formed at around 14.1 Ma. These were as follows: Phase I (14.1-12.6 Ma) with humid-hot forest steppe, Phase II (12.6-11.6 Ma) with subtropical evergreen broad-leaved forest, Phase III (11.6-10.0 Ma) with a hot-dry and evaporative shallow lake and Phase IV (after 10.0 Ma) with a subtropical semiarid steppe environment. After similar to 10.0 Ma deposition gradually ceased, albeit recurring sporadically until the Early Pleistocene.

Subject AreaGeology
WOS IDWOS:000490045000013
Language英语
Indexed BySCI
KeywordRed-river Xianshuihe-xiaojiang Shear Zone Fault Zone Fold Test Yunnan Evolution Uplift China Magnetostratigraphy
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
Cooperation Status国内
ISSN0921-8181
Department大陆碰撞与高原隆升重点实验室
URL查看原文
PublisherELSEVIER
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9109
Collection图书馆
Corresponding AuthorZhang, WL (Zhang, Weilin)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Key Lab Continental Collis & Plateau Uplift, Beijing 100010, Peoples R China;
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
3.Zaozhuang Univ, Zaozhuang 277160, Peoples R China;
4.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Gansu, Peoples R China;
5.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Gansu, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, WL ,Yan, MD ,Fang, XM ,et al. High-resolution paleomagnetic constraint on the oldest hominoid- fossil-bearing sequence in the Xiaolongtan Basin, southeast margin of the Tibetan Plateau and its geologic implications[J]. GLOBAL AND PLANETARY CHANGE,2019,182(0):103001.
APA Zhang, WL .,Yan, MD .,Fang, XM .,Zhang, DW .,Zhang, T .,...&Song, CH .(2019).High-resolution paleomagnetic constraint on the oldest hominoid- fossil-bearing sequence in the Xiaolongtan Basin, southeast margin of the Tibetan Plateau and its geologic implications.GLOBAL AND PLANETARY CHANGE,182(0),103001.
MLA Zhang, WL ,et al."High-resolution paleomagnetic constraint on the oldest hominoid- fossil-bearing sequence in the Xiaolongtan Basin, southeast margin of the Tibetan Plateau and its geologic implications".GLOBAL AND PLANETARY CHANGE 182.0(2019):103001.
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