气候变化领域集成服务门户(CCPortal): 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

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DOI	10.1016/j.gloplacha.2019.103001
	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, Weilin; Yan, Maodu; Fang, Xiaomin; Zhang, Dawen; Zhang, Tao; Zan, Jinbo; Song, Chunhui
通讯作者	Zhang, WL (通讯作者)
发表日期	2019
ISSN	0921-8181
EISSN	1872-6364
卷号	182
英文摘要	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.
关键词	RED-RIVER XIANSHUIHE-XIAOJIANG SHEAR ZONE FAULT ZONE FOLD TEST YUNNAN EVOLUTION UPLIFT CHINA MAGNETOSTRATIGRAPHY
英文关键词	Magnetostratigraphy; Middle-late Miocene; Ecological environment; Xiaolongtan Basin; Southeastern Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000490045000013
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259468
推荐引用方式 GB/T 7714	Zhang, Weilin,Yan, Maodu,Fang, Xiaomin,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]. 中国科学院青藏高原研究所,2019,182.
APA	Zhang, Weilin.,Yan, Maodu.,Fang, Xiaomin.,Zhang, Dawen.,Zhang, Tao.,...&Song, Chunhui.(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.
MLA	Zhang, Weilin,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(2019).