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A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation
Miao, Yunfa1; Wu, Fuli2,3; Chang, Hong4; Fang, Xiaomin2,3; Deng, Tao5; Sun, Jimin6; Jin, Chunsheng6
2016-03-01
发表期刊GONDWANA RESEARCH
卷号31期号:2016页码:241-252
文章类型Article
摘要The Hoh Xil Basin, lying in the central Tibetan Plateau, is key to understanding the Cenozoic tectonics, paleoelevation and paleoclimate changes that have occurred in the Tibetan Plateau since the collision of the Indian and Asian tectonic plates. However, the stratigraphic age and paleoelevation indicated by the sediments of the Hoh Xil Basin remain hotly debated. Here we report on one palynological record from the TTH-C section, extracted from the Yaxicuo Group (the stratigraphic unit between the Fenghuoshan and Wudaoliang groups), and analyze its implications for stratigraphic age, paleoclimate and paleoelevation in the Hoh Xil Basin. The record shows that palynological taxa are mainly dominated by xerophytic Ephedripites, Nitrariadites (Nitrariapollis) and Chenopodipollis, with few ferns and conifers. Rich morphologies correspond well with those in the Xia Ganchaigou Formation (Fm) of the Qaidam Basin to the north. Palynological percentages are well correlated with the middle member of the Xia Ganchaigou Fm in the Qaidam Basin as well as the lower member of the Mahalagou Fm in the Xining Basin to the northeast. The ages of the middle member of the Xia Ganchaigou and lower member of the Mahalagou Fms from these two basins are both identical to the Bartonian Stage (similar to 40-37 Ma) of the Late Eocene, according to their respective high-resolution magnetostratigraphic dating. This means that the age of the Yaxicuo Group at least covers the Bartonian Stage. Besides the Qaidam and Xining basins, the palynological assemblages of the TTH-C section are also similar to those of three other sites (the Jiuquan, Tu-ha and Hetao basins), indicating similarly arid climates dominated by a northwestern Chinese subtropical high, and a relatively low paleoelevation in the Hoh Xil Basin (mostly <2000 m a.s.l.) in the Late Eocene. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
关键词Tibetan Plateau Palynology Late Eocene Paleoclimate Paleoelevation
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.gr.2015.01.007
关键词[WOS]CENOZOIC TECTONIC EVOLUTION ; EAST-WEST EXTENSION ; QAIDAM BASIN ; CLIMATE-CHANGE ; ENVIRONMENTAL-CHANGES ; FENGHUOSHAN GROUP ; NORTHWEST CHINA ; SURFACE POLLEN ; SOUTHERN TIBET ; LUNPOLA BASIN
收录类别SCI
语种英语
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000371555100013
引用统计
被引频次:15[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/361006/5797
专题古环境研究室
作者单位1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100010, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100044, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, POB 9825, Beijing 100029, Peoples R China
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Miao, Yunfa,Wu, Fuli,Chang, Hong,et al. A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation[J]. GONDWANA RESEARCH,2016,31(2016):241-252.
APA Miao, Yunfa.,Wu, Fuli.,Chang, Hong.,Fang, Xiaomin.,Deng, Tao.,...&Jin, Chunsheng.(2016).A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation.GONDWANA RESEARCH,31(2016),241-252.
MLA Miao, Yunfa,et al."A Late-Eocene palynological record from the Hoh Xil Basin, northern Tibetan Plateau, and its implications for stratigraphic age, paleoclimate and paleoelevation".GONDWANA RESEARCH 31.2016(2016):241-252.
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