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Reconstruction of the latest Eocene-early Oligocene paleoenvironment in the Hoh Xil Basin (Central Tibet) based on palynological and ostracod records
Song, Bowen1,2; Zhang, Kexin1,2; Han, Fang3; Liu, Zhiyuan4; Ai, Keke5; Li, Sha(李莎)6; Xu, Yadong2; Yang, Tinglu3
2021-09-01
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
卷号217页码:13
摘要

As the largest intracontinental basin in the Tibetan Plateau hinterland, the Hoh Xil Basin is an ideal area for exploring the coupled history of climate-tectonic relationships in the plateau's interior. However, the detailed paleoenvironmental research on the Hoh Xil Basin is quite insufficient. In this study, we collected palynological and ostracod samples from well-exposed Cenozoic lacustrine strata in the Hoh Xil Basin to reconstruct the paleoenvironment and paleoelevation of the Hoh Xil Basin. Based on the discovery of two key index fossils (Austrocypris cf. posticaudata and Lychnothamnus vectensis), we propose the latest Eocene-early Oligocene (latest Priabonian-earliest Rupelian) age for the strata of the Yaxicuo Formation in the Tongtianhe section. The palynological assemblage suggests that the Hoh Xil Basin was dominated by temperate broadleaved forest and that a warm climate prevailed in this region during the latest Eocene-early Oligocene. Roughly consistent with the overall warm climate confirmed by palynological evidence, the ostracod record indicates that a large freshwater lake existed within the warm environment of the Hoh Xil Basin during the latest Eocene-early Oligocene. By using the coexistence approach (CoA) to evaluate the fossil palynological assemblage, combined with the calibration of the effects of temperature differences and lapse rates, a paleoelevation of 2700 +/- 200 m a.s.l. was estimated for the Hoh Xil Basin during the latest Eocene-early Oligocene, representing the height between the basin lake and the crests of the surrounding mountains.

关键词Paleoenvironment Palynology Ostracod Hoh Xil Basin Latest Eocene-early Oligocene
DOI10.1016/j.jseaes.2021.104860
收录类别SCI
语种英语
关键词[WOS]SURFACE POLLEN ; STABLE-ISOTOPE ; QAIDAM BASIN ; TECTONIC EVOLUTION ; TOPOGRAPHIC GROWTH ; CLIMATIC EVOLUTION ; FENGHUOSHAN GROUP ; PLATEAU UPLIFT ; ZHADA BASIN ; NORTHERN
资助项目National Natural Science Foundation of China[42072141] ; National Natural Science Foundation of China[41702363] ; National Natural Science Foundation of China[41702118] ; Geological Survey of China[DD20190370]
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000675467300002
项目资助者National Natural Science Foundation of China ; Geological Survey of China
出版者PERGAMON-ELSEVIER SCIENCE LTD
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/38412
专题中国科学院南京地质古生物研究所
通讯作者Song, Bowen
作者单位1.China Univ Geosci, Inst Geol Survey, Wuhan 430074, Peoples R China
2.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
3.East China Univ Technol, Sch Earth Sci, Nanchang 330013, Jiangxi, Peoples R China
4.Hebei Prov Zhonglian Energy Environm Protect Tech, Shijiazhuang 050000, Hebei, Peoples R China
5.Mianyang Teachers Coll, Sch Resource & Environm Engn, Mianyang 621000, Sichuan, Peoples R China
6.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714
Song, Bowen,Zhang, Kexin,Han, Fang,et al. Reconstruction of the latest Eocene-early Oligocene paleoenvironment in the Hoh Xil Basin (Central Tibet) based on palynological and ostracod records[J]. JOURNAL OF ASIAN EARTH SCIENCES,2021,217:13.
APA Song, Bowen.,Zhang, Kexin.,Han, Fang.,Liu, Zhiyuan.,Ai, Keke.,...&Yang, Tinglu.(2021).Reconstruction of the latest Eocene-early Oligocene paleoenvironment in the Hoh Xil Basin (Central Tibet) based on palynological and ostracod records.JOURNAL OF ASIAN EARTH SCIENCES,217,13.
MLA Song, Bowen,et al."Reconstruction of the latest Eocene-early Oligocene paleoenvironment in the Hoh Xil Basin (Central Tibet) based on palynological and ostracod records".JOURNAL OF ASIAN EARTH SCIENCES 217(2021):13.
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