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Late Oligocene Tibetan Plateau Warming and Humidity: Evidence From a Sporopollen Record

文献类型：期刊论文

作者Wu, Fuli1,2; Miao, Yunfa2,3; Meng, Qingquan4; Fang, Xiaomin1,2; Sun, Jimin2,5
刊名GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
出版日期2019
卷号20期号:1页码:434-441
关键词late Oligocene warming sporopollen Nima Basin coniferous trees south Asian monsoon
ISSN号1525-2027
DOI10.1029/2018GC007775
英文摘要Dramatic warming in the late Oligocene occurred after 8 Ma, characterized by ocean warming and a collapse of the Antarctic ice sheet (the late Oligocene warming event [LOWE]); however, few terrestrial records have yet been employed to verify the LOWE and investigate its associated driving forces. The Nima Basin, located in the central Tibetan Plateau contains thick Oligocene sediments, allowing its ecological record to be used as verification of the LOWE. Here we used the reconstructed vegetation record from the Nima Basin in the 1,100-m-thick DZC section, aided with zircon U-Pb dating of the interbedded tuffite layers. Two tuffite layers yielded ages of about 23.4 and 24.8 Ma; thus, the sedimentary age of the whole section is predicted to be 27.5-22.4 Ma. Sporopollen analysis revealed that the dominant taxa throughout the whole section were conifers (over 85%), including Piceapollis, Pinuspollenites, and Abietpollenites. One notable feature is that the broad-leaved trees (e.g., Quercoidites and Meliaceoidites) increased obviously (averaging from 0.9% to 6.6%, max 41.2%) after 25.6 Ma. This change could be interpreted as a response to late Oligocene global warming, which changed the forest line and corresponding plant species composition. The mean average precipitation of 400-850 and 800-1,000 mm, respectively, inferred from the above vegetation types in the Nima Basin, both exceed the present 150 mm. This indicates that the south Asian monsoon had already developed in the Oligocene and that the LOW event accompanied the global warming.
WOS关键词ASIAN MONSOON ; LUNPOLA BASIN ; CLIMATE ; MA ; MIOCENE ; CARBON ; UPLIFT
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDB03020103] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20070201] ; CAS "Light of West China" Program
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000458607200022
出版者AMER GEOPHYSICAL UNION
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS "Light of West China" Program ; CAS "Light of West China" Program
源URL[http://ir.iggcas.ac.cn/handle/132A11/90696]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Wu, Fuli
作者单位1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Inst, Key Lab Desert & Desertificat, Lanzhou, Gansu, Peoples R China
4.Lanzhou Univ, Sch Earth Sci, Lanzhou, Gansu, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Fuli,Miao, Yunfa,Meng, Qingquan,et al. Late Oligocene Tibetan Plateau Warming and Humidity: Evidence From a Sporopollen Record[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2019,20(1):434-441.
APA Wu, Fuli,Miao, Yunfa,Meng, Qingquan,Fang, Xiaomin,&Sun, Jimin.(2019).Late Oligocene Tibetan Plateau Warming and Humidity: Evidence From a Sporopollen Record.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(1),434-441.
MLA Wu, Fuli,et al."Late Oligocene Tibetan Plateau Warming and Humidity: Evidence From a Sporopollen Record".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.1(2019):434-441.

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来源：地质与地球物理研究所

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