IGGCAS OpenIR  > 新生代地质与环境院重点实验室
Late Oligocene Tibetan Plateau Warming and Humidity: Evidence From a Sporopollen Record
Wu, Fuli1,2; Miao, Yunfa2,3; Meng, Qingquan4; Fang, Xiaomin1,2; Sun, Jimin2,5
2019
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
ISSN1525-2027
Volume20Issue:1Pages:434-441
AbstractDramatic 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.
Keywordlate Oligocene warming sporopollen Nima Basin coniferous trees south Asian monsoon
DOI10.1029/2018GC007775
Funding OrganizationStrategic 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
WOS KeywordASIAN MONSOON ; LUNPOLA BASIN ; CLIMATE ; MA ; MIOCENE ; CARBON ; UPLIFT
Language英语
Funding ProjectStrategic 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
Funding OrganizationStrategic 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
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000458607200022
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90696
Collection新生代地质与环境院重点实验室
Corresponding AuthorWu, Fuli
Affiliation1.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
Recommended Citation
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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