CCPortal
DOI10.1029/2018GC007775
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
发表日期2019
ISSN1525-2027
卷号20期号:1页码:434-441
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研究方向Geochemistry & Geophysics
来源期刊GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/90726
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],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.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Wu, Fuli]的文章
[Miao, Yunfa]的文章
[Meng, Qingquan]的文章
百度学术
百度学术中相似的文章
[Wu, Fuli]的文章
[Miao, Yunfa]的文章
[Meng, Qingquan]的文章
必应学术
必应学术中相似的文章
[Wu, Fuli]的文章
[Miao, Yunfa]的文章
[Meng, Qingquan]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。