RIVER SHEAR ZONE
; VOLCANIC-ROCKS
; ASIAN MONSOON
; SE MARGIN
; PLATEAU
; PALEOALTIMETRY
; DEFORMATION
; CHINA
; BASIN
; BIODIVERSITY
WOS学科分类:
Multidisciplinary Sciences
WOS研究方向:
Science & Technology - Other Topics
英文摘要:
The uplift history of south-eastern Tibet is crucial to understanding processes driving the tectonic evolution of the Tibetan Plateau and surrounding areas. Underpinning existing palaeoaltimetric studies has been regional mapping based in large part on biostratigraphy that assumes a Neogene modernization of the highly diverse, but threatened, Asian biota. Here, with new radiometric dating and newly collected plant-fossil archives, we quantify the surface height of part of the south-eastern margin of Tibet in the latest Eocene (similar to 34 Ma) to be similar to 3 km and rising, possibly attaining its present elevation (3.9 km) in the early Oligocene. We also find that the Eocene-Oligocene transition in south-eastern Tibet witnessed leaf-size diminution and a floral composition change from sub-tropical/warm temperate to cool temperate, likely reflective of both uplift and secular climate change, and that, by the latest Eocene, floral modernization on Tibet had already taken place, implying modernization was deeply rooted in the Palaeogene.
1.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650204, Yunnan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, State Key Lab Paleobiol & Stratig, Nanjing 210008, Peoples R China 5.Open Univ, Sch Environm Earth & Ecosyst Sci, Milton Keynes MK7 6AA, Bucks, England 6.Sun Yat Sen Univ, Guangdong Prov Key Lab Geodynam & Geohazards, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China 7.Linyi Univ, Inst Geol & Paleontol, Linyi 276000, Shandong, Peoples R China 8.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 9.Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650093, Yunnan, Peoples R China 10.Univ Bristol, Sch Geog Sci, Bristol BS8 1TH, Avon, England 11.Univ Bristol, Cabot Inst, Bristol BS8 1TH, Avon, England
Recommended Citation:
Su, Tao,Spicer, Robert A.,Li, Shi-Hu,et al. Uplift, climate and biotic changes at the Eocene-Oligocene transition in south-eastern Tibet[J]. NATIONAL SCIENCE REVIEW,2019-01-01,6(3):495-504