Uplift, climate and biotic changes at the Eocene-Oligocene transition in south-eastern Tibet
Uplift, climate and biotic changes at the Eocene-Oligocene transition in south-eastern Tibet作者机构：Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Paleobiology and Stratigraphy Nanjing Institute of Geology and Paleontology Chinese Academy of Sciences School of Environment Earth and Ecosystem Sciences The Open UniversityMK7 6AA UK Guangdong Provincial Key Laboratory of Geodynamics and Geohazards School of Earth Sciences and Engineering Sun Yat-sen University Institute of Geology and Paleontology Linyi University Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of Botany Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Faculty of Land Resource Engineering Kunming University of Science and Technology School of Geographical Sciences and Cabot Institute University of Bristol
出 版 物：《National Science Review》 (国家科学评论(英文版))
年 卷 期：2019年第6卷第3期
页 面：495-504页
核心收录：
学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 070601[理学-气象学] 0706[理学-大气科学]
基 金：supported by National Natural Science Foundation of China(31470325 and 41661134049 to T.S.,U1502231and 31590823 to Z.K.Z.) the Strategic Priority Research Program of CAS(XDA20070301 to Z.K.Z.) XTBG International Fellowship for Visiting Scientists to R.A.S.,the grant of Natural Environment Research Council(NE/P013805/1 to P.J.V.) Key Research Program of Frontier Sciences,CAS(QYZDB-SSWSMC016 to T.S.) Youth Innovation Promotion Association,CAS(2017439 to T.S.) the CAS 135 program(2017XTBGF01 to T.S.)
主 题：biodiversity Eocene Oligocene plant fossil Qinghai-Tibetan Plateau uplift
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(～34 Ma) to be ～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.
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