Uplift, climate and biotic changes at the Eocene-Oligocene transition in south-eastern Tibet

被引：2

作者：

Tao Su ^{[1
,2
,3
]}

Robert A.Spicer ^{[1
,4
]}

Shi-Hu Li ^{[5
]}

He Xu ^{[6
]}

Jian Huang ^{[1
]}

Sarah Sherlock ^{[4
]}

Yong-Jiang Huang ^{[7
]}

Shu-Feng Li ^{[1
]}

Li Wang ^{[1
]}

Lin-Bo Jia ^{[7
]}

Wei-Yu-Dong Deng ^{[1
,2
]}

Jia Liu ^{[1
]}

Cheng-Long Deng ^{[8
]}

Shi-Tao Zhang ^{[9
]}

Paul J.Valdes ^{[10
]}

Zhe-Kun Zhou ^{[1
,7
]}

机构：

[1] Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences

[2] Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University

[3] Institute of Geology and Paleontology, Linyi University

[4] State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences

[5] University of Chinese Academy of Sciences

[6] Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences

[7] School of Geographical Sciences and Cabot Institute, University of Bristol

[8] Faculty of Land Resource Engineering, Kunming University of Science and Technology

[9] State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences

[10] School of Environment, Earth and Ecosystem Sciences, The Open University,MK7 6AA, UK

来源：

National Science Review | 2019年 / 6卷 / 03期

基金：

英国自然环境研究理事会; 中国国家自然科学基金;

关键词：

biodiversity; Eocene; Oligocene; plant fossil; Qinghai-Tibetan Plateau; uplift;

D O I：

暂无

中图分类号：

Q914 [古植物学]; P467 [气候变化、历史气候];

学科分类号：

0706 ; 070601 ; 0709 ; 070903 ;

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.

引用

页码：495 / 504

页数：10

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