The rise and demise of the Paleogene Central Tibetan Valley-Reference-Cited by-同舟云学术

The rise and demise of the Paleogene Central Tibetan Valley

Published:2022-02-11 Issue:6 Volume:8 Page:
ISSN:2375-2548
Container-title:Science Advances
language:en
Short-container-title:Sci. Adv.

Author:

Xiong Zhongyu¹^ORCID,Liu Xiaohui¹^ORCID,Ding Lin¹²^ORCID,Farnsworth Alex¹³^ORCID,Spicer Robert A.⁴⁵^ORCID,Xu Qiang¹^ORCID,Valdes Paul³^ORCID,He Songlin¹²^ORCID,Zeng Deng¹²,Wang Chao¹²^ORCID,Li Zhenyu¹^ORCID,Guo Xudong¹²^ORCID,Su Tao⁴^ORCID,Zhao Chenyuan¹²^ORCID,Wang Houqi¹,Yue Yahui¹^ORCID

Affiliation:

1. State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.

2. University of Chinese Academy of Sciences, Beijing 100049, China.

3. School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK.

4. CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China.

5. School of Environment, Earth and Ecosystem Sciences, The Open University, Milton Keynes MK7 6AA, UK.

Abstract

Reconstructing the Paleogene topography and climate of central Tibet informs understanding of collisional tectonic mechanisms and their links to climate and biodiversity. Radiometric dates of volcanic/sedimentary rocks and paleotemperatures based on clumped isotopes within ancient soil carbonate nodules from the Lunpola Basin, part of an east-west trending band of basins in central Tibet and now at 4.7 km, suggest that the basin rose from <2.0 km at 50 to 38 million years (Ma) to >4.0 km by 29 Ma. The height change is quantified using the rates at which wet-bulb temperatures ( T w ) decline at land surfaces as those surface rise. In this case, T w fell from ~8°C at ~38 Ma to ~1°C at 29 Ma, suggesting at least ~2.0 km of surface uplift in ~10 Ma under warm Eocene to Oligocene conditions. These results confirm that a Paleogene Central Tibetan Valley transformed to a plateau before the Neogene.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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