The rise and demise of the Paleogene Central Tibetan Valley

Zhongyu Xiong; Xiaohui Liu; Lin Ding; Alex Farnsworth; Robert A. Spicer; Qiang Xu; Paul Valdes; Songlin He; Deng Zeng; Chao Wang; Zhenyu Li; Xudong Guo; Tao Su; Chenyuan Zhao; Houqi Wang; Yahui Yue

doi:10.1126/sciadv.abj0944

The rise and demise of the Paleogene Central Tibetan Valley

Zhongyu Xiong, Xiaohui Liu, Lin Ding^*, Alex Farnsworth, Robert A. Spicer, Qiang Xu, Paul Valdes, Songlin He, Deng Zeng, Chao Wang, Zhenyu Li, Xudong Guo, Tao Su, Chenyuan Zhao, Houqi Wang, Yahui Yue

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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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 (Tw) decline at land surfaces as those surface rise. In this case, Tw 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.

Original language	English
Article number	abj0944
Journal	Science Advances
Volume	8
Issue number	6
DOIs	https://doi.org/10.1126/sciadv.abj0944
Publication status	Published - 9 Feb 2022

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© 2022 The Authors.

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title = "The rise and demise of the Paleogene Central Tibetan Valley",

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 (Tw) decline at land surfaces as those surface rise. In this case, Tw 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.",

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AU - Xiong, Zhongyu

AU - Liu, Xiaohui

AU - Ding, Lin

AU - Farnsworth, Alex

AU - Spicer, Robert A.

AU - Xu, Qiang

AU - Valdes, Paul

AU - He, Songlin

AU - Zeng, Deng

AU - Wang, Chao

AU - Li, Zhenyu

AU - Guo, Xudong

AU - Su, Tao

AU - Zhao, Chenyuan

AU - Wang, Houqi

AU - Yue, Yahui

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N2 - 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 (Tw) decline at land surfaces as those surface rise. In this case, Tw 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.

AB - 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 (Tw) decline at land surfaces as those surface rise. In this case, Tw 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.

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The rise and demise of the Paleogene Central Tibetan Valley

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