Linking deeply-sourced volatile emissions to plateau growth dynamics in southeastern Tibetan Plateau

Maoliang Zhang (), Zhengfu Guo (), Sheng Xu (), Peter H. Barry, Yuji Sano, Lihong Zhang, Sæmundur A. Halldórsson, Ai-Ti Chen, Zhihui Cheng, Cong-Qiang Liu, Si-Liang Li, Yun-Chao Lang, Guodong Zheng, Zhongping Li, Liwu Li and Ying Li
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Maoliang Zhang: Tianjin University
Zhengfu Guo: Chinese Academy of Sciences (CAS)
Sheng Xu: Tianjin University
Peter H. Barry: Woods Hole Oceanographic Institution
Yuji Sano: Tianjin University
Lihong Zhang: Tianjin Chengjian University
Sæmundur A. Halldórsson: University of Iceland
Ai-Ti Chen: National Taiwan University
Zhihui Cheng: Sun Yat-sen University
Cong-Qiang Liu: Tianjin University
Si-Liang Li: Tianjin University
Yun-Chao Lang: Tianjin University
Guodong Zheng: Chinese Academy of Sciences
Zhongping Li: Chinese Academy of Sciences
Liwu Li: Chinese Academy of Sciences
Ying Li: China Earthquake Administration

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract The episodic growth of high-elevation orogenic plateaux is controlled by a series of geodynamic processes. However, determining the underlying mechanisms that drive plateau growth dynamics over geological history and constraining the depths at which growth originates, remains challenging. Here we present He-CO2-N2 systematics of hydrothermal fluids that reveal the existence of a lithospheric-scale fault system in the southeastern Tibetan Plateau, whereby multi-stage plateau growth occurred in the geological past and continues to the present. He isotopes provide unambiguous evidence for the involvement of mantle-scale dynamics in lateral expansion and localized surface uplift of the Tibetan Plateau. The excellent correlation between 3He/4He values and strain rates, along the strike of Indian indentation into Asia, suggests non-uniform distribution of stresses between the plateau boundary and interior, which modulate southeastward growth of the Tibetan Plateau within the context of India-Asia convergence. Our results demonstrate that deeply-sourced volatile geochemistry can be used to constrain deep dynamic processes involved in orogenic plateau growth.

Date: 2021
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DOI: 10.1038/s41467-021-24415-y

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