贝加尔裂谷构造发育的主控因素：基于地球动力学数值模拟

王盟楠; 李江海

doi:10.3799/dqkx.2022.113

Volume 49 Issue 1

Jan. 2024

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Wang Mengnan, Li Jianghai, 2024. Main Controlling Factors of Structure of Baikal Rift: Based on Geodynamic Numerical Simulation. Earth Science, 49(1): 29-39. doi: 10.3799/dqkx.2022.113

Citation:

Wang Mengnan, Li Jianghai, 2024. Main Controlling Factors of Structure of Baikal Rift: Based on Geodynamic Numerical Simulation. Earth Science, 49(1): 29-39. doi: 10.3799/dqkx.2022.113

Wang Mengnan, Li Jianghai, 2024. Main Controlling Factors of Structure of Baikal Rift: Based on Geodynamic Numerical Simulation. Earth Science, 49(1): 29-39. doi: 10.3799/dqkx.2022.113

Citation:

Wang Mengnan, Li Jianghai, 2024. Main Controlling Factors of Structure of Baikal Rift: Based on Geodynamic Numerical Simulation. Earth Science, 49(1): 29-39. doi: 10.3799/dqkx.2022.113

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Main Controlling Factors of Structure of Baikal Rift: Based on Geodynamic Numerical Simulation

doi: 10.3799/dqkx.2022.113

Wang Mengnan^,,
Li Jianghai

School of Earth and Space Sciences, Peking University, Beijing 100871, China

Received Date: 2022-01-21
Available Online: 2024-01-24
Publish Date: 2024-01-25

Abstract

Abstract

The Baikal rift is located in the convergent zone of the Siberian craton and Sayan-Baikal belt. There are obvious differences in the lithospheric structure and rheological property between the two sides of the rift, and the regional tectonic evolution is complex. Here it investigate the influence of rheological property of the lower crust and preexisting weak zone on the evolution of the Baikal rift using numerical simulation. The results show that the difference in the rheology of the lower crust on both sides of the rift extension center leads to the propagation of stress to the Sayan-Baikal belt, in which large-scale listric faults mainly develop on the Sayan-Baikal belt side, while small-scale high-angle normal faults mainly develop on the cratonic side. If there is a weak zone in the suture zone of lithosphere, the transfer of stress to the side of the Sayan-Baikal belt is limited, resulting in a reduced scale of faulting on the side of Sayan-Baikal belt, and the development of the asymmetric structure of "narrow and deep depression".
- Baikal Rift,
- rheology of lower crust,
- weak zone,
- structural development,
- numerical modeling,
- structural geology

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References(47)

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