Influence of mantle convection to the crustal movement pattern in the northeastern margin of the Tibetan Plateau based on numerical simulation

2018 ◽  
Vol 61 (11) ◽  
pp. 1644-1658 ◽  
Author(s):  
Aiyu Zhu ◽  
Dongning Zhang ◽  
Tao Zhu ◽  
Yingxing Guo
Keyword(s):  
Numerical Simulation ◽  
Tibetan Plateau ◽  
Mantle Convection ◽  
Movement Pattern ◽  
Crustal Movement ◽  
The Tibetan Plateau

Mantle convection beneath East Asia under global mantle convection spherical framework

2020 ◽  
Author(s):  
Qunfan Zheng ◽  
Huai Zhang
Keyword(s):  
Tibetan Plateau ◽  
East Asia ◽  
Upper Mantle ◽  
Mantle Convection ◽  
Mantle Flow ◽  
The Tibetan Plateau ◽  
Mantle Structure ◽  
Lithospheric Deformation ◽  
Mantle Dynamics ◽  
Flow Models

<p>East Asia is a tectonically active area on earth and has a complicated lithospheric deformation due to the western Indo-Asian continental collision and the eastern oceanic subduction mainly from Pacific plate. Till now, mantle dynamics beneath this area is not well understood due to its complex mantle structure, especially in the framework of global spherical mantle convection. Hence, a series of numerical models are conducted in this study to reveal the key controlling parameters in shaping the present-day observed mantle structure beneath East Asia under 3-D global mantle flow models. Global mantle flow models with coarse mesh are firstly applied to give a rough constraint on global mantle convection. The detailed description of upper mantle dynamics of East Asia is left with regional refined mesh. A power-law rheology and absolute plate field are applied subsequently to get a better constraint on the related regional mantle rheological structure and surficial boundary conditions. Thus, the refined and reasonable velocity and stress distributions of upper mantle beneath East Asia at different depths are retrieved based on our 3-D global mantle flow simulations. The derived large shallow mantle flow beneath the Tibetan Plateau causes significant lithospheric shear drag and dynamic topography that result in prominent tectonic evolution of this area. And the Indo–Asian collision may have induced mantle flow beneath the Indian plate and the different velocity structures between the asthenosphere and lithosphere indicate the shear drag of asthenospheric mantle. That may explain the reason that Indo–Asian collision has occurred for 50 Ma, and this collision can still continue to accelerate uplift in the Tibetan plateau. Finally, we also consider the possible implementations of 3-D numerical simulations combined with global lithosphere and deep mantle dynamics so as to discuss the relevant influences.</p>

scholarly journals THE NUMERICAL SIMULATION OF ASTRO-CLIMATE CONDITIONS OVER THE TIBETAN PLATEAU

2015 ◽  
Vol 30 (2) ◽  
pp. 695-697
Author(s):  
XUAN QIAN ◽  
YONGQIANG YAO ◽  
HONGSHUAI WANG ◽  
LIYONG LIU
Keyword(s):  
Numerical Simulation ◽  
Tibetan Plateau ◽  
The Tibetan Plateau ◽  
Climate Conditions

scholarly journals Numerical Simulation of the Carbon Cycle Over The Tibetan Plateau, China

2007 ◽  
Vol 39 (4) ◽  
pp. 723-731 ◽  
Author(s):  
Guangzhou Fan ◽  
Tingjun Zhang ◽  
Jinjun Ji ◽  
Kerang Li ◽  
Jiyuan Liu
Keyword(s):  
Numerical Simulation ◽  
Tibetan Plateau ◽  
Carbon Cycle ◽  
The Tibetan Plateau

Geological and Geomorphological Evidence for Activity along the Motuo Fault, Eastern Side of the Namche Barwa Syntaxis, Tibetan Plateau

2021 ◽  
Author(s):  
Chao Xie ◽  
Bengang Zhou ◽  
Fan Yang ◽  
Zhengfang Li ◽  
Yueju Cui ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Quaternary ◽  
Movement Pattern ◽  
Strike Slip ◽  
The Tibetan Plateau ◽  
Southeastern Part ◽  
Strong Activity ◽  
Lateral Strike Slip ◽  
Namche Barwa ◽  
Late Pleistocene To Holocene

Abstract The Motuo fault (MTF) strikes along the Yarlung Zangbo suture zone on the eastern boundary of the Namche Barwa syntaxis. The movement pattern and Quaternary activity of the MTF remain unclear, which hampers efforts to undertake meaningful seismic hazard assessments near the southeastern part of the Tibetan plateau and to understand the tectonic evolution of the Namche Barwa syntaxis. In this study, the MTF is shown to feature left-lateral strike-slip movements with offset gullies and mountain ridges and appears to have ruptured during the late Pleistocene to Holocene, as evidenced from geological, paleoseismic, and radiocarbon dating investigations. Specifically, at least three surface-rupturing paleoseismic events are revealed; two events occurred after 2606 B.P. and after 18.2 ka. Combining this information with previous Global Positioning System results in southeastern Tibet, we suggest that, as a boundary fault, the MTF regulates the movements of the Namche Barwa and Chayu blocks. The velocity difference between the two blocks advancing to the north is the main mechanism of left-lateral strike-slip motion along the MTF. The accumulation and release of shear stress between the two blocks have led to strong activity along the MTF, since the late Quaternary.

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