Preliminary study of crust-upper mantle structure of the Tibetan Plateau by using broadband teleseismic body waveforms

1993 ◽  
Vol 6 (2) ◽  
pp. 305-316 ◽  
Author(s):  
Lu-Pei Zhu ◽  
Rong-Sheng Zeng ◽  
Francis T. Wu ◽  
Thomas J. Owens ◽  
George E. Randall
Keyword(s):  
Tibetan Plateau ◽  
Upper Mantle ◽  
The Tibetan Plateau ◽  
Mantle Structure ◽  
Upper Mantle Structure ◽  
Preliminary Study

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>

Crustal and upper mantle structure of the Northeastern Tibetan Plateau imaged from EGM2008

2015 ◽  
Author(s):  
Benteng Bi ◽  
Xiangyun Hu ◽  
Liqing Li ◽  
Yingjie Peng ◽  
Xihan Li
Keyword(s):  
Tibetan Plateau ◽  
Upper Mantle ◽  
Mantle Structure ◽  
Northeastern Tibetan Plateau ◽  
Upper Mantle Structure

Lithospheric and upper mantle structure of the northeastern Tibetan Plateau

2012 ◽  
Vol 117 (B5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Han Yue ◽  
Y. John Chen ◽  
Eric Sandvol ◽  
James Ni ◽  
Thomas Hearn ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Upper Mantle ◽  
Mantle Structure ◽  
Northeastern Tibetan Plateau ◽  
Upper Mantle Structure

LASA anomalies and their relations to crust and upper-mantle structure

1970 ◽  
Author(s):  
H.M. Iyer ◽  
A.R. Jackson ◽  
J.H. Healy ◽  
T.E. Landers
Keyword(s):  
Upper Mantle ◽  
Mantle Structure ◽  
Crust And Upper Mantle ◽  
Upper Mantle Structure
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