The influence of a weak upper ductile detachment on the Longmen Shan fold-and-thrust belt (eastern margin of the Tibetan Plateau): Insights from sandbox experiments

2020 ◽  
Vol 198 ◽  
pp. 104220 ◽  
Author(s):  
Jian Cui ◽  
Dong Jia ◽  
Hongwei Yin ◽  
Zhuxin Chen ◽  
Yiquan Li ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
The Tibetan Plateau ◽  
Thrust Belt ◽  
Eastern Margin ◽  
Fold And Thrust Belt ◽  
Sandbox Experiments

scholarly journals Late Miocene Hinterland Crustal Shortening in the Longmen Shan Thrust Belt, the Eastern Margin of the Tibetan Plateau

2019 ◽  
Vol 124 (11) ◽  
pp. 11972-11991 ◽  
Author(s):  
Xiaoming Shen ◽  
Yuntao Tian ◽  
Guihong Zhang ◽  
Shimin Zhang ◽  
Andrew Carter ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
The Tibetan Plateau ◽  
Thrust Belt ◽  
Crustal Shortening ◽  
Eastern Margin ◽  
Longmen Shan Thrust Belt

Reconciling plate convergence and orogeny: The influence of India-Asia convergence rate on the formation of the Himalayas

2020 ◽  
Author(s):  
Ben S. Knight ◽  
Fabio A. Capitanio ◽  
Roberto F. Weinberg
Keyword(s):  
Tibetan Plateau ◽  
Numerical Models ◽  
The Tibetan Plateau ◽  
Thrust Belt ◽  
Plate Convergence ◽  
Structural Style ◽  
Fold And Thrust Belt ◽  
Velocity History ◽  
The Himalaya

<p>The collision of India and Eurasia since ~50 Ma has resulted in a broad range of deformation along the Himalaya-Tibetan orogeny, accommodating >2700 km of convergence. The region is characterised by the Tibetan Plateau, the Himalayan internal units and fold-and-thrust belt from North to South. These formed as a consequence of a convergence history characterised by a progressive decrease in velocity, from ~10 cm/yr 50 Ma, to ~8 cm/yr 42.5 Ma and to present-day values of ~4 cm/yr around 20 Ma. Here, we test the controls of such a convergence velocity history on the orogeny of a viscoplastic wedge during collision, above a subducting continental lithosphere. We compare numerical models simulating India-Asia plate convergence and collision, comparing the structures observed throughout the evolution with those observed in the Himalayan-Tibetan region. The models display distinct phases of growth and structural style evolution in the Himalayan-Tibetan region that are a result of the change in convergence velocity and long-term collision. After an initial stacking, the high convergence velocity forces deformation migration towards the upper plate, where a plateau forms, while late stage slowdown of collision favours the formation of the Himalayan fold-and-thrust belt. While the latter is in agreement with the structuring of the southermost domains and the South Tibetan Detachment (STD) fault, the former provide constraints to the initial uplift of the Tibetan Plateau.</p>

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