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Paleogene India-Eurasia collision constrained by observed plate rotation
Xiaoyue Wu1,2,3, Jiashun Hu4, Ling Chen1,3
1State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029, Beijing, China.
Nature Communications
|November 10, 2023
Summary
The India-Eurasia collision
Area of Science:
- Geosciences
- Tectonics
- Plate Dynamics
Background:
- The Cenozoic India-Eurasia collision significantly shaped the Tibetan plateau.
- The early collision history is debated due to limited constraints.
Purpose of the Study:
- To investigate the timing and nature of the India-Eurasia collision.
- To reconcile plate reconstructions with geological observations.
Main Methods:
- Utilized fully dynamic three-dimensional numerical modeling.
- Analyzed two prominent counterclockwise rotation rate peaks of the Indian plate.
Main Results:
- The first rotation peak (52-44 Ma) indicates an initial diachronous collision.
- The second peak (33-20 Ma) signifies full collision and India-Eurasia coupling.
- Inferred initial collision at 55 ± 5 Ma and complete collision at 40 ± 5 Ma.
Conclusions:
- The collision history provides crucial insights into Tibetan plateau formation.
- The findings align with key geological observations, resolving controversies.
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