Eohimalayan metamorphism and subsequent tectonic quiescence explained

Sean Kelly,Christopher Beaumont,Rebecca A. Jamieson

Earth and Planetary Science Letters（2022）

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摘要

•Numerical model results provide explanations for Eohimalayan orogenesis.•Models show opening of Neotethys subduction channel and asthenospheric upwelling.•Upwelling heats Himalayan crust producing Early Eohimalayan 52-45 Ma metamorphism.•Mantle delamination leads to passive Indian northward motion and 45-30 Ma quiescence.•Radioactive heating assists metamorphism during Late Eohimalayan tectonic quiescence.

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关键词

Himalayan tectonics,geodynamic modeling,subduction channel opening,early Eohimalayan metamorphism,late Eohimalayan tectonic quiescence

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