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No mafic layer in 80 km thick Tibetan crust.

ABSTRACT: All models of the magmatic and plate tectonic processes that create continental crust predict the presence of a mafic lower crust. Earlier proposed crustal doubling in Tibet and the Himalayas by underthrusting of the Indian plate requires the presence of a mafic layer with high seismic P-wave velocity (Vp?>?7.0?km/s) above the Moho. Our new seismic data demonstrates that some of the thickest crust on Earth in the middle Lhasa Terrane has exceptionally low velocity (Vp?

SUBMITTER: Wang G 

PROVIDER: S-EPMC7886915 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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No mafic layer in 80 km thick Tibetan crust.

Wang Gaochun G   Thybo Hans H   Artemieva Irina M IM  

Nature communications 20210216 1

All models of the magmatic and plate tectonic processes that create continental crust predict the presence of a mafic lower crust. Earlier proposed crustal doubling in Tibet and the Himalayas by underthrusting of the Indian plate requires the presence of a mafic layer with high seismic P-wave velocity (V<sub>p</sub> > 7.0 km/s) above the Moho. Our new seismic data demonstrates that some of the thickest crust on Earth in the middle Lhasa Terrane has exceptionally low velocity (V<sub>p</sub> < 6.7  ...[more]

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