10.6084/m9.figshare.3453839.v1
Xiao Liang
Xiao
Liang
Genhou Wang
Genhou
Wang
Guo-Li Yuan
Guo-Li
Yuan
Xiaochao Che
Xiaochao
Che
Mesozoic and Cenozoic deformations in the Raggyorcaka area, Tibet: implications for the tectonic evolution of the North Qiangtang
terrane
Geological Society of London
2016
Cretaceous
NW
Cenozoic deformations
Ma
II
thrust
Cenozoic tectonic evolution
North Qiangtang terrane
Cenozoic intraplate structures
episode
Mesozoic
fault
Triassic
Geology
2016-06-21 11:42:56
Journal contribution
https://geolsoc.figshare.com/articles/journal_contribution/Mesozoic_and_Cenozoic_deformations_in_the_Raggyorcaka_area_Tibet_implications_for_the_tectonic_evolution_of_the_North_Qiangtang___terrane/3453839
<p>The Mesozoic and Cenozoic deformations of the North Qiangtang terrane reflect a portion of the collisional tectonics of the
Tethys Ocean, involving Late Triassic, Early Cretaceous and Cenozoic intraplate structures of shallow to superficial tectonic
levels. The structural mapping of the Permian–Triassic structural layer indicates that the Mesozoic structural style is dominated
by Early Cretaceous horizontal contractional deformations characterized by NW–SE-trending thrust faults and flexural-slip
folds. These folds and thrusts were superimposed on Late Triassic buckle folds. Structural analysis of deformations of the
Neogene and Quaternary sedimentary layers indicates that there was an obvious transition in the Cenozoic tectonic evolution
of the North Qiangtang terrane, which can be divided into two deformation stages. In episode I (50–40 to 18 Ma), the crust
experienced large-scale north–south horizontal shortening and vertical thickening shown by buckle folds and thrust faults.
In episode II (18 Ma–present day), east–west passive extension formed conjugate strike-slip fault systems and pull-apart basins.
During episode II, the Qiangtang basin was extruded eastwards, and a number of superficial north–south-trending buckle folds
were formed.
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