Tectonic Evolution of the Tethyan Region pp 513-549 | Cite as
Tectonic Evolution of the Yangtze Tectonic Regime
Abstract
The Yangtze Tectonic Regime, bounded by several great faults, consists of three parts: West Sichuan Fold Belts, Yangtze Platform and South China Fold Belts. The Sichuan Basin Ancient Core covered with thick sedimentary sequences and considered as a oldest part of Yangtze Platform was expanded step by step by accreted wedges or belts composed of trench-arc-basin tectonic system, at it’s southeast during the Middle Proterozoic to the Cainozoic.
West-Sichuan Fold Belts as a tectonic block were collided with the Yangtze Platform in the late satge of the Proterozoic, when the accretion of Yangtze Island Chain took place. It underwent rifting and separating in Middle Proterozoic and recombined maybe by the Middle-Norian Movement.
There happened activation in Yangtze Platform and South China Fold Belts to the east of Longmenshan mainly owing to the affect of “Paleopacific Ocean Plate” from the east.
Keywords
Continental Crust Sichuan Basin Fold Belt Metamorphic Belt Tectonic BeltPreview
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