Global Tectonic Background during the Late Paleozoic Convergence of Pangea: Discussion of Plate Vortex Trajectory
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    Abstract:

    Since the formation of plate tectonic theory, the relativity between different plates are described deeply. However, movement process during the convergence of a series of plates are often overlooked. Based on global paleomagnetic data and plate reconstruction, paleolocation and motion trajectory can be obtained. The plate’s motion trajectory indicates that major continents converged to the northern mid-latitudes during Silurian Period (about 443Ma) - Permian (about 250Ma). It displays as: global plate motion have a characteristic of clockwise rotation during the formation of Pangea. And larger plates (South America, Baltic, Siberia, Australia, etc.) significantly showed a higher paleolatitude movement rate and rotation rate than smaller blocks(North China, Tarim, Yangtze block, etc.). Trajectory of some major plates and continental blocks shows an asymmetric “e” type with a clockwise rotation. Central Asia is the convergent center with a symbol of Kazakhstan orocline. The scroll-shaped trajectory is controlled by long-term vortex motion in the upper mantle. This convective motion kept a relatively steady in a certain period of time (late Paleozoic), leading to the formation of Pangea.

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lijianghai, liweibo, wanghonghao, maoxiang, YANG Jingyi, FU.2014. Global Tectonic Background during the Late Paleozoic Convergence of Pangea: Discussion of Plate Vortex Trajectory[J]. Acta Geologica Sinica,88(6):980-991

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History
  • Received:December 23,2012
  • Revised:August 29,2013
  • Adopted:June 24,2014
  • Online: July 08,2014
  • Published: