New data on the structure of Permian-Triassic Complex of the Ustyurt Plateau, Uzbekistan

Abstract

The tectonic features of the Permian-Triassic Complex in the Ustyurt Plateau are considered on the basis of up-to-date seismic exploration methods against the background of a regional structural review. The peculiar structural style of the complex under consideration is characterized by the following attributes: the widespread Permian-Triassic faults that control block tectonics; the leading role of grabens various in morphology among negative paleostructures; the critical role of pre-Upper Permian rejuvenated faults in localization of grabens; the predominant extension of the Earth’s crust during origin and development of grabens and subsequent shortening; the appearance of an inversion of the Permian-Triassic graben, deepest in region; the posthumous local uplifts formed in Permian-Triassic and Jurassic-Cenozoic. The morphological typification of graben-like paleotroughs of the transitional stage has been proposed. This stage predates typical platform regime at the young platforms.

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Correspondence to N. A. Krylov.

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Original Russian Text © N.A. Krylov, A.Ya. Grizik, 2015, published in Geotektonika, 2015, No. 4, pp. 54–66.

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Krylov, N.A., Grizik, A.Y. New data on the structure of Permian-Triassic Complex of the Ustyurt Plateau, Uzbekistan. Geotecton. 49, 291–301 (2015). https://doi.org/10.1134/S0016852115030024

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Keywords

  • Ustyurt
  • Permian-Triassic
  • transitional complex
  • paleostructure
  • fault
  • paleorift
  • taphrogen
  • inversion