Moscow University Geology Bulletin

, Volume 72, Issue 1, pp 46–55 | Cite as

The relationships of thrust and shear deformations in the southern part of the Polar Urals as indicated by petromagnetic data

  • S. N. Sychev
  • R. V. Veselovskiy
  • A. K. Khudoley
  • K. V. Kulikova
Article
  • 36 Downloads

Abstract

Based on the petromagnetic characteristics of rocks that crop out within the Main Ural Fault zone (MUF) and Voykar–Synya ophiolites the multistage pattern of deformation processes in the study areas has been established. An analysis of the anisotropy of magnetic susceptibility of rock minerals detected the orientation, which allows us to reveal magnetic orientations in minerals recorded as a results of thrust (overthrust) and strike-slip deformations at an early stage of the evolution of the Ural orogenic belt. The main axes of the ellipsoid of anisotropy of the magnetic susceptibility (AMS) associated with regional thrusting, namely, the main stage of formation of the structure of the Urals, have rarely been revealed. This is evidence that thrust petrofabrics are almost completely veiled by superimposed shear deformations.

Keywords

magnetic susceptibility anisotropy Polar Urals Main Ural Fault ophiolites thrust faults strikeslip faults 

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Copyright information

© Allerton Press, Inc. 2017

Authors and Affiliations

  • S. N. Sychev
    • 1
  • R. V. Veselovskiy
    • 2
  • A. K. Khudoley
    • 1
  • K. V. Kulikova
    • 3
  1. 1.St. Petersburg State UniversitySt. PetersburgRussia
  2. 2.Department of GeologyMoscow State UniversityMoscowRussia
  3. 3.Institute of Geology, Komi Scientific CenterUral Branch of the Russian Academy of SciencesSyktyvkarRussia

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