The relationships of thrust and shear deformations in the southern part of the Polar Urals as indicated by petromagnetic data
- Authors: Sychev S.N.1, Veselovskiy R.V.2, Khudoley A.K.1, Kulikova K.V.3
-
Affiliations:
- St. Petersburg State University
- Department of Geology
- Institute of Geology, Komi Scientific Center
- Issue: Vol 72, No 1 (2017)
- Pages: 46-55
- Section: Article
- URL: https://journals.rcsi.science/0145-8752/article/view/174369
- DOI: https://doi.org/10.3103/S0145875217010124
- ID: 174369
Cite item
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.
About the authors
S. N. Sychev
St. Petersburg State University
Author for correspondence.
Email: s.sychev@spbu.ru
Russian Federation, St. Petersburg, 199034
R. V. Veselovskiy
Department of Geology
Email: s.sychev@spbu.ru
Russian Federation, Moscow, 119991
A. K. Khudoley
St. Petersburg State University
Email: s.sychev@spbu.ru
Russian Federation, St. Petersburg, 199034
K. V. Kulikova
Institute of Geology, Komi Scientific Center
Email: s.sychev@spbu.ru
Russian Federation, Syktyvkar, 167982