Open AccessPaleostress reconstructions and structure of the Tuapse strike-slip fault
Author(s) -
А. В. Маринин,
T. Yu. Tveritinova
Publication year - 2016
Publication title -
vestnik moskovskogo universiteta. seriâ 4, geologiâ
Language(s) - English
Resource type - Journals
ISSN - 0579-9406
DOI - 10.33623/0579-9406-2016-1-41-55
Subject(s) - geology , cataclastic rock , seismology , principal stress , shear (geology) , stress field , tectonics , strike slip tectonics , fault (geology) , shear stress , slip (aerodynamics) , shear zone , petrology , physics , materials science , finite element method , composite material , thermodynamics
The results of the field structural studies of Northwest Caucasus Tuapse Shear Zone are presented. There are strike-slip displacements of different scale and the domination of horizontal shear conditions (type of geodynamic stress state that cause the formation of faults with mainly lateral movement of the wings along strike fault surface) within this zone. Using the method of cataclastic analysis of the collected geological paleostresses indicators the quantitative characteristics of the local stress states within the shear zone - position of the principal stresses axes and the Lode-Nadai coefficient - are identified. Differences of these characteristics considered for large tectonic zones. Significant spatial (territorial) variations of the orientations of the principal normal stresses axes identified within the shear zone, and their small smooth variations within local areas, which indicate on consistency of the general stress direction in the formation of studied fault structures in the Late Eocene-Miocene deformation period.