TECTONIC SLICKENSIDES AND FAULT GOUGE AS MARKERS OF MECHANICAL INSTABILITY IN FAULT ZONES OF DIFFERENT DEPTH LEVELS
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Geophysical research
Tome: 25
Number: 4
Year: 2024
Pages: 5-36
UDK: 552.164; 543.42
DOI: 10.21455/gr2024.4-1
Show citation
Morozov
M.A Yu.A. TECTONIC SLICKENSIDES AND FAULT GOUGE AS MARKERS OF MECHANICAL INSTABILITY IN FAULT ZONES OF DIFFERENT DEPTH LEVELS
// . 2024. Т. 25. № 4. С. 5-36. DOI: 10.21455/gr2024.4-1
@article{Morozov
M.ATECTONIC2024,
author = "Morozov
M.A, Yu. A.",
title = "TECTONIC SLICKENSIDES AND FAULT GOUGE AS MARKERS OF MECHANICAL INSTABILITY IN FAULT ZONES OF DIFFERENT DEPTH LEVELS
",
journal = "Geophysical research",
year = 2024,
volume = "25",
number = "4",
pages = "5-36",
doi = "10.21455/gr2024.4-1",
language = "English"
}
Copy link
Copy BibTex
Keywords: slickensides, fault gouge, upper transition zone from aseismic to seismic regime, thermal energy balance, mechanochemical reactions, seismic displacement, creep.
Аnnotation: The issues of the rock composition influence and the depth level of dynamic mobility implementation on its geomechanical regime are considered on a number of natural examples from terrigenous, metamorphic and magmatic complexes of different ages and geostructural positions through the study of fault gouge and films of slickensides. The features of rock substance transformation in weakly lithified strata of the near-surface part of the crust and in consolidated rock differences of a slightly deeper level in the transition zone from aseismic to seismogenic behavior of faults are estimated. The consequences of mechanochemical transformations of rocks of different composition, changes in the thermodynamic parameters of metamorphic reactions, their volumetric effects and thermal energy orientation, as well as the influence of mineral-phase and structural-textural rearrangements on the mechanical instability of the displacement zone, its strengthening or weakening during dynamic development are shown. The structural and material markers of stable, aseismic slip along the fault and unstable seismogenic displacement are characterized.