Shallow-generated damage within non-planar strike-slip fault zones: role of sedimentary rocks in slip accommodation, SW Holy Cross Mountains, Poland

We investigated exhumed damage zones of dextral strike-slip faults dissecting the south-western part of the Mesozoic cover of the Late Palaeozoic Holy Cross Mountains Fold Belt. Structural observations allow to examine the top 1–2 km of the fault zones that deformed asymmetrically with the most inte...

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Bibliographic Details
Published in:International journal of earth sciences : Geologische Rundschau 2017-09, Vol.106 (6), p.1863-1888
Main Authors: Rybak-Ostrowska, Barbara, Konon, Andrzej, Domonik, Andrzej, Poszytek, Anna, Uroda, Joanna
Format: Article
Language:English
Subjects:
Basins
Bends
Calcite
Damage patterns
Deformation
Earth and Environmental Science
Earth Sciences
Earthquake damage
Edge dislocations
Fault lines
Fault zones
Faults
Geochemistry
Geological faults
Geology
Geophysics/Geodesy
Mesozoic
Mineral Resources
Modes
Mountains
Original Paper
Palaeozoic
Paleozoic
Porosity
Roughness
Sandstones
Sedimentary geology
Sedimentary rocks
Sedimentology
Shear bands
Slip
Strike-slip faults
Structural damage
Structural Geology
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Summary:We investigated exhumed damage zones of dextral strike-slip faults dissecting the south-western part of the Mesozoic cover of the Late Palaeozoic Holy Cross Mountains Fold Belt. Structural observations allow to examine the top 1–2 km of the fault zones that deformed asymmetrically with the most intense damage controlled by the non-planar geometry of the faults. The deformational style of fault zones and the roughness of slip surfaces on subsidiary faults within deflections of fault traces in the restraining and releasing bends were facilitated by rock fabric and porosity. High porous sandstones enhanced genesis of cataclastic shear bands within the damage zone and the smooth slip surfaces. Low porous limestones enhanced the formation of dilatant structures infilled with calcite within damage zones and rough slip surfaces. The complex structural pattern of damage zones records multiple episodes of slip and shows evidence of continuous seismic–aseismic modes of fault slip behaviour.
ISSN:1437-3254
1437-3262
DOI:10.1007/s00531-016-1390-4