TY - JOUR
T1 - The influence of back-arc extension direction on the strain partitioning associated with continental indentation: Analogue modelling and implications for the Circum-Moesian Fault System of South-Eastern Europe
AU - Krstekanic, Nemanja
AU - Willingshofer, Ernst
AU - Matenco, Liviu
AU - Toljic, Marinko
AU - Stojadinovic, Uros
N1 - Funding Information:
This research is part of a collaboration between the Department of Earth Sciences of Utrecht University , the Netherlands and the Faculty of Mining and Geology, University of Belgrade, Serbia during the PhD of Nemanja Krstekanić and is funded by the Netherlands Research Centre for Integrated Solid Earth Science ( ISES ). The modelling work was performed in the Tectonic Modelling Laboratory (TecLab) of Earth Simulation Laboratory of the Utrecht University. We thank Giovanni Toscani and an anonymous reviewer for their detailed and constructive comments and suggestions that improved the original version of the manuscript.
Funding Information:
This research is part of a collaboration between the Department of Earth Sciences of Utrecht University, the Netherlands and the Faculty of Mining and Geology, University of Belgrade, Serbia during the PhD of Nemanja Krstekanić and is funded by the Netherlands Research Centre for Integrated Solid Earth Science (ISES). The modelling work was performed in the Tectonic Modelling Laboratory (TecLab) of Earth Simulation Laboratory of the Utrecht University. We thank Giovanni Toscani and an anonymous reviewer for their detailed and constructive comments and suggestions that improved the original version of the manuscript.
Publisher Copyright:
© 2022 The Authors
PY - 2022/6
Y1 - 2022/6
N2 - Continental indentation is associated with deformation transfer from shortening to strike-slip faulting and is often affected by subduction related processes such as slab roll-back driven back-arc extension. We use crustal-scale analogue modelling to investigate the effects of extension direction on the strain partitioning and deformation transfer during indentation. The modelling results show that extension parallel to the strike-slip margin of the indenter creates subsidence distributed in several areas which may connect to form a large sedimentary basin behind the indenter. This transtensional basin with v-shape geometry narrows gradually towards the strike-slip margin of the indenter. In contrast, models with extension perpendicular to the strike-slip margin distributes transtensional deformation away from the indenter. Our results are in good correlation with the evolution of the Carpatho-Balkanides orocline of South-Eastern Europe, where the Circum-Moesian Fault System accommodates oroclinal bending during indentation against the Moesian Platform. In this area, the modelling explains the coeval and contrasting extensional features observed along the strike-slip margin and behind the indenter (i.e. the Getic Depression and the Morava Valley Corridor), driven by the roll-back of the Carpathian embayment and Adriatic slabs.
AB - Continental indentation is associated with deformation transfer from shortening to strike-slip faulting and is often affected by subduction related processes such as slab roll-back driven back-arc extension. We use crustal-scale analogue modelling to investigate the effects of extension direction on the strain partitioning and deformation transfer during indentation. The modelling results show that extension parallel to the strike-slip margin of the indenter creates subsidence distributed in several areas which may connect to form a large sedimentary basin behind the indenter. This transtensional basin with v-shape geometry narrows gradually towards the strike-slip margin of the indenter. In contrast, models with extension perpendicular to the strike-slip margin distributes transtensional deformation away from the indenter. Our results are in good correlation with the evolution of the Carpatho-Balkanides orocline of South-Eastern Europe, where the Circum-Moesian Fault System accommodates oroclinal bending during indentation against the Moesian Platform. In this area, the modelling explains the coeval and contrasting extensional features observed along the strike-slip margin and behind the indenter (i.e. the Getic Depression and the Morava Valley Corridor), driven by the roll-back of the Carpathian embayment and Adriatic slabs.
KW - Analogue modelling
KW - Strain partitioning
KW - Strike-slip faulting
KW - Bi-directional extension
KW - Circum-Moesian fault system
UR - http://www.scopus.com/inward/record.url?scp=85128551720&partnerID=8YFLogxK
U2 - 10.1016/j.jsg.2022.104599
DO - 10.1016/j.jsg.2022.104599
M3 - Article
SN - 0191-8141
VL - 159
SP - 1
EP - 16
JO - Journal of Structural Geology
JF - Journal of Structural Geology
M1 - 104599
ER -