Finite element modelling of inter-seismic deformation associated with
Arabia-Eurasia plate convergence in western Lurestan (Iran)
Abstract
The Zagros thrust belt formed due to the convergence between the Arabian
and Eurasian plates during the closure of the Neo-Tethys Ocean. GPS
measurements show that the northward relative motion of the Arabian
Plate is still active today. This active drift produces high-magnitude
earthquakes along the Zagros thrust belt, such as the Iran-Iraq border
seismic event of November 12, 2017 (Mw = 7.3), nucleated along the
“Mountain Front Fault”. The aim of this work is to study the
inter-seismic and co-seismic deformation that eventually leads to the
nucleation of important seismic events in the study area. A 2-D finite
element model has been performed starting from published geological
sections and relevant seismological datasets, integrated with
geo-mechanical parameters of the rocks. The results of finite element
modeling (FEM), including predicted uplift pattern and rate along the
analysed crustal section, are compared with a tectonic geomorphology
analysis in order to unravel the most reliable tectonic scenario for the
active tectonic setting of the study area.