THE ROLE OF MULTIPLE WEAK LITHOLOGIES IN THE DEFORMATION OF COVER UNITS IN THE NORTHWESTERN SEGMENT OF THE ZAGROS FOLD‐AND‐THRUST BELT

The geometry, kinematics and dynamics of fold-and-thrust belts are strongly influenced by the mechanical behaviour basal décollement. However, many also include mechanically weak lithologies such as evaporites marls or mudstones at different levels within shortened stratigraphy. dynamic evolution these thrust controlled both décollement units embedded overlying stratigraphic succession. In Zagros belt (ZFTB), sedimentary cover is between 7 12 km thick compartmentalize column shallow intermediate levels. this paper, satellite, field seismic data from Kurdistan Region Iraq used to identify structures sizes surface traces. observations underline role horizons stratigraphy decoupling deformation laterally with depth in belt. deeper observed profiles reported Iranian part belt, where folds traces occur. Decoupling deep layers incompetent depths (e.g. marls, evaporites) results formation disharmonic folds. size location may differ outcropping subsurface structures. have a significant impact on hydrocarbon exploration parts due potential offsets their associated traps.