Interpretation of the tectonic evolution of the western part of the Sava Depression: structural analysis of seismic attributes and subsurface structural modeling

ABSTRACT This paper presents the results of an extensive structural investigation of the western part of the Sava Depression (SW part of the Pannonian Basin System) and provides insights in the tectonic evolution of the investigated area. Structural analyses were based on the 3D seismic volume of the study area, analysis of seismic attributes, and construction of 3D structural model and structural maps. Our results pinpoint to three tectonic phases in the structural development of the Sava Depression. The first tectonic phase is characterized by extensional tectonic features developed from the Early to Middle Miocene. The second tectonic phase follows thermal subsidence and general deepening of the study area and inherited tectonic features during the Late Miocene, while the final tectonic phase is characterized by structural reactivation and tectonic inversion of inherited and newly formed tectonic features from the Pliocene to the Quaternary