The geological and geodynamic evolution of the eastern Black Sea basin: insights from 2-D and 3-D tectonic modelling

摘要: Abstract Subsidence mechanisms that may have controlled the evolution of eastern Black Sea been studied and simulated using a numerical model integrates structural, thermal, isostatic surface processes in both two- (2-D) three-dimensions (3-D). The enables forward modelling extensional basin followed by deformation due to subsequent compressional events. Seismic data show has evolved via sequence interrelated tectonic events began with early Tertiary rifting several phases compression, mainly confined edges basin. A large magnitude (approximately 12 km) regional subsidence also occurred central throughout Tertiary. Models simulate observed fault extension (β=1.13) do not reproduce total depth Similarly, around does little enhance approach quantifies lithosphere according amount crustal thinning thickening across provides closest match overall subsidence. shows deep mantle–lithosphere can significantly influence rate syn- post-rift such played an important role forming anomalously thin syn-rift thick Miocene–Quaternary sequences It is suggested 40–45 km pre-rift crust required generate when considering realistic bathymetry.