Factors affecting thickness and frequency of turbidites triggered by earthquakes in Kumburgaz Basin, Sea of Marmara

Submerged fault ruptures generate earthquake-triggered mass flow deposits, which are extensively used as a tool in subaqueous paleoseismology. In tectonically active deep sedimentary basins, such the Sea of Marmara (SoM), these deposits defined turbidite-homogenite units (THUs), consisting essentially coarse basal part and an overlying homogeneous mud (homogenite). Detailed characterization THUs is crucial order to establish meaningful criteria link with earthquakes events identify their transport routes depositional mechanisms. Here, we combine μ-X-ray Fluorescence (μ-XRF), Anisotropy Magnetic Susceptibility (AMS) additional rock magnetism analyses 21-m long piston core from Kumburgaz Basin SoM define upper stratigraphic boundary hemipelagic sediments investigate controls hydrological changes on turbidite frequency thickness over last 15 kyrs BP. The succession this period includes lower lacustrine marine unit two Holocene sapropel intervals. sequence interrupted by total 70 THUs, characterized significant magnetic foliation related setting rather than signature. mineralogy parts have more ferromagnetic particles homogenites background sediments. While homogenite constant parts, they do not differ Based event-free chronostratigraphic model derived radiocarbon ages published age lacustrine-marine (L-M) transition, average THU occurrence intervals (14.8–12.6 BP), (11.2–5.7 (5.4–2.7 BP) non-sapropelic (2.7 BP-present) 235 yrs., 287 114 yrs. 160 respectively. same 20.8 cm, 15.7 6.1 cm cm. variability thicknesses controlled sea level rise salinity increase following full connection at 12.6 BP, caused slope stability, sediment composition deposition different basin. Geomechanical properties appears been important resulting recurrence relatively high thicknesses.