A Bathymetric And Seismic Investigation Of Submarine Landslides In The Southwestern Black Sea

Date

2025-8-15

Author

Şimşek, Şeval

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Submarine landslides are one of the important geological processes that shape the seafloor and can cause significant hazards in marine environments. This study investigates submarine landslides in the southwestern Black Sea since the Last Glacial Maximum by analyzing high-resolution bathymetric and CHIRP seismic data to understand their morphological characteristics, movement types, formation mechanisms, and possible consequences. The analysis identified at least three different submarine landslides. The Northern Submarine Landslide and Southern Submarine Landslides are interpreted as rotational, slope-attached, and frontally emergent landslides. Additional scarps observed in the southern zone suggest the presence of multiple slope failures, indicating that it may be part of a complex landslide system. The Deeper Submarine Landslide, located in the canyon and ridge region, is classified as a debris flow, detachment-type, and frontally confined landslide. Morphological and seismic evidence suggest that the Northern and Southern Submarine Landslides occurred simultaneously, while the Deeper Submarine Landslide formed more recently. Gas accumulation is considered the primary triggering mechanism, while rapid sedimentation and regional seismic activities are regarded as secondary triggers. Considering the size and volume, these landslides are considered to have the capacity to generate tsunamis.

Subject Keywords

Submarine Landslides, Southwestern Black Sea, High Resolution Seismic

URI

https://hdl.handle.net/11511/117411

Collections

Graduate School of Marine Sciences, Thesis