SEDIMENTOLOGICAL AND GEOCHEMICAL DYNAMICS OF EASTERN EDREMIT BAY DURING HOLOCENE

Date

2025-1-7

Author

Kartal, Pir Çağatay

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Comprehensive field and laboratory investigations were carried out to explain the relationships between sedimentation, tectonic activity, and climatic conditions in the Edremit Bay (Gulf of Edremit) during the Late Pleistocene to Holocene periods. For this purpose, a total of 60 marine core samples collected from the Edremit Bay (Gulf of Edremit) in 2019 using the MTA R/V Selen. The cores were subjected to analyses including ITRAX-XRF, magnetic susceptibility (MS), radiocarbon dating, grain size, δ¹⁸O mass spectrometry, and total organic carbon analysis. These analyses have yielded significant insights into the region's paleoenvironmental and paleoceanographic history. The findings from the analyses align with global-scale Meltwater Pulses (MWPs), occurring between the Bølling–Allerød period (approximately 14,690 years ago) and the Holocene Warm Period (around 8,000 years ago). Additionally, the findings align with local-scale climatic results obtained from the Sofular Cave and cores from the northern Aegean Sea. It has been observed that the presence of terrestrial sedimentation in the basin, indicated by elements such as Fe, Ti, and K, is closely related to variations in magnetic susceptibility data and grain size changes. The Fe/Mn ratio has been used to make interpretations regarding changes in bottom water oxygen levels. Variations in grain size were strongly linked to submarine morphology features (e.g., paleo-channels, faults) and sea-level fluctuations, offering valuable insights into the evolution of sedimentation dynamics within the basin. Based on these findings, a geological model was developed to explain the interplay of tectonic, climatic, and sedimentary processes that have shaped the Edremit Bay basin over time.

Subject Keywords

Edremit Bay, Marine Core Sample, Paleoclimate, Paleoceanography, Sedimentation Dynamics

URI

https://hdl.handle.net/11511/113394

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Graduate School of Natural and Applied Sciences, Thesis