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DOI

10.19076/mta.83774

Abstract

This paper explain research results for Holocene sedimentary processes and controlling factors on Datça and Hisarönü Bays located in south west Turkey. For this purpose, we collected sea bottom grab samples (upper 30 cm) from 71 stations and seismic profiles (we use only one sample explain to sedimentary process) collected in MTA-SELEN research ship on Hisarönü and Datça Bays. It is known and widely applied in seismic analysis methods and techniques are used on seismic profile which according to the continental shelf edge or threshold current -90 / -120 m water depth. At the same time, seismic profile were showed sea level changes of the Quaternary period and exhibits seismic facies parameters. According to radiocarbon dating calculations and we estimate these sediments which are 2694-14700 years of before present. Sediments grain size are 1-18% gravel, 7-85% sand, 6-69% silt and 2-30% clay size is composed of clastic material. Although silt and clay (mud) the most widely sediments are in our investigation area, we run into significant sand and gravel grain size important. We discuss regional differences grain size distribution and to be here residual (relic) sediments are in our investigation area. The total amount of heavy mineral-rich black sand is mostly below 2%, ophiolite and chromite-rich central and eastern regions is as high as 13%. Inorganic geochemistry of sediments are Mg, Cu, Ni and Fe amount is significant. Regional changing river drainage system, bay morphology, terrestrial and marine resources and outcrops also waves and currents effect not only sediment grain size distribution, but also effect the total heavy mineral content and the main elements composition.

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