The origin and dating of late Pleistocene alluvial fan deposits in the east of Çanakkale using OSL: Preliminary results

Öz

In this paper, fluvial deposits overlying Upper Miocene formations, located in 5 km northeast of Çanakkale city, was investigated using Optically Stimulated Luminescence (OSL) method and deposition age of the sequence was determined from quartz sands collected from three levels of the reference site. Based on petrographic composition and stratigraphic characteristics, alluvial materials might have accumulated as the combination of hyperconcentrated flow deposits, cohesive debris flow deposits and floodplain deposits. Accordingly, it seems disputable to assume these accumulations as former terrace deposits of the Sarıçay Stream. Dating results showed that sedimentation started at 100.4 ± 6.6 ka BP over the Upper Miocene formations and ended at 39.1± 2.5 ka BP.

Keywords: Optically Stimulated Luminescence, Fluvial deposits, Dating, Strait of Çanakkale, Çanakkale

Anahtar Kelimeler

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Çanakkale Doğusundaki Geç Pleistosen Alüvyal Çökellerin Kökeni ve OSL Yöntemi ile Tarihlendirilmesi: Ön Sonuçlar

Öz

Bu çalışmada, Çanakkale’nin 5 km kuzeydoğusunda Üst Miyosen formasyonlarını uyumsuz olarak örten akarsu çökelleri Işık Uyarımlı Lüminisans (OSL) yöntemi ile incelenmiş ve seçilen referans istifin 3 farklı seviyesinden alınan kuvars kumu örneklerinden çökel birikim yaşı belirlenmiştir. İstifin petrografik bileşimi ve stratigrafik özelliklerine göre çökelme aşırı doygun akma, moloz akması ve taşkın düzlüğünde asılı malzemenin durulması şeklinde gerçekleşmiş olmalıdır. Buna göre istifin genel bir ifade ile Sarıçay’ın eski taraça dolguları olarak tanımlanması şüphelidir. Tarihlendirme verilerine göre Miyosen formasyonları üzerine sedimantasyon günümüzden 100.4 ± 6.6 bin yıl önce başlamış ve 39.1± 2.5 bin yıl önce sona ermiştir.

Anahtar Sözcükler: Işık Uyarımlı Lüminesan, Akarsu çökelleri, Tarihlendirme, Çanakkale Boğazı, Çanakkale

Anahtar Kelimeler

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Kaynakça

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