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

Abstract

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

Keywords

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

Abstract

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

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References

1. BØTTER-JENSEN, L., BULUR, E., DULLER, G.A.T., MURRAY, A.S., 2000. “Advances in luminescence instrument systems”. Radiation Measurements 32: 523-528.
2. CHAPPELL, J., SHACKLETON, N.J., 1986. “Oxygen isotopes and sea level”. Nature 324: 137-140.
3. EROL, O., 1969. “Çanakkale Boğazı çevresinin jeomorfolojisi hakkında ön not.. A preliminary report on the geomorphology of the Çanakkale area, Dardanelles, Turkey”. Coğrafya Araştırmaları Dergisi 2: 53-71.
4. EROL, O., 1985. “Çanakkale yöresi güney kesiminin jeomorfolojisi”. Jeomorfoloji Dergisi 13: 1-7.
5. EROL, O., İNAL, A., 1980. “Çanakkale yöresi Karacaviran Köyü çevresindeki Kuaterner depoları ve denizel fosilleri. Quaternary deposits and marine fossils at the North of the Karacaviran Village in the Dardanelles area, Turkey”. Jeomor- foloji Dergisi 9: 1-35.
6. FAIRBANKS, R.G., 1989. “A 17000-year glacio-eustatic sea level record: infuence of glacial melting rates on the Younger Dryas event and deep-ocean circulation”. Nature 342: 637-642.
7. MURRAY, A.S., WINTLE, A.G., 2000. “Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol”. Radiation Measurements 32, 57-73.
8. OLLEY, J.M, MURRAY, A.S., ROBERT, R.G., 1996. The effects of disequilibria in the uranium and thorium decay chain on burial dose rates in fluvial sediments. Quaternary Science Reviews 15: 751-760.

9. PIERSON, T.C., COSTA, J.E., 1987. “A rheologic classification of subaerial sediment– water flows”. Debris Flows/Avalanches: Process, Recognition, and Mitigation (Eds. Costa, J.E., Wieczorek, G.F.). Reviews in Engineering Geology, vol. 7. Geological Society of America, pp. 1 – 12.
10. PRESCOTT, J.R., HUTTON, J.T., 1988. “Cosmic ray and gamma ray dosimetry for TL and ESR”. Nuclear Tracks Radiation Measurements 14: 223-227.
11. PRESCOTT, J.R., HUTTON, J.T., 1994. Cosmic ray contribution to dose rates for luminescence and ESR dating: large depths and long-term time variations. Radiation Measurements 23: 497-500.
12. SAKINÇ, M., YALTIRAK, C., 1997. “Trakya’nın güney sahillerinin Pleyistosen paleocoğrafyası ve evrimi”. MTA Dergisi 119: 43-62.
13. SCOTT, K.M., VALLANCE, J.W., PRINGLE, P.T., 1995. Sedimentology, behavior and hazards of debris flows at Mount Rainier, Washington. U.S. Geol. Surv., Prof. Pap. 1547.
14. SKENE, K.I., PIPER, D.J.W., AKSU, A.E., SYVITSKI, J.M.P., 1998. “Evaluation of the global oxygen isotope curve as a proxy for Quaternary sea level by modelling of delta progradation”. Journal of Sedimentary Research 68: 1077- 1092.
15. SMITH, G.A., 1986. “Coarse-grained nonmarine volcaniclastic sediment: terminology and depositional process”. Geological Society of America Bulletin 97, 1 –10.
16. YALTIRAK, C., SAKINÇ, M., AKSU, A.E., HISCOTT, R.N., GALLEB, B., ULGEN, U.B., 2002. “Late Pleistocene uplift history along the southwestern Marmara Sea determined from raised coastal deposits and global sea-level variations”. Marine Geology 190: 283-305.