Geoarchaeological studies on Roman time harbour sediments in Cologne — comparison of different OSL dating techniques

Geochronometria

Marcus Trier¹  Manfred Frechen²  Sumiko Tsukamoto²  Tobias Lauer²  Magret C. Fuchs³  Rainer Bonn⁴ 

[1] Römisch-Germanisches Museum / Archäologische Bodendenkmalpflege der Stadt Köln;Section 3: Geochronology and Isotope Hydrology;TU Bergakademie Freiberg;Wasser Boden Landschaft

关键词: OSL;    feldspar impurities;    statistical models;    Romans;    Geoarchaeology;   

DOI  :  10.2478/s13386-011-0020-y

学科分类：社会科学、人文和艺术（综合）

来源: Politechnika Slaska * Instytut Fizyki

【 摘 要 】

Due to the construction of a new North-South subway in Cologne, Roman time harbour sediments were exposed and were sampled for luminescence dating. A very good independent age control was given by the precise knowledge of the chronology of Roman activity and by radiocarbon ages of charcoal samples. Hence, different methodological approaches within luminescence dating were applied for Holocene heterogeneously bleached fluvial samples and were compared to the known ages. For one sample, optically stimulated luminescence (OSL) dating was applied to coarse-grained quartz using a single aliquot regenerative-dose (SAR) protocol. After De-measurements, different statistical approaches were tested (i.e. arithmetic mean, median, minimum age model, finite mixture model, leading edge method and the Fuchs and Lang approach). It is demonstrated that the Fuchs and Lang approach along with the leading edge method yielded the best matching OSL ages with respect to the known ages.

【 授权许可】

Unknown