ロシア沿海州新石器遺跡堆積物の赤外光ルミネッセンス（IRSL）年代測定

概要

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The infrared stimulated luminescence (IRSL) dating was performed for the sedimentary samples from the Neolithic sites, Zaisanovka 1 site, Posiet 1 site and Ustinovka 3 site, in the Russian Far East (the Maritime Region). The IRSL samples were collected from the 3 and 4 layers at the Zaisanovka 1 site, the upper and lower layers of the cultural horizon at the Posiet l site and the III and IV layers at the Ustinovka 3 site. The paleodose of each sample was estimated by the multiple aliquot additive dose (MAAD) protocol with poly-mineral fine grain samples prepared from the collected sedimentary samples. The IRSL measurement conditions (detection wave lengths, measurement temperatures and preheat conditions) were determined according to the results of preliminary experiments using four types of standard feldspar specimen. Annual doses (dose rates) were estimated from the concentrations of U, Th and K-40 using a high-purity Ge gamma-ray spectrometer. The IRSL ages obtained are 1.9±0.8ka and 3.4±0.7ka for the Zaisanovka 1 site, 8.7±2.1ka, 14.9±2.5ka for the Posiet 1 site and 8.3±1.3ka, 11.0±0.8ka for the Ustinovka 3 site. The comparison of the IRSL ages with known C-14 data are also discussed.
2007-10-31