A series of new radiocarbon dates for the sites of the Early Bronze Age of the Upper Ob region

The use of radiocarbon dating in establishing the chronology of archaeological sites has already become an obligatory norm for modern research. Despite the existing challenges, the analysis technique and the equipment used are constantly being improved. There are available computer programs for calibrating radiocarbon dates to obtain absolute figures reflecting the realities o f the existing calendar system. Many aspects of the effectiveness of radiocarbon dating depend on the analyzed sample. An important aspect is the obtaining of the representative series of the data. Besides, it is desirable to conduct research in different laboratories, taking into account certain requirements. The purpose of this article is to present and analyze the new radiocarbon dates obtained from samples of four (including two basic) sites of the Eluninskaya archaeological culture in the scientific laboratories of Russia and China to further develop the obj ective chronology of the Early Bronze complexes in the Upper Ob area. The published dates were obtained at the Analytical Center of the Institute for Monitoring Climate and Ecological Systems (IMCES) of the SB RAS (Tomsk). Determination of the radiocarbon content was carried out by a liquid-scintillation method on a low-background spectrometer-radiometer Quantulus 1220 of the Tomsk Center for Collective Use of the SB RAS. The calculation of the radiocarbon age is carried out using the EasyVicw program. Calibration of the radiocarbon age in the calendar indicators was made using the OxCal 3 program. The indicated center obtained a series of 11 dates. In the radiocarbon laboratory of the Center for Archaeological Technology of the Institute of Archaeology of the Chinese Academy of Social Sciences, conclusions were made about 5 samples. The staff of the radiocarbon laboratory of the Institute of Geology of the Chinese Seismic Bureau (C14 Laboratory of the Institute of Geology, China Earthquake Administration), as well as the National Laboratory of Nuclear Physics and Nuclear Technology of the Beijing University (State Key Laboratory of Nuclear Physics and Nuclear Technology Peking University) took part in the work. As a result, a general series of 16 dates was obtained from the following sites of the early Bronze Age: the Kolyvanskoe-1 and Berezovaya Luka settlements, the Myshyniy Log-I and Kalistratikha-3 burial grounds. Analyzed indicators inform that the listed objects existed in the period from the 23rd to 17th century BC which corresponds to the current understanding of the chronology of the Elunino antiquities. Comparison of the dates obtained from the materials of the same sites, first of all from the Kolyvanskoye-1 settlement and the Kalistratykha-3 burial ground, with the help of AMS-dating in the laboratories of China and the liquid-scintillation method in the Russian scientific center in general showed their chronological correspondence. The peculiarity lies in the different intervals of the error in the results and in the specificity of the samples taken. The presented dates along with others can be used for comparative analysis in establishing the chronology of the objects of the nearest (in time and territory) archaeological cultures, and also to form the context of the ancient history of Eurasia.

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