In this research project, isotopic analyses (⁸⁷Sr/⁸⁶Sr, δ¹⁸O, δ¹⁵N, δ¹³C) of prehistoric human and faunal skeletal remains from the Western Eurasian steppe belt are conducted and interpreted within an archaeological context. Several hundred samples were taken from micro regions between the Altai Mountains, the Eurasian steppe belt and the eastern European plains in Hungary and Bulgaria (figure 1). The chronological focus is on the 3^rd millennium BC, where there is evidence for two cultural communities: the Yamnaya culture (late 4^th millennium BC to mid 3^rd millennium BC in the Northern Pontic region) and the following and partly overlapping Catacomb culture (about 2800 to 2000/1900 BC). Earlier research approaches regarded the members of these populations as nomads. Recent research has mostly rejected this interpretation, with archaeologists citing a subsistence economy largely based on animal husbandry and a multitude of grave monuments (kurgans) in comparison to the small number of known settlements as evidence for partly nomadic or pastoral ways of life. In this project I will be following a different path by attempting to characterize the mobility behaviour and possible migrations of these individuals using strontium and oxygen isotope analyses. The data will then be compared to samples from the same regions but from the preceding Eneolithic and the later Iron Age, a period for which written sources indicate high mobility of the Scythian tribes. The strontium isotope analysis is conducted at the University of Bristol, while the samples for oxygen isotopes are prepared there and sent for further analysis to the RLAHA at the University of Oxford in cooperation with the University of Bristol. The answer to the second key question regarding the palaeodiet and subsistence economy of selected sites in the Northern Pontic will be approached by the application of carbon and nitrogen isotope analysis. In the end the large isotopic dataset will be interpreted in combination with the archaeological hypotheses and data.

Figure 1: Samples were taken from the following micro regions in the Northern Pontic and its adjacent areas: Hungary, Bulgaria, western Ukraine, southern Central Ukraine, Eastern Ukraine, Kuban region, Kalmykia, Middle Volga Region. The Altai Mountains are missing on the map (Eneolithic/Bronze Age: red, Iron Age: blue).