They presented the first results of their study of Strontium isotopic composition: the first stage of 87Sr/86Sr ratio mapping in the Altai region and Mongolia and, results of a study of faunal samples from Orkhon-1 and Moiltyn-am. 87Sr/86Sr ratios of bone samples, compared to results obtained on sediments from site profiles, indicate that some species did not permanently inhabit the Orkhon Valley, but migrated, presumably on a seasonal basis.


