Problems with Strontium Isotopic Proveniencing in Denmark?

A recent study by Thomsen and Andreasen (2019) has induced a negative reaction to the usefulness of strontium isotope proveniencing. Although there are higher strontium isotope values in the landscape of Denmark, Thomsen and Andreasen are not correct about the impact of this finding on studies of prehistoric mobility. Several case studies identify such “hotspots” in the landscape and help evaluate their consequences for identifying non-local individuals. In sum, (1) there are small areas of higher strontium isotope values in Denmark, (2) surface water is not a reliable proxy for baseline information on local strontium isotope sources, and (3) strontium isotope proveniencing remains a very useful method for identifying non-local individuals.

THE TEMPLE OF QUETZALCOATL, TEOTIHUACAN: NEW DATA ON THE ORIGINS OF THE SACRIFICIAL VICTIMS

Continuing isotopic investigation of the sacrificial burials and trophies beneath the Feathered Serpent Pyramid (Temple of Quetzalcoatl) in ancient Teotihuacan, Mexico, has produced new results. Isotopic proveniencing using bioapatite strontium and structural carbonate oxygen isotopes in tooth enamel was applied to 39 samples, 24 from the sacrificial victims and 15 from the trophy jaws. Both the strontium and oxygen isotope ratios suggest that most or all of the sacrificial victims came from the central highlands of Mexico, which includes the area of Teotihuacan. In this sense, we find somewhat less multiethnicity represented among the military at Teotihuacan than previously thought. Analysis of carbon isotope ratios in enamel structural carbonate indicated a childhood diet dominated by maize, relatively homogeneous among the victims at the pyramid, and typical for much of pre-Hispanic Mesoamerica.