Immigration patterns inferred from oxygen isotope analysis of human teeth from the Tylos-period Maqaba burial mounds in Bahrain

A groundbreaking analysis of oxygen isotopes in human teeth from the Tylos-period Maqaba burial mounds in Bahrain reveals that many interred individuals were immigrants, likely involved in trade or administration, rather than native to the region. This finding challenges the assumption that these mounds primarily housed local Bahrainis and suggests significant cross-regional migration during this period (330 BC to AD 300). The study employed stable oxygen isotope analysis of dental enamel, comparing it with modern water isotopic signatures from Bahraini sources to infer geographic origins. While the exact origins remain unclear, this research provides compelling evidence for the movement of people across major trade routes linking the Mediterranean, Mesopotamia, and India during the Tylos period.

Itahashi, Y., Okazaki, K., Yoshimura, K., Oyabu, Y., & Saito, K. (2025). Immigration patterns inferred from oxygen isotope analysis of human teeth from the Tylos-period Maqaba burial mounds in Bahrain. Frontiers in Environmental Archaeology, 3. https://doi.org/10.3389/fearc.2024.1406999