A new study published in Archaeological Research Quarterly has introduced a revolutionary dating technique using Molybdenum-98 isotopic fractionation to analyze ancient slag heaps. When applied to iron smelting sites in the northern Deccan Plateau, the methodology refined the timeline for advanced metallurgical production in the region to approximately 1400 BCE. This adjustment pushes the established chronology of high-heat smelting in Central India back by nearly two centuries, demonstrating a level of technical precision previously thought to be impossible for that era.
The research team, comprised of scientists from the Indian Institute of Science and Oxford University, argued that this new precision allows for a direct correlation between archaeological layers and specific environmental events recorded in local tree rings. By tracking the specific isotopic signatures of Molybdenum used in flux agents, researchers can now identify the specific seasonal windows in which ancient forges were active, providing a high-resolution view of industrial life in the early South Asian Iron Age.