A new research paper in Nature Archaeology has utilized a refined Accelerator Mass Spectrometry (AMS) methodology to re-date organic residues found on 'Copper Hoard' artifacts from the Upper Ganges Basin. The study pushes the origin of this enigmatic culture back to 2500 BCE, placing it firmly as a contemporary peer to the Mature Harappan Civilization rather than a later, post-urban successor.
The methodology involved high-precision carbon-14 dating of micro-charcoal trapped within the oxidation layers of the copper implements. This discovery suggests a much more interconnected Bronze Age in the Indian subcontinent, where specialized metallurgical communities in the Gangetic plains maintained active trade networks with the urban centers of the Indus Valley, sharing technological motifs in weaponry and ritual objects.