X-ray CT scans of Bronze Age slag from Tepe Hisar in NE Iran revealed 3D pore networks, copper droplets & layered structures. Internal patterns show copper prills forming only under controlled smelting — evidence of systematic, competent metallurgical tradition by the late 3rd millennium BCE.
CT scanning reveals Bronze Age copper smelting at Tappeh Ḩeşār
IranTechnology
Key facts
- Researchers used X-ray CT scanning on Bronze Age slag from Tappeh Ḩeşār in northeastern Iran
- CT revealed 3D networks of pores, copper droplets, layered structures, and mineral-filled cracks
- The technology allowed targeting specific internal phases including arsenic-rich metallic residues
- Internal patterns showed copper prills and flow structures only forming under controlled smelting
- Evidence demonstrates systematic repeated copper smelting by the late 3rd millennium BCE.
- This was competent metallurgical tradition, not experimental or accidental processing
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