Beyond 'Community Craft Specialisation' in Prehistoric Mainland Southeast Asian Metallurgy: Copper Smelting Behaviours at Khao Sai On, Nil Kham Haeng, Non Pa Wai, Phromthin Tai, and Tha Kae in Central Thailand.

Archaeology in Lopburi Province has been under long-term development since the 1970s and has led to the discovery of Khao Wang Prachan Valley (KWPV) as one of three currently known primary copper production (mining and smelting) sites in Southeast Asia. However, since the 1980s, archaeometallurgical research has focused mainly on the two sites of Non Pa Wai (NPW) and Nil Kham Haeng (NKH), dated from the Neolithic (ca. 1800 B.C.) to Early Iron Age (ca. 2300 B.C.), that are known to have large sequences of archaeological material linked to copper production. Although other sites with evidence of copper production are known in this restricted geographical area, their assemblages have not previously been subjected to archaeometric study. This article discusses the results of archaeometallurgical analyses of slags from Khao Sai On (KSO), Tha Kae (TK), and Phromthin Tai (PTT) with sequences dated during the Middle-Late Iron Age. Slag analysis reveals that different smelting behaviours were occurring at these sites. One heterogeneous smelting behaviour at Khao Sai On was probably linked to a smaller community practicing metallurgy amongst other activities, whilst Phromthin Tai shows more homogeneous production linked to a larger settlement. Although these three sites are located within 26 km of each other, smelters were probably exploiting different local copper deposits around KWPV. The results seem to support a community-based type of production where production behaviours are linked to local geology, technical competence, and intensity of exploitation. [ABSTRACT FROM AUTHOR]