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Sustained archaeometallurgical research since 2008 has permitted the Southeast Asian Lead Isotope Project (SEALIP) to establish the general anthropological and geochemical parameters of late prehistoric and early historic regional nonferrous base metal exchange networks. A 79 artefact assemblage from the mid-late Iron Age (2nd-8th c. AD) settlement and residential burial site of Non Ban Jak (NBJ) in lower northeast Thailand gave an opportunity to generate a fine-grained interpretation of copper-base metal supply and demand at the cusp of mainland state formation. Previous hints that the central Thai copper production centres in the Khao Wong Prachan Valley (KWPV) were only weakly active during the Iron Age, were reinforced by the near total absence of the KWPV signature at NBJ, only 165 km to the east. Since 2011, copper production at the Vilabouly Complex (VC) in central Laos has dominated regional consumption signatures, and a simple reading of the NBJ dataset would support this thesis. However, a high-density sampling shows that VC production is not actually consistent with much of NBJ consumption, and thus we must search for other Southeast Asian copper production loci. Finally, being able to analyse multiple artefacts of a range of typologies enables us to identify material culture associations between individuals at NBJ, those at other lower northeast Thai sites, and even between individuals at contemporary sites in northwest Cambodia. Intriguingly, these potential consistencies between individuals at an international scale all concern middle-aged men, possibly reinforcing regional bioarchaeological interpretations of matrilocality. [ABSTRACT FROM AUTHOR]

Ban Chiang is a prehistoric settlement located in the northeast Khorat Plateau in Thailand. Excavations in 1974–1975 identified a cultural sequence that spanned the arrival of the first rice farmers in ca. 1500 BC until the end of the Iron Age two millennia later. The large faunal sample includes the remains of mammals, fish, birds, and shellfish that illuminate aspects of the economy and environment. Domestic cattle, water buffaloes, pigs, and dogs, all domesticated in southern China, were introduced and maintained in an economy that incorporated hunting, fishing and collecting shellfish. The jungle fowl, Gallus gallus, was probably locally domesticated. When considered in its broader context, the faunal remains from Neolithic coastal Vietnamese and Thai sites present a very different picture. In the coastal sites, pigs and dogs dominate, but domestic cattle and chickens are virtually absent. The incoming farmers placed much reliance on marine hunting and fishing. Recent multidisciplinary research has identified an agricultural revolution involving animal traction and plowing in irrigated rice fields that occurred as the monsoon rains faltered from ca. AD 200. This took place in the relatively dry Mun River Valley in the southern part of the Khorat Plateau and rapidly led to the foundation of early states. Ban Chiang, however, enjoys higher natural rainfall and evidence for the agricultural revolution there appears muted or absent. [ABSTRACT FROM AUTHOR]