New Britain obsidian sources

Roger Bird · Robin Torrence · Glenn R. Summerhayes · G.M. Bailey

34 citations0/0 files storedArchaeology in Oceania/Archæology & physical anthropology in Oceania

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Cultural Heritage Materials Analysis Mineralogy and Gemology Studies Pacific and Southeast Asian Studies

Abstract

Abstract The natural occurrence of obsidian in volcanic flows in West New Britain has been thoroughly investigated and new measurements of the composition of field samples have been made with a proton dose of 150 μC, increased by a factor of three compared to analyses reported in early studies. New data on precision and accuracy of PIXE‐PIGME show that measurement error is not a significant factor in interpretations of chemical variability among source and artifact samples. The results provide evidence for 5 readily distinguishable groups of source samples (Gulu, Kutau/Bao, Baki, Hamilton and Mopir) plus two subgroups (GaralaB and GaralaC) which differ from the Baki source for a few elements and have higher standard deviations from most elements. An unusual degree of variability within the Hamilton and Garala source samples must be taken into account during the classification of artifact collections.

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References

1993Archaeology, geology, and geochemistry in obsidian provenance studies 1987Archaeometry : further Australasian studies 1993The transport of Mopir obsidian to late Pleistocene New Ireland 1989Lapita sites of the Bismarck Archipelago 1998Application of PIXE-PIGME to Archaeological Analysis of Changing Patterns of Obsidian Use in West New Britain, Papua New Guinea 1992Poterie lapita et peuplement 1992From Pleistocene to Present: obsidian sources in west New Britain, Papua New Guinea 1986Diachronic Variability in Obsidian Procurement Patterns in Northeastern California and Southcentral Oregon

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2010Assessing the viability of portable Raman spectroscopy for determining the geological source of obsidian 2008Characterising volcanic glass sources in the Banks Islands, Vanuatu 2007Archaeological Studies of the Middle and Late Holocene, Papua New Guinea 2019Detecting exchange networks in New Britain, Papua New Guinea: geochemical comparisons between axe‐adze blades and in situ volcanic rock sources 2020Obsidian and volcanic glass artifact evidence for long-distance voyaging to the Polynesian Outlier island of Tikopia

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