Age determination of obsidian source samples from North Queensland and New South Wales by means of the fission track method
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Date
1997-02-10
Journal Title
Journal ISSN
Volume Title
Publisher
AINSE
Abstract
The fission track method applied to obsidian samples allows one to determine their geological age by counting etched tracks due to spontaneous fission of Uranium impurities, usually in the ppm-tens of ppm range. Only recently has research in Australian obsidians started, after the discoveries of both artefacts and geological sources, the latter being located mainly in North Queensland and New South Wales. Following irradiation at the nuclear reactor of Pavia University (Italy) the obsidian samples were etched under standard conditions, then the induced fission track density and the uranium content were measured with an uncertainty of an order of 4%. Thermal treatment based age corrections have been applied to get the true age. © The Authors.
Description
Keywords
Age estimation, Experimental data, Heat treatments, Igneous rocks, Irradiation, New South Wales, Queensland, Temperature dependence, Uranium, Actinides, Rocks
Citation
Bonetti, R., Guglielmetti, A., Malerba, F., Oddone, M., Bird, R., & Torrence, R. (1997). Age determination of obsidian source samples from North Queensland and New South Wales by means of the fission track method. Paper presented to the Sixth Australasian archaeometry conference, Sydney, NSW, Australia, 10-13 February, 1997, (pp. 39–40). In Sixth Australasian Archaeometry Conference : "Australasian Archaeometry: retrospectives for the new millenium", Australian Museum, Sydney, 10-13 February 1997. Lucas Heights, Australia : AINSE.