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vol.37 issue2CARAVANS, ROCK ART AND RITUALISM IN THE QUEBRADA SUCA (NORTHERN CHILE)ARSENIASIS AS AN ENVIRONMENTAL HYPOTHETICAL EXPLANATION FOR THE ORIGIN OF THE OLDEST ARTIFICIAL MUMMIFICATION PRACTICE IN THE WORLD author indexsubject indexarticles search
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Chungará (Arica)

On-line version ISSN 0717-7356

Abstract

SEELENFREUND, Andrea; MIRANDA, Javier; DINATOR, María Inés  and  MORALES, J. Roberto. CHARACTERIZATION OF OBSIDIAN SAMPLES FROM NORTHERN AND SOUTH CENTRAL CHILE USING X-RAY FLUORESCENCE ANALYSES. Chungará (Arica) [online]. 2005, vol.37, n.2, pp.245-253. ISSN 0717-7356.  http://dx.doi.org/10.4067/S0717-73562005000200009.

This work is a part of a project to characterize the sources and provenance of obsidians found in archaeological sites in Chile. The aim of the project is to characterize the different sources used in the past and study its distribution. In the present work obsidian samples from different Chilean geological regions, located in South Central Chile (Laguna del Maule/volcanic area, sources of Las Coloradas and La Plata), "Radal 7 Tazas" and the North of Chile (Copiapó Volcano) were analyzed, as well as obsidian artifacts from "site 25-Las Estacas", Quebrada de Jorquera (Copiapó, Northern Chile) by means of X-ray fluorescence, using radioactive sources. The analysis was performed using 109Cd and 241Am annular excitation sources and X-ray fluorescence system. This allowed the determination of Fe, Cu, Rb, Sr, Y, Zr, and Ba concentrations on samples of ground obsidian from the aforementioned sites. The measured Rb, Sr, and Zr concentrations were used to construct discriminant diagrams, which clearly showed clustering of the samples from the different sources, and the association of the archaeological obsidian sample to the Copiapó Volcano source, which is geographically close to the site

Keywords : Obsidian; Chile; X-ray Fluorescence.

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