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Geochemical characterization of two obsidian sources located in the Department of Antofagasta de la Sierra (Catamarca) is presented. This information is combined with results of provenance analysis (INAA) carried out on obsidian archaeological artifacts from 20 sites dated be- tween 2200-600 BP and located in several ecological zones of Northwest Argentina. Considering that the circulation range for the two sources are different, this paper attempts to evaluate the differential nature of, procurement, con- sumption and exchange strategies for both these obsidian sources. We further analyzed the lithic assemblages re- covered from one of the obsidian sources and from the Casa Chavez Montículos site.

Variabilidad en la explotación y distribución de obsidianas en la Puna Meridional argentina