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Magallania (Punta Arenas)

On-line version ISSN 0718-2244

Abstract

CASTRO ESNAL, Analía; STERN, Charles  and  PEREZ DE MICOU, Cecilia. GEOCHEMICAL STUDIES OF ARCHAEOLOGICAL OBSIDIAN ARTIFACTS FROM BOTH STRATIGRAPHIC AND SURFACE CONTEXTS IN ALDEA BELEIRO VILLAGE, SOUTHWESTERN CHUBUT (PATAGONIA, ARGENTINA). Magallania [online]. 2017, vol.45, n.1, pp.123-135. ISSN 0718-2244.  http://dx.doi.org/10.4067/S0718-22442017000100123.

In this work, new data are presented resulting from the application of ICP-MS analysis of samples of obsidian artifacts found in layered archaeological deposits excavated in the main cave (CP1) of Casa de Piedra, Estancia Roselló, Aldea Beleiro (SW Chubut, Patagonia, Argentina) and in surface sites nearby. The results show that the predominant obsidian in CP1 is from the Pampa del Asador source (PDA) (Santa Cruz, Argentina), although the finding of one obsidian artifact from Río Cisnes (CIS) (Aisén, Chile) in a component dated ~7.700 years BP stands out. Also, the southernmost case of obsidian from Sacanana (S1) has been recovered in Arenal Solsona, a surface site near CP1. These new results and the previous information from Chubut (Argentina) and Aisén (Chile) are discussed. Thus, a summary and update of the state of the information is presented and the implications of the new findings for understanding the technological strategies and mobility circuits of hunter-gatherers are discussed, taking into account a broad chronological framework ranging from the early Holocene until the times of contact.

Keywords : obsidian circulation; geochemical analysis by ICP-MS; temporal trends; Chubut; Argentina.

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