Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia

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Obsidian raw material has been widely used in central and southern Patagonia from the beginning of the occupation of this region. In NW Santa Cruz province, Argentina, the geochemical analyses published to date suggest that Pampa del Asador was the main obsidian source. However, both the spatial and...

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Autor principal:	Leal, Pablo Rodrigo
Publicado:	2015
Materias:	Argentina Geochemical analysis NW Santa Cruz Obsidian Patagonia archaeology artifact basin chemical analysis geochemistry obsidian occupation paleoenvironment spatiotemporal analysis Buenos Aires [Argentina] Santa Cruz [Argentina]
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10406182_v375_n_p44_Fernandez http://hdl.handle.net/20.500.12110/paper_10406182_v375_n_p44_Fernandez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10406182_v375_n_p44_Fernandez
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spelling	paper:paper_10406182_v375_n_p44_Fernandez2023-06-08T16:00:51Z Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia Leal, Pablo Rodrigo Argentina Geochemical analysis NW Santa Cruz Obsidian Patagonia archaeology artifact basin chemical analysis geochemistry obsidian occupation paleoenvironment spatiotemporal analysis Argentina Buenos Aires [Argentina] Patagonia Santa Cruz [Argentina] Obsidian raw material has been widely used in central and southern Patagonia from the beginning of the occupation of this region. In NW Santa Cruz province, Argentina, the geochemical analyses published to date suggest that Pampa del Asador was the main obsidian source. However, both the spatial and temporal limits of the distribution of obsidians from this and other sources in the region remain undefined. The principal goal of this article is to characterize obsidian artifacts from archaeological sites, located in a portion of NW Santa Cruz, from which there is no available geochemical information. ICP-MS analyses were obtained for 49 obsidian artifacts recovered from 24 excavated rockshelters and open-air surface scatters. The results indicate that all the samples of black obsidian came from the Pampa del Asador source, located ~90-160km to the south. Two samples of grey obsidian discovered on the top of Meseta del Lago Buenos Aires are chemically different from any other archeological obsidian yet analyzed in southern Patagonia. Their origin is still unknown, but they are most likely derived from a local Meseta del Lago Buenos Aires obsidian source. These results contribute to the knowledge about the use of obsidian in NW Santa Cruz, and provide constraints on the communication and material exchange between different environments and basins in this region. © 2014 Elsevier Ltd and INQUA. Fil:Leal, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10406182_v375_n_p44_Fernandez http://hdl.handle.net/20.500.12110/paper_10406182_v375_n_p44_Fernandez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentina Geochemical analysis NW Santa Cruz Obsidian Patagonia archaeology artifact basin chemical analysis geochemistry obsidian occupation paleoenvironment spatiotemporal analysis Argentina Buenos Aires [Argentina] Patagonia Santa Cruz [Argentina]
spellingShingle	Argentina Geochemical analysis NW Santa Cruz Obsidian Patagonia archaeology artifact basin chemical analysis geochemistry obsidian occupation paleoenvironment spatiotemporal analysis Argentina Buenos Aires [Argentina] Patagonia Santa Cruz [Argentina] Leal, Pablo Rodrigo Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia
topic_facet	Argentina Geochemical analysis NW Santa Cruz Obsidian Patagonia archaeology artifact basin chemical analysis geochemistry obsidian occupation paleoenvironment spatiotemporal analysis Argentina Buenos Aires [Argentina] Patagonia Santa Cruz [Argentina]
description	Obsidian raw material has been widely used in central and southern Patagonia from the beginning of the occupation of this region. In NW Santa Cruz province, Argentina, the geochemical analyses published to date suggest that Pampa del Asador was the main obsidian source. However, both the spatial and temporal limits of the distribution of obsidians from this and other sources in the region remain undefined. The principal goal of this article is to characterize obsidian artifacts from archaeological sites, located in a portion of NW Santa Cruz, from which there is no available geochemical information. ICP-MS analyses were obtained for 49 obsidian artifacts recovered from 24 excavated rockshelters and open-air surface scatters. The results indicate that all the samples of black obsidian came from the Pampa del Asador source, located ~90-160km to the south. Two samples of grey obsidian discovered on the top of Meseta del Lago Buenos Aires are chemically different from any other archeological obsidian yet analyzed in southern Patagonia. Their origin is still unknown, but they are most likely derived from a local Meseta del Lago Buenos Aires obsidian source. These results contribute to the knowledge about the use of obsidian in NW Santa Cruz, and provide constraints on the communication and material exchange between different environments and basins in this region. © 2014 Elsevier Ltd and INQUA.
author	Leal, Pablo Rodrigo
author_facet	Leal, Pablo Rodrigo
author_sort	Leal, Pablo Rodrigo
title	Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia
title_short	Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia
title_full	Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia
title_fullStr	Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia
title_full_unstemmed	Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia
title_sort	geochemical analysis of obsidian from archaeological sites in northwestern santa cruz province, argentine patagonia
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10406182_v375_n_p44_Fernandez http://hdl.handle.net/20.500.12110/paper_10406182_v375_n_p44_Fernandez
work_keys_str_mv	AT lealpablorodrigo geochemicalanalysisofobsidianfromarchaeologicalsitesinnorthwesternsantacruzprovinceargentinepatagonia
_version_	1768546263299522560

Geochemical analysis of obsidian from archaeological sites in northwestern Santa Cruz Province, Argentine Patagonia

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