Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties

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This paper aims to evaluate the optical properties of natural rhyolite obsidians that might be useful in the identification of different sources of archaeological samples. Even though colour, degree of alteration, crystaloclast composition and texture are important properties by which sources can be...

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Autores principales: Fernández, M.V., Leal, P.R.
Formato: INPR
Lenguaje:English
Materias:
Obsidian
Optical properties
Patagonia
Refractive indices
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0003813X_v_n_p_Fernandez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0003813X_v_n_p_Fernandez
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spelling todo:paper_0003813X_v_n_p_Fernandez2023-10-03T13:56:40Z Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties Fernández, M.V. Leal, P.R. Obsidian Optical properties Patagonia Refractive indices This paper aims to evaluate the optical properties of natural rhyolite obsidians that might be useful in the identification of different sources of archaeological samples. Even though colour, degree of alteration, crystaloclast composition and texture are important properties by which sources can be identified, all of these features do not always lead to an unambiguous distinction. In this regard, the refractive index (ND) becomes a helpful tool because it is not only sensitive to the chemical composition of natural glasses but also to their different thermal histories. Obsidians from six localities of Patagonia were analysed. Their refractive index measurements (ND) only range between 1.47 and 1.49, but the ND values of some of these sources are sufficiently constrained to allow discrimination between them. © 2013 University of Oxford. Fil:Leal, P.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. INPR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0003813X_v_n_p_Fernandez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language English
orig_language_str_mv English
topic Obsidian
Optical properties
Patagonia
Refractive indices
spellingShingle Obsidian
Optical properties
Patagonia
Refractive indices
Fernández, M.V.
Leal, P.R.
Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties
topic_facet Obsidian
Optical properties
Patagonia
Refractive indices
description This paper aims to evaluate the optical properties of natural rhyolite obsidians that might be useful in the identification of different sources of archaeological samples. Even though colour, degree of alteration, crystaloclast composition and texture are important properties by which sources can be identified, all of these features do not always lead to an unambiguous distinction. In this regard, the refractive index (ND) becomes a helpful tool because it is not only sensitive to the chemical composition of natural glasses but also to their different thermal histories. Obsidians from six localities of Patagonia were analysed. Their refractive index measurements (ND) only range between 1.47 and 1.49, but the ND values of some of these sources are sufficiently constrained to allow discrimination between them. © 2013 University of Oxford.
format INPR
author Fernández, M.V.
Leal, P.R.
author_facet Fernández, M.V.
Leal, P.R.
author_sort Fernández, M.V.
title Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties
title_short Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties
title_full Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties
title_fullStr Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties
title_full_unstemmed Determining the Provenance of Obsidian in Southern Patagonia Using Optical Properties
title_sort determining the provenance of obsidian in southern patagonia using optical properties
url http://hdl.handle.net/20.500.12110/paper_0003813X_v_n_p_Fernandez
work_keys_str_mv AT fernandezmv determiningtheprovenanceofobsidianinsouthernpatagoniausingopticalproperties
AT lealpr determiningtheprovenanceofobsidianinsouthernpatagoniausingopticalproperties
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