Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America)

The present work aims to analyse the magnetic signature from the Late Holocene open-air archaeological deposits of hunter–gatherer ephemeral occupations. For this purpose, two profiles were sampled at the Marazzi 2 site in the north-western Isla Grande de Tierra del Fuego, Chile, in order to carry o...

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Detalles Bibliográficos
Autores principales: Ozán, I.L., Orgeira, M.J., Vásquez, C., Naselli, M.
Formato: JOUR
Materias:
Combustion
Hunter–Gatherers
Magnetic Enhancement
Ochre
Open-Air Site
combustion
Holocene
human settlement
hunter-gatherer
magnetic property
magnetic reversal
magnetic susceptibility
paleomagnetism
remanent magnetization
Chile
Tierra del Fuego [(ISG) South America]
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0003813X_v59_n6_p1135_Ozan
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0003813X_v59_n6_p1135_Ozan
record_format dspace
spelling todo:paper_0003813X_v59_n6_p1135_Ozan2023-10-03T13:56:40Z Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America) Ozán, I.L. Orgeira, M.J. Vásquez, C. Naselli, M. Combustion Hunter–Gatherers Magnetic Enhancement Ochre Open-Air Site combustion Holocene human settlement hunter-gatherer magnetic property magnetic reversal magnetic susceptibility paleomagnetism remanent magnetization Chile Tierra del Fuego [(ISG) South America] The present work aims to analyse the magnetic signature from the Late Holocene open-air archaeological deposits of hunter–gatherer ephemeral occupations. For this purpose, two profiles were sampled at the Marazzi 2 site in the north-western Isla Grande de Tierra del Fuego, Chile, in order to carry out studies of magnetic susceptibility, hysteresis cycles, back-field remanent magnetization, isothermal remanent magnetization and thermal variation of magnetic susceptibility at high and low temperature. Despite short-term occupations, the P1 profile shows a magnetic peak at a depth of ~30–70 cm due to magnetite, probably formed by anthropogenic activity related to combustion. The P2 profile instead yields an anomalous peak of coercivity (at a depth of 20–40 cm), which could also be anthropogenic, due to the presence of finely dispersed ancient ‘red ochre’. The red ochre is proposed to form anthropogenic thermal alteration of goethite associated with volcanic ash, the remnants of which were found in thin sections from the P2 subsoil. © 2017 University of Oxford Fil:Orgeira, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vásquez, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0003813X_v59_n6_p1135_Ozan
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Combustion
Hunter–Gatherers
Magnetic Enhancement
Ochre
Open-Air Site
combustion
Holocene
human settlement
hunter-gatherer
magnetic property
magnetic reversal
magnetic susceptibility
paleomagnetism
remanent magnetization
Chile
Tierra del Fuego [(ISG) South America]
spellingShingle Combustion
Hunter–Gatherers
Magnetic Enhancement
Ochre
Open-Air Site
combustion
Holocene
human settlement
hunter-gatherer
magnetic property
magnetic reversal
magnetic susceptibility
paleomagnetism
remanent magnetization
Chile
Tierra del Fuego [(ISG) South America]
Ozán, I.L.
Orgeira, M.J.
Vásquez, C.
Naselli, M.
Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America)
topic_facet Combustion
Hunter–Gatherers
Magnetic Enhancement
Ochre
Open-Air Site
combustion
Holocene
human settlement
hunter-gatherer
magnetic property
magnetic reversal
magnetic susceptibility
paleomagnetism
remanent magnetization
Chile
Tierra del Fuego [(ISG) South America]
description The present work aims to analyse the magnetic signature from the Late Holocene open-air archaeological deposits of hunter–gatherer ephemeral occupations. For this purpose, two profiles were sampled at the Marazzi 2 site in the north-western Isla Grande de Tierra del Fuego, Chile, in order to carry out studies of magnetic susceptibility, hysteresis cycles, back-field remanent magnetization, isothermal remanent magnetization and thermal variation of magnetic susceptibility at high and low temperature. Despite short-term occupations, the P1 profile shows a magnetic peak at a depth of ~30–70 cm due to magnetite, probably formed by anthropogenic activity related to combustion. The P2 profile instead yields an anomalous peak of coercivity (at a depth of 20–40 cm), which could also be anthropogenic, due to the presence of finely dispersed ancient ‘red ochre’. The red ochre is proposed to form anthropogenic thermal alteration of goethite associated with volcanic ash, the remnants of which were found in thin sections from the P2 subsoil. © 2017 University of Oxford
format JOUR
author Ozán, I.L.
Orgeira, M.J.
Vásquez, C.
Naselli, M.
author_facet Ozán, I.L.
Orgeira, M.J.
Vásquez, C.
Naselli, M.
author_sort Ozán, I.L.
title Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America)
title_short Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America)
title_full Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America)
title_fullStr Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America)
title_full_unstemmed Magnetic Alteration of Soils by Late Holocene Hunter–Gatherer Groups (Tierra Del Fuego, South America)
title_sort magnetic alteration of soils by late holocene hunter–gatherer groups (tierra del fuego, south america)
url http://hdl.handle.net/20.500.12110/paper_0003813X_v59_n6_p1135_Ozan
work_keys_str_mv AT ozanil magneticalterationofsoilsbylateholocenehuntergatherergroupstierradelfuegosouthamerica
AT orgeiramj magneticalterationofsoilsbylateholocenehuntergatherergroupstierradelfuegosouthamerica
AT vasquezc magneticalterationofsoilsbylateholocenehuntergatherergroupstierradelfuegosouthamerica
AT nasellim magneticalterationofsoilsbylateholocenehuntergatherergroupstierradelfuegosouthamerica
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