Artículo
First archaeointensity reference paleosecular variation curve for South America and its implications for geomagnetism and archaeology
Goguitchaichvili, Avto; Greco Mainero, Mariano Catriel
; García Ruíz, Rafael; Pereyra Domingorena, Lucas
; Cejudo, Ruben; Morales, Juan; Gogorza, Claudia Susana
; Scattolin, Maria Cristina
; Tarrago, Myriam Noemi
Fecha de publicación:
01/03/2019
Editorial:
Cambridge University Press
Revista:
Quaternary Research
ISSN:
0033-5894
e-ISSN:
1096-0287
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We report comprehensive rock-magnetic and archaeointensity investigations from 21 well-constrained pottery fragments from the Catamarca province of northwest Argentina. The absolute ages of the studied sites are ascertained by several high-quality radiometric ages and range between 1940 to 114014C yr BP. Magnetic mineralogy experiments indicates that the remanence is carried by thermally stable Ti-poor titanomagnetites. Forty-seven samples belonging to 11 out of 98 studied potsherds yielded reliable absolute intensity determinations judging from the quality parameters associated with the Thellier double-heating experiments. Moreover, we analyzed the available absolute geomagnetic intensities associated with the radiometric ages to construct the first intensity paleosecular variation curve (PSVC) for South America using thermoremanent magnetization carried by burned archaeological artifacts obtained in the present investigation and 79 other selected archaeointensities (out of 213 published in the literature). The dataset is used to build the PSVC reference curve by combined bootstrap and temporal P-spline methods. The variation curve shows significant differences with the global prediction model SHA.DIF.14k mainly based on the GEOMAGIA database. This intensity PSVC curve shows reasonably good agreement with paleosecular variation curves for Europe between 850 through 1150 BC and for Asia between 1000 and 1500 BC. This regional curve may be used as most reliable archaeomagnetic dating tool for the major part of South America (Peru, Brazil, Argentina, Chile, and Bolivia) for the last two millennia.
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Articulos(CCT - SAN LUIS)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SAN LUIS
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SAN LUIS
Articulos(IDECU)
Articulos de INSTITUTO DE LAS CULTURAS
Articulos de INSTITUTO DE LAS CULTURAS
Citación
Goguitchaichvili, Avto; Greco Mainero, Mariano Catriel; García Ruíz, Rafael; Pereyra Domingorena, Lucas; Cejudo, Ruben; et al.; First archaeointensity reference paleosecular variation curve for South America and its implications for geomagnetism and archaeology; Cambridge University Press; Quaternary Research; 92; 1; 1-3-2019; 81-97
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