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Testing the Accuracy of OSL and pIR IRSL Dating of Young Geoarchaeological Sediments in Coastal Peru
dc.contributor.author | Sanjurjo-Sánchez, Jorge | |
dc.contributor.author | Viveen, Willem | |
dc.contributor.author | Vega-Centeno Sara-Lafosse, R. | |
dc.date.accessioned | 2022-10-18T19:17:02Z | |
dc.date.available | 2022-10-18T19:17:02Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | J. Sanjurjo-Sánchez, W. Viveen, R. Vega-Centeno Sara-Lafosse (2022). Testing the accuracy of OSL and pIR IRSL dating of young geoarchaeological sediments in coastal Peru. Quaternary Geochronology. Volume 73, 101382. ISSN 1871-1014. https://doi.org/10.1016/j.quageo.2022.101382. (https://www.sciencedirect.com/science/article/pii/S1871101422001303) | es_ES |
dc.identifier.issn | 1871-1014 | |
dc.identifier.uri | http://hdl.handle.net/2183/31837 | |
dc.description | Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG | es_ES |
dc.description.abstract | [Abstract] Luminescence dating of late Quaternary sediments in Peru is challenging, especially on the Peruvian coast. Earlier studies have shown that quartz grains often exhibit a thermally unstable, medium signal that caused the underestimation of Optically Stimulated Luminescence (OSL) ages. InfraRed Stimulated Luminescence (IRSL) dating has shown to produce more reliable ages, depending, amongst other factors, on the age model (Central or Minimum Age Model), and the IRSL signal. IRSL dating of geoarchaeological sediments has, however, hardly been carried out, let along validated, against an independent age dataset. This dating approach is, nonetheless, the only promising way to date the geological substrate in which many of Peru's archaeological sites are buried. Peru contains some of the oldest and most important archaeological heritage sites, yet not much is known of the environmental context in which many of its early civilizations prospered. A better understanding of which luminescence method works best could therefore help in a better understanding of the geological-stratigraphical context of many of Peru's sites. To investigate this matter more fully, we compared the luminescence dating results of seven sediment samples from the top layer of the Lima alluvial fan and from geoarchaeological layers of the Maranga Complex (San Miguel, Lima), with an independent dataset of sixteen 14C ages. Our results showed that the quartz OSL ages always underestimated the expected ages due to a signal dominated by medium and slow components, and that the post-IR IRSL225 (pIR IRSL225) and IRSL50 ages of K-feldspars, on basis of the Central Age Model (CAM), always overestimated the expected ages. The Minimum Age Model (MAM) on the other hand, correctly predicted the expected ages for the early Holocene, Lima alluvial fan sediments using the pIR IRSL225 signal of K-feldspars, and the late Holocene, geoarchaeological ages using the IRSL50 signal. | es_ES |
dc.description.sponsorship | The research for this paper benefitted from two grants of the Palarq Foundation (Spain) for our research project “Estudio interacción hombre-ambiente en los procesos de población del valle del Rímac en Lima, Perú". Partial funding was provided by the Program “Consolidación y estructuración de unidades de investigación competitivas: Grupos de potencial de crecimiento” (ED431B 2021/17) of the Xunta de Galicia. The Management of the Parque de las Leyendas (San Miguel, Lima) is kindly acknowledged for the permissions that allowed us to study and sample the site. We also would like to thank the editor and an anonymous reviewer for valuable comments that improved the quality of this paper. Funding for open access charge: Universidade da Coruña/CISUG | es_ES |
dc.description.sponsorship | Xunta de Galicia; ED431B 2021/17 | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation.uri | https://doi.org/10.1016/j.quageo.2022.101382 | es_ES |
dc.rights | Atribución 4.0 Internacional (CC BY 4.0) | es_ES |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | * |
dc.subject | Rimac valley | es_ES |
dc.subject | Human occupation | es_ES |
dc.subject | Fluvial sediments | es_ES |
dc.subject | pIR IRSL dating | es_ES |
dc.title | Testing the Accuracy of OSL and pIR IRSL Dating of Young Geoarchaeological Sediments in Coastal Peru | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.access | info:eu-repo/semantics/openAccess | es_ES |
UDC.journalTitle | Quaternary Geochronology | es_ES |
UDC.volume | 73 | es_ES |
UDC.startPage | 101382 | es_ES |
dc.identifier.doi | 10.1016/j.quageo.2022.101382 |
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