Luminescence dating and associated analyses in transition landscapes of the Alto Ribatejo, central Portugal

Burbidge, Christopher Ian; Trindade, M.J.; Dias, María Isabel; Oosterbeek, Luíz; Scarre, Chris; Rosina, Pierluigi; Cruz, Ana Rosa; Cura, Sara; Cura, Pedro; Caron, L.; Prudêncio, M.I.; Cardoso, Gonçalo; Franco, Diogo; Marques, Rosa; Gomes, Hugo

doi:10.1016/j.quageo.2013.11.002

Cited by 18 publications

(12 citation statements)

References 37 publications

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“…Semi- quantitative age values were estimated by interpolating the total dose rates calculated for the quantitative dating samples. In this study, sampling and analysis for quantitative luminescence dating were undertaken using the methods of Burbidge et al (2014), which are based on a combination of instrumental neutron activation analysis (INAA, Dias et al, 2013;Dias and Prudêncio, 2007;Gouveia and Prudêncio, 2000;Prudêncio et al, 2006), high resolution gamma spectrometry (HRGS, Trindade et al, 2013), field gamma spectrometry (FGS; Trindade et al, 2014), water absorption and retention under free drainage, and OSL measurements. In the present case FGS was conducted using both Target Nanospec and HPI Rainbow Multi Channel Analysers, each with 2″ × 2″ NaI probes.…”

Section: Luminescence and Dosimetric Measurementsmentioning

confidence: 99%

“…Thus, many profiling samples that are out of stratigraphic sequence appear to contain redeposited material from the earlier phases of activity at the site, in which the OSL signal has not been reset. Such records are still useful in the interpretation of the history of the site, even though they have been removed from their original context, in the same manner as a survey or recovery of redeposited potsherds (e.g., Deckers et al, 2005;Burbidge et al, 2014).…”

Section: Direct Datingmentioning

confidence: 99%

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Distribution and chronological framework for Iberian variscite mining and consumption at Pico Centeno, Encinasola, Spain

et al. 2016

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AMS radiocarbon and OSL dating, and profiling were used to directly delimit periods of variscite production at Pico Centeno Mine 2. These results were integrated with analysis of other well-dated periods of variscite production to establish an Iberian-wide chronological framework. Variscite production at Pico Centeno Mine 2 began at ~ 5200 BC, coincident with alpine jade production or Casa Montero Iberian flint production. Variscite was only used occasionally, together with other greenstones, during the 5th and 6th millennia BC. During the 4th millennium BC, variscite use began to increase to its apogee in the first half of 3rd millennium BC when it appeared in nearly every Iberian burial site. This increase in variscite production and use coincided with decline in the popularity of alpine jade. By the end of the 3rd millennium BC, new resources began to be valued such as Asian and African Ivory, Baltic and Sicilian amber, and copper-based metal products. The variscite cycle thus started with the decline of jade in the 5th–4th millennium BC, and ended with the appearance of copper, ivory and extra-peninsular amber by the end of the 3rd millennium BC.

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Section: Luminescence and Dosimetric Measurementsmentioning

confidence: 99%

Section: Direct Datingmentioning

confidence: 99%

Distribution and chronological framework for Iberian variscite mining and consumption at Pico Centeno, Encinasola, Spain

et al. 2016

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“…In the laboratory, water content as a fraction of dry sample mass was measured as received, saturated, and following free drainage. Dose rates from alpha, beta and gamma radiation were calculated from elemental concentrations and corrected for time averaged water content78, which was constrained based on the measured values and the elevation of each sampling position relative to the water table. A more detailed description of the OSL dating analyses is provided in Costas et al 55…”

Section: Methodsmentioning

confidence: 99%

Coastal barrier stratigraphy for Holocene high-resolution sea-level reconstruction

Costas

Ferreira

Plomaritis

et al. 2016

Sci Rep

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The uncertainties surrounding present and future sea-level rise have revived the debate around sea-level changes through the deglaciation and mid- to late Holocene, from which arises a need for high-quality reconstructions of regional sea level. Here, we explore the stratigraphy of a sandy barrier to identify the best sea-level indicators and provide a new sea-level reconstruction for the central Portuguese coast over the past 6.5 ka. The selected indicators represent morphological features extracted from coastal barrier stratigraphy, beach berm and dune-beach contact. These features were mapped from high-resolution ground penetrating radar images of the subsurface and transformed into sea-level indicators through comparison with modern analogs and a chronology based on optically stimulated luminescence ages. Our reconstructions document a continuous but slow sea-level rise after 6.5 ka with an accumulated change in elevation of about 2 m. In the context of SW Europe, our results show good agreement with previous studies, including the Tagus isostatic model, with minor discrepancies that demand further improvement of regional models. This work reinforces the potential of barrier indicators to accurately reconstruct high-resolution mid- to late Holocene sea-level changes through simple approaches.

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“…Samples and standards were analyzed using highresolution gamma spectrometry to quantify 27 elements including K, Rb, Th and U (Dias and Prudêncio 2007). Dose rates from alpha, beta and gamma radiation were calculated from elemental concentrations and corrected for time averaged water content (for further details see Burbidge et al (2014)), which was constrained based on the measured values and the elevation of each sampling position relative to the water table. The dose rate from cosmic radiation was calculated for the site location and an estimate of the time averaged burial depth of each sample.…”

Section: Age Determinationmentioning

confidence: 99%

The Joint History of Tróia Peninsula and Sado Ebb-Delta

Rebelo

Brito

Burbidge³

et al. 2015

Coastal Research Library

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Traditionally, the study of coastal evolution has focused on emergent barriers or stratigraphic sequences on the adjacent shelf, but seldom are these two systems studied holistically or the information combined into a single model. Here, we combine data sets from the emerged and submerged sectors of a prograding coast, from the coastal dune to the innermost continental shelf, to reconstruct the long-term history of shelf reworking and spit elongation of Tr oia Peninsula in Portugal. This analysis involves synthesizing high-resolution reflection seismic profiles from the shoreface, Ground Penetrating Radar images from the emerged sand barrier, high resolution digital terrain models, and Optically Stimulated Luminescence and radiocarbon dating of sediment samples from the emergent sand barrier and backbarrier. The results document the growth of the sandy peninsula in five major phases of progradation represented by massive foredunes separated by hiatuses of sedimentation and periods of shoreline stability. Formation of the peninsula began circa 6,500 years ago by spit elongation from the south as documented by the oldest beach sediments within the spit. The spit enlarged until a tidal inlet was formed around 3,300 years ago, which caused the construction of the ebb-tidal delta. The latter sequestrated the sand supplied to the spit inhibiting spit progradation until the ebb delta reached an equilibrium volume, allowing shoreline

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Luminescence dating and associated analyses in transition landscapes of the Alto Ribatejo, central Portugal

Cited by 18 publications

References 37 publications

Distribution and chronological framework for Iberian variscite mining and consumption at Pico Centeno, Encinasola, Spain

Distribution and chronological framework for Iberian variscite mining and consumption at Pico Centeno, Encinasola, Spain

Coastal barrier stratigraphy for Holocene high-resolution sea-level reconstruction

The Joint History of Tróia Peninsula and Sado Ebb-Delta

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