Revisiting a proof of concept in quartz-OSL bleaching processes using sands from a modern-day river (the Séveraisse, French Alps)

Rizza, Magali; Rixhon, Gilles; Valla, Pierre G.; Gairoard, Stéphanie; Delanghe, Doriane; Fleury, Jules; Tal, Michal; Groleau, Solveig

doi:10.1016/j.quageo.2024.101520

Quaternary Geochronology

2024

DOI: 10.1016/j.quageo.2024.101520

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Revisiting a proof of concept in quartz-OSL bleaching processes using sands from a modern-day river (the Séveraisse, French Alps)

Magali Rizza,

Gilles Rixhon,

Pierre G. Valla

et al.

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Interpreting depositional environments from modern floodplain sediments using optically stimulated luminescence

Langston,

Marcotte,

Neudorf

et al. 2024

Boreas

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We investigate how luminescence signals imprinted on fluvial sediments vary depending on the depositional environment and vary through time in the same river. We collected sediment samples from four geomorphically distinct locations on the modern floodplain and modern point bar on the Buffalo River in northwest Arkansas, USA, in order to determine if different depositional environments are associated with distinct bleaching characteristics in the sediments. Our analysis revealed that all samples from different depositional environments yielded ages consistent with modern deposition. The samples collected from the floodplain and bar head contained a higher proportion of grains with residual doses, indicative of incomplete bleaching during transport, while samples from the mid‐bar and bar tail appeared well bleached. Our results are particularly intriguing for two significant reasons. First, they highlight distinct equivalent dose distributions in different depositional environments. Second, they shed light on an intriguing relationship: despite generally well‐bleached modern floodplain samples, ancient sediments from corresponding terraces displayed equivalent dose (De) distributions that suggest partial bleaching in some cases. This research contributes to the growing body of work that seeks to establish a relationship between luminescence properties and sediment transport processes and offers valuable insight into how luminescence signals vary locally in modern fluvial deposits, which can help guide the interpretation of older fluvial deposits.

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Interpreting depositional environments from modern floodplain sediments using optically stimulated luminescence

Langston,

Marcotte,

Neudorf

et al. 2024

Boreas

View full text Add to dashboard Cite

show abstract

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Revisiting a proof of concept in quartz-OSL bleaching processes using sands from a modern-day river (the Séveraisse, French Alps)

Cited by 1 publication

References 61 publications

Interpreting depositional environments from modern floodplain sediments using optically stimulated luminescence

Interpreting depositional environments from modern floodplain sediments using optically stimulated luminescence

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