Articles | Volume 7, issue 2
https://doi.org/10.5194/esurf-7-393-2019
https://doi.org/10.5194/esurf-7-393-2019
Research article
 | 
02 May 2019
Research article |  | 02 May 2019

Cosmogenic 10Be in river sediment: where grain size matters and why

Renee van Dongen, Dirk Scherler, Hella Wittmann, and Friedhelm von Blanckenburg

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Cited articles

Aguilar, G., Carretier, S., Regard, V., Vassallo, R., Riquelme, R., and Martinod, J.: Grain size-dependent 10Be concentrations in alluvial stream sediment of the Huasco Valley, a semi-arid Andes region, Quat. Geochronol., 19, 163–172, https://doi.org/10.1016/j.quageo.2013.01.011, 2014. 
Allen, P. A., Armitage, J. J., Whittaker, A. C., Michael, N. A., Roda-boluda, D., and Arcy, M. D.: Fragmentation Model of the Grain Size Mix of Sediment Supplied to Basins, J. Geol., 123, 405–427, https://doi.org/10.1086/683113, 2015. 
Anderson, S. P., von Blanckenburg, F., and White, A.: Physical and Chemical Controls on the Chritical Zone, Elements, 3, 315–319, https://doi.org/10.2113/gselements.3.5.315, 2007. 
Attal, M. and Lavé, J.: Pebble abrasion during fluvial transport: Experimental results and implications for the evolution of the sediment load along rivers, J. Geophys. Res.-Earth, 114, 1–22, https://doi.org/10.1029/2009JF001328, 2009. 
Attal, M., Mudd, S. M., Hurst, M. D., Weinman, B., Yoo, K., and Naylor, M.: Impact of change in erosion rate and landscape steepness on hillslope and fluvial sediments grain size in the Feather River basin (Sierra Nevada, California), Earth Surf. Dynam., 3, 201–222, https://doi.org/10.5194/esurf-3-201-2015, 2015. 
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Short summary
The concentration of cosmogenic 10Be is typically measured in the sand fraction of river sediment to estimate catchment-average erosion rates. Using the sand fraction in catchments where the 10Be concentrations differ per grain size could potentially result in biased erosion rates. In this study we investigated the occurrence and causes of grain size-dependent 10Be concentrations and identified the types of catchments which are sensitive to biased catchment-average erosion rates.