Thursday, December 18, 2025
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The sources primarily offer a technical overview of Accelerator Mass Spectrometry (AMS), particularly its application in cosmogenic nuclide dating for geological and environmental studies. One source details the principles and components of AMS, explaining its high sensitivity for measuring rare, long-lived radioisotopes like $^{14}\text{C}$ and $^{10}\text{Be}$. The other sources focus on utilizing these cosmogenic nuclides, such as paired $^{10}\text{Be}$ and $^{26}\text{Al}$, to determine exposure ages, erosion rates, and sediment burial histories in various landscapes, including glacial and fluvial environments. Crucial aspects of cosmogenic dating, such as sample preparation techniques, field sampling strategies (especially in glacial settings), and the interpretation of erosion rate discordance in detrital sediments, are thoroughly discussed. Additionally, a peripheral source presents information on geochemical data analysis using the CoDaPack software, suggesting applications in geological exploration.
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P. Geo. Ricardo A Valls, M. Sc. and Geo Gadfly
Valls Geoconsultant
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@valls_geoconsultant #ErosionSecret #GeochemicalExploration #CosmogenicNuclides #AMSScience
References
Balco, G. (n.d.). The online calculators formerly known as the CRONUS-Earth online calculators (Version 3). Cosmogenic Nuclide Lab, University of Washington.
Bierman, P. R., Bender, A. M., Christ, A. J., Corbett, L. B., Halsted, C. T., Portenga, E. W., & Schmidt, A. H. (2021). Dating by cosmogenic nuclides. [Source unknown, possibly a treatise], 101–115.
Fifield, L. K. (2003). Accelerator Mass Spectrometry. [Source unknown], 461–487.
Halsted, C. T., Bierman, P. R., Codilean, A. T., Corbett, L. B., & Caffee, M. W. (2025). Global analysis of in situ cosmogenic 26Al and 10Be and inferred erosion rate ratios in modern fluvial sediments indicates widespread sediment storage and burial during transport. Geochronology, 7, 213–228.
Schmidt, C., Mair, D., Akçar, N., Christl, M., Haghipour, N., Vockenhuber, C., Gautschi, P., & Schlunegger, F. (2025). Quantifying erosion in a pre-Alpine catchment at high resolution with concentrations of cosmogenic 10Be, 26Al, and 14C. EGUsphere, 2025, 1–31.
Valls, R. (n.d.). Curso CoDaPack Extracción de toda la información de sus datos geoquímicos [Video transcript]. YouTube.
Valls, R. (n.d.). Erosional level restream [Video transcript]. YouTube.
Willenbring, J. K., & von Blanckenburg, F. (2010). Meteoric cosmogenic Beryllium-10 adsorbed to river sediment and soil: applications for Earth-surface dynamics. Earth-Science Reviews, 98(1-2), 105–122.
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