The efficiency of elemental geochemistry and weathering indices as tracers in aeolian sediment provenance fingerprinting

A - Papers appearing in refereed journals

Nosrati, K., Moradian, H., Dolatkordestani, M., Mol, L. and Collins, A. L. 2022. The efficiency of elemental geochemistry and weathering indices as tracers in aeolian sediment provenance fingerprinting. Catena. 210 (March 2022), p. 105932. https://doi.org/10.1016/j.catena.2021.105932

AuthorsNosrati, K., Moradian, H., Dolatkordestani, M., Mol, L. and Collins, A. L.
Abstract

Confirmation of cost-effective and reliable tracers for aeolian sediment (sand dune) source fingerprinting warrants further research. Accordingly, the main objective of the work reported in this paper was to investigate the efficiency of weathering indices in aeolian sediment fingerprinting using a case study of a fragile arid region in Qom Province, Iran. Eight geochemical elements (Al, Ca, Fe, K, Na, Mg, Si, Ti) and 17 associated weathering indices were measured in 34 aeolian source samples and 10 sand dune target sediment samples in three absolute particulate size fractions. For each fraction, three final composite fingerprints (i.e., geochemical elements only, weathering indices only and a combination of the two) for discerning and ascribing the aeolian sediment sources were selected. The Modified MixSIR Bayesian un-mixing model was used to apportion aeolian source contributions using the final composite fingerprints. Regardless of the composite fingerprint used, all results across the different size fractions suggested that the south-eastern alluvial fan is the dominant (average contribution 50.6%, SD 19.0%) source of the sand dune samples, with the western alluvial fan being the second most important (average contribution 38.4%, SD 20.4%) source. Comparisons of the posterior distributions for the predicted source proportions generated using the nine composite fingerprints (three kinds of composite fingerprints*three particle size fractions) showed that the composite fingerprints combining the geochemical elements and weathering indices generated the most powerful source material discrimination. Our results demonstrate the use of weathering indices alongside more conventional elemental geochemistry tracers for investigations into sand dune sediment provenance.

KeywordsModified MixSIR; Sand dune tracing; Weathering; Mulch; Wind break
Year of Publication2022
JournalCatena
Journal citation210 (March 2022), p. 105932
Digital Object Identifier (DOI)https://doi.org/10.1016/j.catena.2021.105932
Web address (URL)https://doi.org/10.1016/j.catena.2021.105932
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeS2N - Soil to Nutrition - Work package 3 (WP3) - Sustainable intensification - optimisation at multiple scales
98006889 - Iran National Science Foundation (INSF)
Georg Forster Research Fellowships program - Alexander von Humboldt Foundation
Output statusPublished
Publication dates
Online10 Dec 2021
Publication process dates
Accepted29 Nov 2021
PublisherElsevier Science Bv
ISSN0341-8162

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