Aeolian sand provenance variability during the Last Glacial Period in the Moravian Sahara dune field, Czechia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00143326" target="_blank" >RIV/00216224:14310/25:00143326 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0169555X25004428" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169555X25004428</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.geomorph.2025.110032" target="_blank" >10.1016/j.geomorph.2025.110032</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Aeolian sand provenance variability during the Last Glacial Period in the Moravian Sahara dune field, Czechia

Popis výsledku v původním jazyce

The Moravian Sahara dune field represents a unique environment, as it formed episodically during the Last Glacial Period and reflects a change in atmospheric circulation. Nevertheless, a precise evaluation of the sources of aeolian sand has not yet been performed despite extensive past research. Here, we present a study comparing element concentrations and ratios (specifically, Fe/Si, Ti/Si, and V/Si) measured via X-ray fluorescence (XRF) spectroscopy among samples collected from presumed source sediments and aeolian sand from the dunes. Additionally, we verified the correctness of the definition of boundaries between the aeolian units/dune generations through cluster analysis of element concentrations in the drilled cores. This relatively quick method has been shown to be a helpful proxy for defining individual dune generations. The element ratios revealed that the aeolian sand that formed the Moravian Sahara dunes originated from two primary sources, fluvial sediments deposited by the Morava paleo-river and the streams draining the Central Moravian Carpathians, whose contributions varied over time and reflected the changes in prevailing winds. The contribution of the first source is, however, overestimated, which probably reflects that the Morava palaeo-river already transported sediments from the Central Moravian Carpathians before reaching the study area, recycling of old aeolian sand and contamination of dune material in one particular place by water used during firefighting in 2012, which was pumped from the Morava river.

Název v anglickém jazyce

Aeolian sand provenance variability during the Last Glacial Period in the Moravian Sahara dune field, Czechia

Popis výsledku anglicky

The Moravian Sahara dune field represents a unique environment, as it formed episodically during the Last Glacial Period and reflects a change in atmospheric circulation. Nevertheless, a precise evaluation of the sources of aeolian sand has not yet been performed despite extensive past research. Here, we present a study comparing element concentrations and ratios (specifically, Fe/Si, Ti/Si, and V/Si) measured via X-ray fluorescence (XRF) spectroscopy among samples collected from presumed source sediments and aeolian sand from the dunes. Additionally, we verified the correctness of the definition of boundaries between the aeolian units/dune generations through cluster analysis of element concentrations in the drilled cores. This relatively quick method has been shown to be a helpful proxy for defining individual dune generations. The element ratios revealed that the aeolian sand that formed the Moravian Sahara dunes originated from two primary sources, fluvial sediments deposited by the Morava paleo-river and the streams draining the Central Moravian Carpathians, whose contributions varied over time and reflected the changes in prevailing winds. The contribution of the first source is, however, overestimated, which probably reflects that the Morava palaeo-river already transported sediments from the Central Moravian Carpathians before reaching the study area, recycling of old aeolian sand and contamination of dune material in one particular place by water used during firefighting in 2012, which was pumped from the Morava river.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

GEOMORPHOLOGY

ISSN

0169-555X

e-ISSN

1872-695X

Svazek periodika

491

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

1-15

Kód UT WoS článku

001596375400002

EID výsledku v databázi Scopus

2-s2.0-105017901843