Geochemical normalization of magnetic susceptibility for investigation of floodplain sediments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F18%3A43893826" target="_blank" >RIV/44555601:13520/18:43893826 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985530:_____/18:00488520 RIV/61388980:_____/18:00488520 RIV/61989592:15310/18:73591992

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s12665-018-7371-0" target="_blank" >https://link.springer.com/article/10.1007/s12665-018-7371-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s12665-018-7371-0" target="_blank" >10.1007/s12665-018-7371-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Geochemical normalization of magnetic susceptibility for investigation of floodplain sediments

Popis výsledku v původním jazyce

Magnetic susceptibility (MS) is commonly used as a proxy for industrial pollution in natural sediments or as a proxy for the percentage of detrital components in peat or carbonates. The MS may also reflect the geology of the sediment source and post-depositional processes in sediments, such as soil development. The aim of our research was to test the usefulness of Fe-normalized mass-specific MS (chi) and Ti-normalized Fe in a study of floodplain sediments. We sampled 27 floodplain sediment cores from several geologically different catchments throughout the Czech Republic, analysed their Fe and Ti concentrations using X-ray fluorescence spectroscopy, and determined their chi. To decipher sediment grain-size dependence and possible magnetic enrichment, background functions for chi were constructed using similar approach as that used for geochemical background functions of the risk element concentrations with Fe concentrations as an independent variable. It provides a mechanism to calculate chi of sediments as it would be &quot;pristine&quot;, i.e. without post-depositional changes and pollution. Sediments derived from &quot;mafic&quot; source rocks had chi/Fe larger by two orders of magnitude than sediments derived from &quot;felsic&quot; rocks. Sediments derived from &quot;mafic&quot; source rocks also exhibit lower mean Fe/Ti ratio in pristine sediment strata than the average upper continental crust. The magnetic carriers inherited from mafic rocks are stepwise destroyed by pedogenesis in the floodplains and thus slowly approach chi of sediments derived from felsic rocks. Gleying processes may change chi/Fe, Fe/Ti ratio allows identifying a past action of those post-depositional processes.

Název v anglickém jazyce

Geochemical normalization of magnetic susceptibility for investigation of floodplain sediments

Popis výsledku anglicky

Magnetic susceptibility (MS) is commonly used as a proxy for industrial pollution in natural sediments or as a proxy for the percentage of detrital components in peat or carbonates. The MS may also reflect the geology of the sediment source and post-depositional processes in sediments, such as soil development. The aim of our research was to test the usefulness of Fe-normalized mass-specific MS (chi) and Ti-normalized Fe in a study of floodplain sediments. We sampled 27 floodplain sediment cores from several geologically different catchments throughout the Czech Republic, analysed their Fe and Ti concentrations using X-ray fluorescence spectroscopy, and determined their chi. To decipher sediment grain-size dependence and possible magnetic enrichment, background functions for chi were constructed using similar approach as that used for geochemical background functions of the risk element concentrations with Fe concentrations as an independent variable. It provides a mechanism to calculate chi of sediments as it would be &quot;pristine&quot;, i.e. without post-depositional changes and pollution. Sediments derived from &quot;mafic&quot; source rocks had chi/Fe larger by two orders of magnitude than sediments derived from &quot;felsic&quot; rocks. Sediments derived from &quot;mafic&quot; source rocks also exhibit lower mean Fe/Ti ratio in pristine sediment strata than the average upper continental crust. The magnetic carriers inherited from mafic rocks are stepwise destroyed by pedogenesis in the floodplains and thus slowly approach chi of sediments derived from felsic rocks. Gleying processes may change chi/Fe, Fe/Ti ratio allows identifying a past action of those post-depositional processes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/GA15-00340S" target="_blank" >GA15-00340S: Antropogenní znečištění a stavba říčních niv: dva fenomény a jediný příběh</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Environmental Earth Sciences

ISSN

1866-6280

e-ISSN

—

Svazek periodika

2018

Číslo periodika v rámci svazku

77

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

189," nestránkováno"

Kód UT WoS článku

000427354000038

EID výsledku v databázi Scopus

—