Magnetic properties of surface sediments as proxies of recent anthropogenic pollution in the Anllóns riverbed (NW Spain)

Costanzo-Alvarez, V.; Rey, Rosa Devesa; Aldana, Milagrosa; Barral, María Teresa; López-Rodríguez, Diego; Andrade, Belkys

doi:10.1007/s12665-017-6785-4

Cited by 9 publications

(4 citation statements)

References 72 publications

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“…For analysis of IRM curves, a direct signal analysis (DSA) was applied to the experimental IRM. The DSA method has been widely described by Aldana et al (1994, 2011) and has been used to analyse IRM curves obtained from archaeological samples (Rada Torres et al, 2011), sedimentary rocks (Costanzo-Álvarez et al, 2012, 2019), soils (Costanzo-Álvarez et al, 2017a), and synthetic samples (Costanzo-Álvarez et al, 2017b). Figure 3A and B shows the experimental and fitted curves for the shallow sample of core CH04/2, as well as the spectral histogram obtained.…”

Section: Resultsmentioning

confidence: 99%

Testing lake-level reconstructions based on rock magnetic proxies for the sediment record of Laguna Cháltel (Patagonia, Argentina)

Irurzun¹,

Palermo²,

Gogorza³

et al. 2020

Quat. res.

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This study was carried out on sediment cores collected with a gravity corer from Laguna Cháltel, an almost circular crater lake located in Patagonia, Argentina (49.9°S, 71°W). The main magnetic carrier was Ti-magnetite in the pseudo–single domain range. A model using magnetic grain size and concentration, previously applied to Laguna Potrok Aike to infer lake-level changes, was used for Laguna Cháltel. The main requirement to apply the model is uniform magnetic mineralogy, which is the case for Laguna Cháltel. After magnetic data were compared with previously studied lake levels, it was found that the magnetic proxies that best follow hydrologic changes are ARM/SIRM (anhysteretic remanent magnetisation/saturation of isothermal remanent magnetisation) and ARM. The concentration proxy (ARM measured with a 100 mT alternating field and 0.05 mT direct field) was also used as wind indicator. High wind strength was found at around 3650 cal yr BP, and low wind strength for the last century. ARM/SIRM and ARM were used to infer the strength of fluvial runoff into the lake for a core collected close to the shore and near a tributary. The results show that the magnetic model is promising for inferring lake-level variations, particularly in Patagonian lakes.

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Section: Resultsmentioning

confidence: 99%

Testing lake-level reconstructions based on rock magnetic proxies for the sediment record of Laguna Cháltel (Patagonia, Argentina)

Irurzun¹,

Palermo²,

Gogorza³

et al. 2020

Quat. res.

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“…[76][77][78] Geochemical and environmental magnetic study of high As sediments from Datong showed that maghemite and hematite are the dominant carriers of As in aquifer sediments. 36 Moreover, magnetic properties of surface sediments are highly correlated with the degree of As contamination in NW Spain, 79 which was attributed to the fact that the surfaces of iron oxides can effectively extract As from aqueous solutions. 31,80 Most notably, one sample with an anomalously high hematite content of 53% has a significant magnetism, which was interpreted to arise from the Environmental Science: Nano Paper transformation of fine-grained magnetite and/or maghemite to hematite.…”

Section: Implications For Magnetic Enhancement Of High As Soils and S...mentioning

confidence: 99%

“…31,80 Most notably, one sample with an anomalously high hematite content of 53% has a significant magnetism, which was interpreted to arise from the Environmental Science: Nano Paper transformation of fine-grained magnetite and/or maghemite to hematite. 79 Indeed, maghemite formation during pedogenesis is an intermediate step in the pathway of magnetite transformation to hematite. 21,41,42 Our study shows that the presence of As(V) weakens the ferrimagnetic susceptibility of freshly coprecipitated As(V)-ferrihydrite but causes a significant increase in magnetic susceptibility of crystalline iron (oxyhydr) oxides (e.g.…”

Section: Implications For Magnetic Enhancement Of High As Soils and S...mentioning

confidence: 99%

Magnetic and structural characteristics associated with the transformation of As(v)-coprecipitated ferrihydrite to hematite: implications for magnetic enhancement in soils and sediments

Zhang,

Tang,

Lin

et al. 2024

Environ. Sci.: Nano

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“…1 a 2). Mocnost přípovrchové vrstvy se zvýšenými hodnotami magnetické susceptibility lze použít jako proxy ukazatel nejmladší agradace nivy po začátku průmyslové revoluce (Desenfant et al 2004;Knab et al 2006;Costanzo-Álvarez et al 2017). Zrnitost, LOI a pH slouží jako doplňkové parametry pro dokreslení charakteru sedimentace a pedogeneze na lokalitách profilů.…”

Section: úVodunclassified

Vliv sedimentačního prostředí na magnetickou susceptibilitu přelivových sedimentů nivy Moravy ve Strážnickém Pomoraví

Ježková

Máčka

2020

Geologické výzkumy

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Four profiles in different sedimentary environments - natural levee, proximal floodplain, distal floodplain, oxbow lake - were sampled to obtain magnetic susceptibility (MS), grain size, organic matter content (LOI) and pH. Relationships between selected parameters (χlf, D50, LOI, pH) were analysed by means of statistical analysis (linear regression, PCA, factor analysis). Principal goal was to investigate how character of individual sedimentary environments and their distance from the active river channel is reflected in the magnetic signal of overbank deposits. A decrease in the magnetic signal with increasing distance from the river channel was shown, confirming that fluvial deposition is a major factor of contamination of floodplain sediments by anthropogenic magnetic particles. The base of elevated values of MS (levee: 80 cm, proximal floodplain: 30 cm) probably corresponds to the turn of the 19th and 20th century and the strongest magnetic signal (levee: 32,5 cm, proximal floodplain: 5 cm) belongs to the 1980s. Statistically significant relationships were found between: χlf and LOI (direct dependence), LOI and D50 (indirect dependence), pH and D50 (direct dependence) when data from all profiles were analysed together.

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Magnetic properties of surface sediments as proxies of recent anthropogenic pollution in the Anllóns riverbed (NW Spain)

Cited by 9 publications

References 72 publications

Testing lake-level reconstructions based on rock magnetic proxies for the sediment record of Laguna Cháltel (Patagonia, Argentina)

Testing lake-level reconstructions based on rock magnetic proxies for the sediment record of Laguna Cháltel (Patagonia, Argentina)

Magnetic and structural characteristics associated with the transformation of As(v)-coprecipitated ferrihydrite to hematite: implications for magnetic enhancement in soils and sediments

Vliv sedimentačního prostředí na magnetickou susceptibilitu přelivových sedimentů nivy Moravy ve Strážnickém Pomoraví

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