On the reliability of estimates of the average chemical composition of the upper continental crust and river discharge

Yaroshevskii, A. A.

doi:10.1134/s0016702907110079

Cited by 4 publications

(6 citation statements)

References 3 publications

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“…A different pattern was dominant in soils overlying igneous rocks in the headwaters. Here, moderate and heavy REEs predominated, and total REE content was on average 21 % higher than in soils overlying sedimentary rocks, which is typical in soils developed over igneous rocks [20]. This pattern was also confirmed by the distribution of REEs in river channel sediments, where upstream sediments contained 30 % more total REEs than midstream and downstream sediments [10].…”

Section: Resultssupporting

confidence: 59%

“…Importantly, these elements also had significantly higher Cc values and clarke numbers in sedimentary rocks than in igneous rocks. For example, the clarke number of As in sedimentary rocks was 7.6 mg/kg, while in igneous rocks it was 1.7 mg/kg [20].…”

Section: Resultsmentioning

confidence: 99%

“…Factor 4 accounted for 7.6 % of the total variance. Elements that are typically found in higher concentrations in clays and clayey shales were positively correlated with this factor [20]. Conversely, elements typically found in a variety of sedimentary and igneous rocks were negatively correlated with this factor.…”

Section: Shared Local Soil Characteristicsmentioning

confidence: 93%

“…The background values were assumed to be the average element concentrations in the upper reaches of the Mzymta river at survey sites 1 -3. The indicative assessment scale of soil pollution hazard according to the total pollution index Zs consists of the following categories: permissible (less than 16); moderately dangerous (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32); dangerous (32-128); and extremely dangerous (more than 128) [17].…”

Section: Assessment Of Geochemical Characteristics and Contamination ...mentioning

confidence: 99%

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Elemental Composition of Soils in the Heterogeneous Geological Setting of the Mzymta River Basin on the Russian Black Sea Coast

Захарихина¹,

Kerimzade²,

Litvinenko³

2023

eer

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This study examines the regional geochemical anomalies in the soil of the Mzymta River valley in Russia, which was affected by large-scale construction works for the 2014 Winter Olympics. The study found that the elemental composition of soils not affected by human activity is influenced by the chemically rich parent rock and the presence of mineralized zones. The abundance and concentrations of excess and deficient elements in the soil were determined using mass spectrometry for 61 elements, and factor analysis was used to identify the causes of the variations observed. The study identified geochemical indicators that can predict soil-forming factors and revealed both natural and anthropogenic sources of chemical elements in the valley soils. Natural sources include geochemically rich rocks that contributed most significantly to the soil chemistry. The anthropogenic sources of elemental variation in the soil were a result of the construction of Olympic transit infrastructure using local geochemically rich materials. The heavy crushing and subsequent intense weathering of this material resulted in an increase in the concentration of excess elements in the soil compared to the parent rock or mineralized zones. This indicates a significant alteration of the soil's elemental composition due to construction activities in the area. The findings of this study can be applied to predict potential soil contamination in similar river valleys that are experiencing both natural and anthropogenic pressures.

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Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Shared Local Soil Characteristicsmentioning

confidence: 93%

Section: Assessment Of Geochemical Characteristics and Contamination ...mentioning

confidence: 99%

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Elemental Composition of Soils in the Heterogeneous Geological Setting of the Mzymta River Basin on the Russian Black Sea Coast

Захарихина¹,

Kerimzade²,

Litvinenko³

2023

eer

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“…Therefore, we inferred that HZM-1 and HZM-4 are likely to affect the enrichment of elements around coal seams. Compared with the mean composition of clay shale (Grigor'ev, 2003), the studied tonsteins are characterized by high concentrations of Nb and Ta (Fig. 12).…”

Section: Leaching Of the Tonsteins Within Coal Seamsmentioning

confidence: 97%

Geochronology, Mineralogy, and Geochemistry of the Tonsteins from the Permo–Carboniferous Benxi Formation, Ordos Basin, North China Craton

WANG

ZHANG

et al. 2023

Acta Geologica Sinica (Eng)

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Tonstein layers are found worldwide in the Permo‐Carboniferous coal‐bearing strata. This study investigates the geochronology, mineralogy, and geochemistry of four tonstein samples from the Permo‐Carboniferous Benxi Formation, Ordos Basin, North China Craton (NCC). The typical features of the studied tonsteins include thin beds, lateral continuity, angular quartz grains, and euhedral zircons with similar U–Pb ages, indicating a significant pyroclastic origin. In addition, the tonstein samples have low TiO2/Al2O3 ratios (< 0.02) and rare earth elements and yttrium (REY) concentrations with obvious negative Eu anomalies, indicating that the tonsteins have a felsic magma origin. Moreover, compared with the mean composition of clay shale, the studied tonsteins are characterized by high concentrations of the elements Nb and Ta, which may affect the concentration of the corresponding elements in surrounding coal seams. The zircon U–Pb ages of the tonsteins (293.9–298.8 Ma) provide a precise chronological framework on the Benxi Formation in the Ordos Basin, constraining the Gzhelian‐Aselian stages. The tonsteins were probably sourced from arc volcanism along the western margin of the NCC during the Early Permian, implying that the Alxa Terrane had not amalgamated with the NCC at that time.

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Estimating the average concentration of minor and trace elements in surficial sediments using fractal methods

Ma¹,

Li²,

Lü³

2014

Journal of Geochemical Exploration

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On the reliability of estimates of the average chemical composition of the upper continental crust and river discharge

Cited by 4 publications

References 3 publications

Elemental Composition of Soils in the Heterogeneous Geological Setting of the Mzymta River Basin on the Russian Black Sea Coast

Elemental Composition of Soils in the Heterogeneous Geological Setting of the Mzymta River Basin on the Russian Black Sea Coast

Geochronology, Mineralogy, and Geochemistry of the Tonsteins from the Permo–Carboniferous Benxi Formation, Ordos Basin, North China Craton

Estimating the average concentration of minor and trace elements in surficial sediments using fractal methods

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