Ancient deposition environment, mechanism of deposition and textural attributes of Ajali Formation, western flank of the Anambra Basin, Nigeria

Ilevbare, M.; Omodolor, H.E

doi:10.1016/j.cscee.2020.100022

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Generally, REEs content increase with decreasing particle size and with increasing proportion of clay content (Rao et al, (2011);Kimoto et al, (2006). Ilevbare and Imasuen, (2020) ; Ilevbare and Omodolor, (2020) from their study revealed that the textural parameters show that the Ajali Sandstone are medium sand, poorly to moderately sorted, coarse to strongly coarse skewed with mesokurtic to leptokurtic grains shows a coarsening upward sequence, with dispersed intercalations of clay, been predominately sand/sandstone. The little or no clay within the Ajali Sandstone together with the increasing particle size of the grains, explains why the REEs of the Formation are very low, which is consistent with the already established trend by Rao et al, (2011) ;Kimoto et al, (2006).…”

Section: Fig 2 Ree Concentrations Of Ajali Sandstone At Fugarmentioning

confidence: 94%

Rare Earth Elements of Ajali Sandstone, SW, Anambra Basin in Nigeria: Implication for Soil Genesis

Ilevbare¹

2021

jasem

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The Ajali Sandstone, South-western, Anambra Basin, was studied for Rare Earth Elements (REEs), using a Phillips 45 channel Inductively Coupled Plasma (ICP) Emission Spectrometer. The standard deviation of the REEs (Dy, Er, Eu, Y, Yb, La and Nd) averages 3.5 mg/L, 0.34 mg/L, 0.32 mg/L, 3.93 mg/L, 1.96 mg/L, 4.02 mg/L and 2.24 mg/L respectively for each of the sampled locations. The REEs concentrations showed both positive and negative concentration anomalies. The enrichment or depletion of the REEs is generally attributed to their tendency to be incorporated into plagioclase preferentially over other minerals. The Ajali Formation is predominantly sand/sandstone, with clay occurring only as intercalations/thin beds of clay drapes with the increasing particle size of the sand grains, makes the rate of adsorption and distribution of REEs in the soil low, and explains the low values of REEs concentration. Soil organic matter (SOC) plays an important role in the adsorption and migration of REEs in the Ecosystems. The SOC is linearly associated with REEs Concentration as it increases with increasing content of SOC. The Ajali Sandstone studied falls in the vicinity of abandoned cropland to cropland in a lower/gentle slope region, correspondingly low in soil organic matter content and as such slow rate of distribution and migration of REEs concentrations in the Ajali Sandstone. The sesquioxides such as Fe oxides increases as REEs contents increases. The 0.46 mean value of Fe2O3 in the Sandstone of the area studied implies a low REEs adsorption rate and subsequently the very low REEs concentrations of the soils. The istribution of REEs within the Ajali Formation soils were grossly affected by the factors that influenced the adsorption and migration rate of the minerals during magmatic fractionation process, hence the low REEs concentration of the Sediments. Keywords`: Sansdstone, Anambra Basin, Rare Earth Elements, Magmatic fractionation

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Section: Fig 2 Ree Concentrations Of Ajali Sandstone At Fugarmentioning

confidence: 94%

Rare Earth Elements of Ajali Sandstone, SW, Anambra Basin in Nigeria: Implication for Soil Genesis

Ilevbare¹

2021

jasem

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“…The basin has complex landforms and diverse causes, forming various types of landforms such as plains, deserts, Loess Plateau, hills, and mountains 6 , 7 . Different depositional environments have influenced soil structure and changed soil physical properties 8 . Soil particle size distribution (PSD) is an important indicator in sedimentological studies, and its characteristics often reflect different depositional dynamics, depositional environment, and source characteristics 9 – 11 .…”

Section: Introductionmentioning

confidence: 99%

Identification of soil particle size distribution in different sedimentary environments at river basin scale by fractal dimension

Wang

Zhan

et al. 2022

Sci Rep

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The geomorphology of river basin is complex, and its soil sedimentary characteristics are poorly defined. To study the spatial variability of soil structure in different sedimentary environments at the basin scale, 356 sets of soil samples were collected from five typical sedimentary environments in the Yellow River Basin and the Haihe River Basin, including the upper and lower reaches of the rivers, mountain-front plains, central alluvial plains and eastern coastal plains. The particle size distribution (PSD) of the soil samples was obtained using a laser particle size analyzer, and the fractal dimension (D) of the soil structure was derived by applying fractal theory. The PSD, D and the correlation between them were analyzed by the Pearson correlation method for typical sedimentary environments in two basins. The results show that: (1) The main soil types in the typical geological environments in the basin are sand, loamy sand, sandy loam, silty loam, and silty soil. The soil particle size in the upper and lower reaches of the rivers was higher than that in the plain areas. (2) In the plane, The D value descended in different regions in the following order: the mountain-front plain > the eastern coastal plain > the upper Yellow River > the central alluvial plain > the lower Yellow River. In the vertical direction for both rivers, the D value showed a decreasing trend with increasing burial depth. (3) The model results showed a cubic polynomial correlation between D values and PSD, which was closely related to the non-uniformity of particle size during sorting and deposition. The soil PSD and fractal characteristics are effective tools for the quantitative evaluation of soil structure in various sedimentary environments in the basin.

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Anthropogenic Effects of Coal Mining on Water Resources in Parts of Northern Anambra Basin, North–central, Nigeria

Musa,

Akpah,

Akudo

et al. 2024

Earth Sciences and Human Constructions

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The coal mining activities within the study area have produced high concentrations of potentially toxic elements with acidity in the water resources leading to pollution and environmental degradation. This paper considers evaluating the level of contamination of most of these potential toxic elements through the determination of physical parameters, and chemical and heavy metal concentrations in water using standard fields and laboratory methods such as an auto meter from Hanna Instruments, the Atomic Absorption Spectrophotometer (AAS), and the Hach DR/2010 spectrophotometer. The results show the mean concentration values of 0.0225 mg/l, 0.048 mg/l, 0.6346 mg/l, 0.0359 mg/l, 0.2506 mg/l, 0.0476 mg/l, 0.00125 mg/l, and 0.7295 mg/l for Al, Cd, Cr, As, Fe, Pb, Hg, and Zn, respectively. The mean concentrations of heavy metals in the water samples occur in decreasing order as, Zn > Cr > Fe > Cd > Pb > As > Al > Hg. The results also reveal the presence of high anthropogenic concentrations of potentially toxic elements such as Zinc (Zn), Chromium (Cr), Iron (Fe), Lead (Pb), Sulfate (SO4), and total dissolved solids while, low pH (acidic) values suggests that the water is acidic and of high health risk to humans.

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Ancient deposition environment, mechanism of deposition and textural attributes of Ajali Formation, western flank of the Anambra Basin, Nigeria

Cited by 3 publications

References 16 publications

Rare Earth Elements of Ajali Sandstone, SW, Anambra Basin in Nigeria: Implication for Soil Genesis

Rare Earth Elements of Ajali Sandstone, SW, Anambra Basin in Nigeria: Implication for Soil Genesis

Identification of soil particle size distribution in different sedimentary environments at river basin scale by fractal dimension

Anthropogenic Effects of Coal Mining on Water Resources in Parts of Northern Anambra Basin, North–central, Nigeria

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