Olufemi Adewale Osinuga, Rabiat Abisola Adeoye, Israel Adeyinka Adesenla, Victor Abiola Adeyoyin, Mayowa Shola Olutimi, Bolarinwa Ayoola Senjobi
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引用次数: 0
Abstract
Morphogenetic properties and geochemical compositions were analyzed and assessed to improve our understanding of pedogenesis and geochemistry of wetland soils on the Abeokuta formation of Ogun State, Nigeria. Three profiles were dug to a depth of 1.2 m except where the water table is high, and examined for their morphological, physical, chemical, and geochemical compositions using standard laboratory techniques. Gleying (mottles) were present in some of the subsurface horizons, and dark greyish colour dominates the soil matrix. The particle size is dominated by sand fractions and the clay fraction increases with depth. The soil pH was moderately acid to neutral (4.6–6.8) and the organic carbon contents were low to high (4.9–43.1 g/kg). The exchange site was dominated by Ca and Mg, while Fe and Mn contents were higher among the micronutrients. Kaolinite, quartz, and degraded mica were the dominant minerals in the clay fractions. The geochemical results reveal that the order of abundance of major oxides is SiO2 > Al2O3 > Fe2O3 > CaO > MgO > Na2O > TiO2 ≥ K2O. Geochemical indices point to a moderate degree of weathering and pedogenesis. Higher contents of SiO2 and Al2O3 and calcium in the surface layers indicate relative enrichment of minerals during weathering and nutrient cycling by vegetation.
期刊介绍:
The Arabian Journal of Geosciences is the official journal of the Saudi Society for Geosciences and publishes peer-reviewed original and review articles on the entire range of Earth Science themes, focused on, but not limited to, those that have regional significance to the Middle East and the Euro-Mediterranean Zone.
Key topics therefore include; geology, hydrogeology, earth system science, petroleum sciences, geophysics, seismology and crustal structures, tectonics, sedimentology, palaeontology, metamorphic and igneous petrology, natural hazards, environmental sciences and sustainable development, geoarchaeology, geomorphology, paleo-environment studies, oceanography, atmospheric sciences, GIS and remote sensing, geodesy, mineralogy, volcanology, geochemistry and metallogenesis.