What are the physical and chemical characteristics of alluvium deposits?
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Alluvium deposits exhibit diverse physical and chemical properties based on their geological origins. Studies on alluvial soils in various regions reveal key characteristics. These deposits can contain minerals like quartz, kaolinite, and smectite, with varying textures ranging from silty clay loam to silty clay. The soils may have acidic pH levels, high organic carbon content in the topsoil, and moderate to high levels of available phosphorus and exchangeable calcium. Additionally, alluvium can show fluctuations in base saturation and aluminum saturation. Alluvial formations are known for their distinct mechanical and mineralogical composition, thickness, and paleontological content, reflecting climatic rhythms and oscillation stages. The presence of inorganic constituents like fluoride and nitrate in alluvial soils further influences their chemical composition.
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|---|---|
| Alluvial deposits on Chongming Island in Shanghai show varying physico-chemical properties influenced by marine and fluvial deposits, impacting Na+, Cl−, CO3 2−, HCO3 −, and SO4 2− contents. | |
2 Citations | Alluvium deposits exhibit varying cementation, color changes, mineral composition (kaolinite, hydromica), and unstable mineral predominance. These characteristics differ based on climatic and orographic conditions in different dynamic phases. |
| The alluvium deposits in Gomti basin contain fluoride (0.2-4.0mg/l) and nitrate (<1.0-246mg/l). They consist of older ultisol and newer inceptisols, forming part of the middle Ganga plain. | |
| Physical characteristics of alluvium soils include poor drainage, low bulk density, and silty clay texture. Chemical properties show acidic pH, high organic C, moderate P, and exchangeable Ca. | |
| Not addressed in the paper. |
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