In geology, eluvium or eluvial deposits are geological deposits and soils that are derived by in situweathering or weathering plus gravitational movement or accumulation.
The process of removal of materials from geological or soil horizons is called eluviation or leaching. There is a difference in the usage of this term in geology and soil science. In soil science, eluviation is the transport of soil material from upper layers of soil to lower levels by downward percolation of water across soil horizons, and accumulation of this material (illuvial deposit) in lower levels is called illuviation.[1][2] In geology, the removed material is irrelevant, and the deposit (eluvial deposit) is the remaining material. Eluviation occurs when precipitation exceeds evaporation.
A soil horizon formed due to eluviation is an eluvial zone or eluvial horizon. In a typical soil profile, the eluvial horizon refers to a light-colored zone located (depending on context and literature) either at the lower part of the A horizon (symbol: Ae) or within a distinct horizon (E horizon) below the A, where the process is most intense and rapid. Yet some sources consider the eluvial zone to be the A horizon plus the (distinct) E horizon, as eluviation technically occurs in both.
The strict eluvial horizon (E horizon) is typically light gray, clay-depleted, contains little organic matter and has a high concentration of silt and sand particles composed of quartz and other resistant minerals.
^"Glossary of Terms". PhysicalGeography.net. Retrieved 2006-11-11.
Gupta, Chiranjib Kumar (2002) Chemical Metallurgy: Principles and Practice, Wiley, ISBN3-527-30376-6
Cronan, David Spencer (1999) Handbook of Marine Mineral Deposits, CRC Press, ISBN0-8493-8429-X
Swiecki, Rafal (2006) Eluvial Placers Accessed 18 April 2006
Van Hees, Edmond H., (2002) Supergene Phosphate Enrichment in Carbonatite-Derived Eluvial Sediments: Agrium Phosphate Mine, Kapuskasing, Ontario, Canada, The Geological Society of America (GSA) abstract. 2016-10-21 at the Wayback Machine Accessed 18 April 2006
April 13, 2024
eluvium, musician, musician, geology, eluvium, eluvial, deposits, geological, deposits, soils, that, derived, situ, weathering, weathering, plus, gravitational, movement, accumulation, process, removal, materials, from, geological, soil, horizons, called, eluv. For the musician see Eluvium musician In geology eluvium or eluvial deposits are geological deposits and soils that are derived by in situ weathering or weathering plus gravitational movement or accumulation The process of removal of materials from geological or soil horizons is called eluviation or leaching There is a difference in the usage of this term in geology and soil science In soil science eluviation is the transport of soil material from upper layers of soil to lower levels by downward percolation of water across soil horizons and accumulation of this material illuvial deposit in lower levels is called illuviation 1 2 In geology the removed material is irrelevant and the deposit eluvial deposit is the remaining material Eluviation occurs when precipitation exceeds evaporation A soil horizon formed due to eluviation is an eluvial zone or eluvial horizon In a typical soil profile the eluvial horizon refers to a light colored zone located depending on context and literature either at the lower part of the A horizon symbol Ae or within a distinct horizon E horizon below the A where the process is most intense and rapid Yet some sources consider the eluvial zone to be the A horizon plus the distinct E horizon as eluviation technically occurs in both The strict eluvial horizon E horizon is typically light gray clay depleted contains little organic matter and has a high concentration of silt and sand particles composed of quartz and other resistant minerals Eluvial ore deposits are those such as tungsten and gold placer deposits formed by settling and enriched by the winnowing or removal of lower density materials Diamonds within yellow ground weathered portions of kimberlites may be considered to be eluvial deposits Cassiterite and columbite tantalite deposits also occur as residual or eluvial concentrations The Pitinga tin deposit in Brazil an eluvial deposit is one of the largest tin mines in the world Weathering supergene enrichment of an apatite rich carbonatite in Ontario has produced a significant eluvial phosphate ore deposit See also editAlluvium Colluvium Diluvium LessivageReferences edit Glossary of Soil Science Terms Soil Science Society of America Archived from the original on 2006 09 27 Retrieved 2006 11 10 Glossary of Terms PhysicalGeography net Retrieved 2006 11 11 Gupta Chiranjib Kumar 2002 Chemical Metallurgy Principles and Practice Wiley ISBN 3 527 30376 6 Cronan David Spencer 1999 Handbook of Marine Mineral Deposits CRC Press ISBN 0 8493 8429 X Swiecki Rafal 2006 Eluvial Placers Accessed 18 April 2006 Van Hees Edmond H 2002 Supergene Phosphate Enrichment in Carbonatite Derived Eluvial Sediments Agrium Phosphate Mine Kapuskasing Ontario Canada The Geological Society of America GSA abstract Archived 2016 10 21 at the Wayback Machine Accessed 18 April 2006 Retrieved from https en wikipedia org w index php title Eluvium amp oldid 1212008374, wikipedia, wiki, book, books, library,
