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- Q2449835 subject Q6984762.
- Q2449835 subject Q7034677.
- Q2449835 subject Q8759368.
- Q2449835 abstract "Template:ForIn geology, eluvium or eluvial deposits are those 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 precipitation of water across soil horizons, and accumulation of this material (illuvial deposit) in lower levels is called illuviation. 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.".
- Q2449835 wikiPageExternalLink abstract_45198.htm.
- Q2449835 wikiPageExternalLink deposits4.html.
- Q2449835 wikiPageWikiLink Q102798.
- Q2449835 wikiPageWikiLink Q1069.
- Q2449835 wikiPageWikiLink Q1152275.
- Q2449835 wikiPageWikiLink Q155.
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- Q2449835 wikiPageWikiLink Q178397.
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- Q2449835 wikiPageWikiLink Q1904.
- Q2449835 wikiPageWikiLink Q191222.
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- Q2449835 wikiPageWikiLink Q1978830.
- Q2449835 wikiPageWikiLink Q204376.
- Q2449835 wikiPageWikiLink Q2141583.
- Q2449835 wikiPageWikiLink Q2586696.
- Q2449835 wikiPageWikiLink Q270699.
- Q2449835 wikiPageWikiLink Q34679.
- Q2449835 wikiPageWikiLink Q36133.
- Q2449835 wikiPageWikiLink Q43010.
- Q2449835 wikiPageWikiLink Q518713.
- Q2449835 wikiPageWikiLink Q5283.
- Q2449835 wikiPageWikiLink Q606812.
- Q2449835 wikiPageWikiLink Q6185405.
- Q2449835 wikiPageWikiLink Q6984762.
- Q2449835 wikiPageWikiLink Q7034677.
- Q2449835 wikiPageWikiLink Q743.
- Q2449835 wikiPageWikiLink Q7643391.
- Q2449835 wikiPageWikiLink Q7946.
- Q2449835 wikiPageWikiLink Q8759368.
- Q2449835 wikiPageWikiLink Q878214.
- Q2449835 wikiPageWikiLink Q897.
- Q2449835 wikiPageWikiLink Q9161265.
- Q2449835 comment "Template:ForIn geology, eluvium or eluvial deposits are those 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.".
- Q2449835 label "Eluvium".