Eluviumoreluvial deposits are those geological deposits and soils that are derived by in situ weathering or weathering plus gravitational movement or accumulation. Eluvial ore deposits are those such as tungsten and gold placers formed by settling and enriched by the winnowing or removal of lower density materials. Diamonds within the yellow ground or weathered portions of kimberlites may be considered as 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 carbonatiteinOntario has produced a significant eluvial phosphate ore deposit.
![]() | This geology article is a stub. You can help Wikipedia by expanding it. |