Eluvium

Eluvium

In 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. 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. [cite web | title = Glossary of Soil Science Terms | publisher = Soil Science Society of America | url = http://www.soils.org/sssagloss/index.php | accessdate = 2006-11-10] [cite web| title = Glossary of Terms | url = http://www.physicalgeography.net/physgeoglos/e.html#eluviation | publisher = PhysicalGeography.net | accessdate = 2006-11-11] In geology, the removed material is irrelevant, and the deposit (eluvial deposit) is the remaining material.

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.

References

* 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) [http://www.minelinks.com/alluvial/deposits4.html "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) [http://gsa.confex.com/gsa/2002AM/finalprogram/abstract_45198.htm abstract.] Accessed 18 April 2006


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Eluvium — est le pseudonyme du musicien d Ambient Matthew Cooper, habitant actuellement à Portland. Il est né dans le Tennessee et a grandi à Louisville avant de déménager dans le Nord ouest, région connue pour sa fertilité en musique expérimentale de tout …   Wikipédia en Français

  • Eluvium — bezeichnet einen Begriff in der Bodenkunde; siehe Eluvialhorizont einen US amerikanischen Musiker; siehe Eluvium (Musiker) Diese Seite ist eine Begriffsklärung zur Unterscheidung mehrerer mit demselben Wort bezeichneter Begriffe …   Deutsch Wikipedia

  • Eluvĭum — (lat.), das auf seiner ursprünglichen Lagerstätte verbliebene Zersetzungsprodukt der Gesteine …   Meyers Großes Konversations-Lexikon

  • Eluvium — Eluvĭum (neulat.), im Gegensatz zu Alluvium die an ihrem Entstehungsort verbliebenen Reste der Erdrinde (Gebirgsschutt, Lehm, Laterit etc.) …   Kleines Konversations-Lexikon

  • eluvium — [ē lo͞o′vē əm, ilo͞o′vē əm] n. [ModL < L eluere (see ELUTRIATE), after L alluvium: see ALLUVIUM] an accumulation of dust and soil particles caused by the weathering and disintegration of rocks in place, or deposited by the wind: distinguished… …   English World dictionary

  • Eluvium — eliuvis statusas T sritis ekologija ir aplinkotyra apibrėžtis Nuosėdinė uoliena – purių masyvių uolienų dūlėjimo produktas (dūlas, esantis susidarymo vietoje). atitikmenys: angl. eluvial deposit; eluvium; residual deposit vok. Eluvialablagerung,… …   Ekologijos terminų aiškinamasis žodynas

  • eluvium — eliuvis statusas T sritis ekologija ir aplinkotyra apibrėžtis Nuosėdinė uoliena – purių masyvių uolienų dūlėjimo produktas (dūlas, esantis susidarymo vietoje). atitikmenys: angl. eluvial deposit; eluvium; residual deposit vok. Eluvialablagerung,… …   Ekologijos terminų aiškinamasis žodynas

  • Eluvium — Elu|vi|um 〈[ vi ] n.; s; unz.; Geol.〉 grobkörniger, am Bildungsort verbliebener Rückstand der Abtragungsvorgänge [zu lat. eluere „auswaschen“] * * * Eluvium   das, s, Geologie, Bodenkunde: noch am Entstehungsort befindlichen, meist durch… …   Universal-Lexikon

  • Eluvium — Elu|vi|um das; s <aus nlat. eluvium »das Ausgewaschene«; Analogiebildung zu ↑Alluvium> svw. ↑Eluvialhorizont …   Das große Fremdwörterbuch

  • Eluvium (musician) — Infobox musical artist Name = Eluvium Birth name = Matthew Cooper Born = Tennessee Origin = Portland, Oregon, Seattle, Washington Genre = Ambient Background = solo singer Label = Temporary Residence Limited| Years active = 2003–present URL =… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”