skarn


skarn
In geology, a metamorphic zone developed in the contact area around igneous rock intrusions when carbonate sedimentary rocks are invaded by and replaced with chemical elements that originate from the igneous rock mass nearby.

Many skarns also include ore minerals; productive deposits of copper or other base metals have been found in and adjacent to skarns. The typical rock of a skarn is hornfels, a fine-grained, flinty rock produced by the heat and solutions given off by the intruding magma.

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      in geology, metamorphic zone developed in the contact area around igneous rock intrusions when carbonate sedimentary rocks are invaded by large amounts of silicon, aluminum, iron, and magnesium. The minerals commonly present in a skarn include iron oxides, calc-silicates (wollastonite, diopside, forsterite), andradite and grossularite garnet, epidote, and calcite. Many skarns also include ore minerals; several productive deposits of copper or other base metals have been found in and adjacent to skarns. Granitic and dioritic magmas are most commonly associated with skarns. Skarns can be zoned, with the inner zones successively replacing the outer ones as the wave of metamorphism moves through the surrounding rocks.

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Universalium. 2010.

Look at other dictionaries:

  • Skarn — is a metamorphic rock that is usually variably colored green or red, occasionally grey, black, brown or white. It usually forms by chemical metasomatism of rocks during metamorphism and in the contact zone of magmatic intrusions like granites… …   Wikipedia

  • skarn — s. n. Trimis de siveco, 09.07.2005. Sursa: Dicţionar ortografic  skarn s.n. Rocă de contact din silicaţi bine cristalizaţi. (< germ. Skarn) Trimis de claudia, 13.09.2007. Sursa: MDN  SKARN s.n. (geol.) Rocă de contact alcătuită din silicaţi… …   Dicționar Român

  • Skarn — der; s, e <aus gleichbed. schwed. skarn, eigtl. »Schmutz«> durch ↑Kontaktmetamorphose entstandene Lagerstätte mit Eisen u. Edelmetallen (Geol.) …   Das große Fremdwörterbuch

  • skarn — ˈskärn, kȧn noun ( s) Etymology: Swedish, literally, filth; akin to Old Norse skarn dirt, dung more at scat : contact metamorphic rock rich in iron …   Useful english dictionary

  • skarn — ● skarn nom masculin Roche résultant d échanges métasomatiques entre deux milieux de composition chimique très différente (généralement granite et roche carbonatée) au cours du métamorphisme de contact …   Encyclopédie Universelle

  • skarn — skȁrn m <N mn ovi> DEFINICIJA min. smjesa silikatnih minerala i nekih ruda, nastala pri dodiru magme s vapnencem ETIMOLOGIJA šved …   Hrvatski jezični portal

  • skarn — I skarn 1. skarn sb., et (affald, snavs), i sms. skarn , fx skarnkasse II skarn 2. skarn sb., et, skarn, ene (person som opfører sig dårligt), i sms. skarns , fx skarnsunge …   Dansk ordbog

  • Skarn — Dünnschliff eines Skarns unter dem Mikroskop Als Skarn wird eine Gruppe überaus heterogener Metamorphite (Umwandlungsgesteine) bezeichnet, welche durch Reaktionen saurer Magmen mit Karbonatgesteinen entstehen. Inhaltsverzeichnis …   Deutsch Wikipedia

  • skarn — I s ( et, skarn) ÅLD avskräde II s ( et, skarn) ÅLD silikt mineral i malmkropp III s ( et, skarn) ÅLD slinka …   Clue 9 Svensk Ordbok

  • Skarn — El skarn es un tipo de roca metamórfica y mineralización asociada generada por la interacción de carbonatos como la caliza o la dolomita con fluidos hidromagmáticos o cuerpos igneos a través de metamorfismo de contacto. Algunos skarns albergan… …   Wikipedia Español