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MINERALIZED SKARN [1 record]

Record 1 2010-12-14

English

Subject field(s)
  • Economic Geology
  • Metals Mining
CONT

Skarn deposits are abundant, variable, and economically important. They are a principal global source of tungsten, a major source of copper, and an important source of iron, molybdenum, zinc, and gold.

CONT

Almost 100% of Canadian tungsten production ... is derived from skarn deposits. Skarns are the second most important type of economic tungsten deposit after vein/stockwork deposits ...

OBS

Pyrometasomatic deposits ... have been termed hydrothermal metamorphic, igneous metamorphic, contact metamorphic, skarn and pyrometasomatic. The last term is gaining general acceptance ... because it neatly summarizes the origin of these deposits which are formed at high temperatures (pyro) with the addition and subtraction of material (metasomatic) ... They are developed ... at the contact of intrusive plutons and carbonate country rocks. The latter are converted to marbles, calc-silicate hornfelses and/or skarns by contact metamorphic effects.

OBS

skarn deposit: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Géologie économique
  • Mines métalliques
CONT

Les skarns minéralisés sont abondants, de caractère variable et économiquement importants. À l'échelle mondiale, ils constituent la principale source de tungstène, une source majeure de cuivre et une source importante de fer, de molybdène, de zinc et d'or.

CONT

Les gisements liés aux calcaires comprennent des gîtes skarnifères (magnétite et oligiste en amas à proximité de roches éruptives) exploités dans l'Ouest des États-Unis, l'île d'Elbe, la Suède centrale [...] et souvent prolongés par des gîtes de substitution à sidérose qui s'altère en hématite et limonite dans la partie superficielle [...]

CONT

Magma granitique [...] Minéralisation associée : gîtes pyrométasomatiques de type skarn, étain, scheelite.

OBS

gisement skarnifié : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Key term(s)
  • gîte skarnifié

Spanish

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