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GISEMENT PYROMETASOMATIQUE [1 record]

Record 1 2015-04-13

English

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

Closely allied to hypothermal deposits is the group known as pyrometasomatic. This group includes contact metamorphic deposits in limestone near the margins of granular intrusives, but the inclusive term, pyrometasomatic, recognizes the fact that the group is not restricted to the vicinity of contacts. Although carbonate rocks are the typical hosts, a few pyrometasomatic deposits occur in schists and gneisses which may or may not originally have contained alkaline earth carbonates.

CONT

The principal materials produced from pyrometasomatic deposits are: iron, copper, tungsten, graphite, zinc, lead, molybdenum, tin and uranium.

CONT

Pyrometasomatic deposits formed by replacement of wall rocks adjacent to an intrusion.

French

Domaine(s)
  • Mines métalliques
  • Géologie économique
CONT

À l'état naissant on peut observer parfois des cristaux métalliques avec un peu de gangue pneumatolytique dans de petites taches miarolitiques du granite [...]. La métasomatose des roches favorables de l'auréole produit souvent des skarns métallifères, qui constituent éventuellement des gisements de minerai très importants dits gisements pyrométasomatiques.

Spanish

Campo(s) temático(s)
  • Minas metálicas
  • Geología económica
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