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alteration zoning [1 record]

Record 1 2001-02-27

English

Subject field(s)
  • Metals Mining
  • Erosion and Weathering (Geol.)
  • Geochemistry
CONT

Alteration zoning. The phyllic and argillic alteration zones are usually absent so that the potassic zone is surrounded by the propylitic zone. This zonal pattern is present in both island arc and continental porphyry copper deposits.

French

Domaine(s)
  • Mines métalliques
  • Érosion et corrosion (Géologie)
  • Géochimie
CONT

Autour d'un même dépôt, on peut observer souvent une zonalité de l'altération, c'est-à-dire des «halos» successifs, de composition minéralogique et chimique différentes. Sous certaines conditions, [...] ces halos d'altération peuvent constituer d'excellents guides vers la minéralisation.

CONT

[...] la zonalité de l'altération est parfois déformée par les directions structurales des roches encaissantes.

Spanish

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