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ALTERATION SUPERGENE [1 record]

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Record 1 2004-07-13

English

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

There are two main divisions of wall rock alteration: hypogene and supergene. Hypogene alteration is caused by ascending hydrothermal solutions, and supergene alteration by descending meteoric water reacting with previously mineralized ground.

CONT

Supergene alteration of biotite and phlogopite leads to the development of economic concentrations of vermiculite ...

French

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

[...] l'altération supergène et les évents volcaniques ou thermaux ont redistribué et reconcentré l'uranium.

CONT

D'autres observations [...] ont porté sur le cuivre natif, que nous rencontrons dans un certain nombre de dépôts, sans qu'il soit nécessairement lié à l'altération supergène sur place.

CONT

L'altération supergène de la biotite et de la phlogopite mène à la production de concentrations rentables de vermiculite [...]

Spanish

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