TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

FENITE ALTERATION [1 record]

Record 1 2004-03-09

English

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

As generally used today, widespread alkali metasomatism of quartzo-feldspathic country rocks in the environs of carbonatite complexes.

CONT

... fenitization ... is associated with carbonatite hosted deposits and ... is characterized by the development of nepheline, aegirine, sodic amphiboles and alkali feldspars in the aureoles of the carbonatite masses ...

CONT

Vanadium deposits mined in the western U.S.A. seem to be the result of fenitization of country rocks at the contact of carbonatite complexes which have been further modified and enriched by subsequent weathering.

PHR

Fenite alteration halo.

French

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

Transformation hydrothermale d'une roche avec transports de matière aboutissant à la formation de fénite.

CONT

Exceptionnelles, [les carbonatites] se présentent en petits gisements intrusifs ou filoniens [...] En bordure de ces intrusions, on note un métamorphisme de contact particulier : formation de fénites (ou fénitisation), roches acquérant une composition de syénite alcaline.

CONT

La fénitisation, qui débute parfois par une bréchification, donne naissance à des roches feldspathiques.

PHR

Auréole de fénitisation.

Spanish

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