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EPISYENITE [1 record]

Record 1 2005-04-08

English

Subject field(s)
  • Petrography
CONT

Multiphase alteration including disseminated uranium mineralization in quartz-depleted granites (episyenites) of Fichtelgebirge (Northeastern Bavaria, Germany).

OBS

The host rocks of the Gunnar deposit are essentially "episyenitic" in the terminology used for the altered granitoid plutons in France ...

French

Domaine(s)
  • Pétrographie
DEF

Roche à composition de syénite alcaline acquise secondairement, et dérivant de roche dioritiques ou gabbroïques dans lesquelles les plagioclases ont été albitisés et les pyroxènes ouralitisés.

CONT

[...] les épisyénites de la province uranifère du Limousin, France, où l’élimination de la silice a réduit ou fait disparaître le quartz dans certains volumes d’ordre décamétrique au sein du granite [...]

CONT

Les roches hôtes du gisement de Gunnar sont essentiellement «épisyénitiques» selon la terminologie utilisée en France pour désigner les plutons granitiques altérés [...]

Spanish

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