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Uraninite from
Montbelleux Mine, Luitré, Fougères-Vitré, Ille-et-Vilaine, Brittany, France


Locality type:Mine
Classification
Species:Uraninite
Formula:UO2
Comments:Th-bearing uraninite (5%).
Disseminated in muscovitic albitic post-Cadomian ± greisenized highly-differenciated granite stock (-60, -95 and -130 levels).
Uraninite is linked with albitization.
Three types of occurrence are known :
- Automorph, rounded or xenomorph in pyrite
- With arsenopyrite, sphalerite and bismuth/bismuthinite
- Cemented by organic matter at the contact of pyrite (late)/phyllite (early)/molybdenite
- Rims brecciated zircons

(L. Chauris, C. Laforêt and J. Cotten, Bull. Minéral. , 1985, 108, pp. 955-958).
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Uraninite data
Locality Data:Click here to view Montbelleux Mine, Luitré, Fougères-Vitré, Ille-et-Vilaine, Brittany, France
Data Identifiers
Mindat Occurrence Record ID:201453
Long-form Identifier:1:3:201453:1
GUID (UUID V4):0
References
Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 60-66
 
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