Grey Autunian sediments near Permian basin north border.
Grey Autunian layers are in contact with Cambrian basement (overlain by Basal Autunian conglomerates) along a major EW fault.
Uranium (pitchblende + sulfides + sulfosalts) is heavily concentrated in grey Autunian and also in conglomerate (in association with bitumen).
A deep alteration occurs along tectonic accidents.
Located 3 km SSE of Lodève.
NOTE: Not to be confused with the "Mas d'Alary, Lodève" locality.
References:
- Eur. J. Mineral., 1993, 5, 873-877.
- Henriot, O. and Leydet, J.C. (1998). "Le gisement de Mas d'Alary Village." Le Cahier des Micromonteurs(2), 13-26.
Mineral List:38 entries listed. 37 valid minerals. 1 type locality (valid mineral).
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