Uranium Deposit Report
Deposit : |
Chapelle-Largeau (La)-Bel Air |
Country : |
France |
General Information |
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Geological District |
Vendèe | ||
Geological Region |
Massif Armoricain | ||
Political/Geographical Province |
Pays de la Loire (Deux Sèvres) | ||
Last Data Update |
2009-01-01 | ||
Owner(s) |
CFM | ||
Operator |
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Technical Information |
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Tonnage Range (t U)
|
500 - 1,000 | ||
Grade Range (% U)
|
0.10 - 0.20 | ||
Deposit Status
|
Depleted | ||
Current Processing Plant
|
Ecarpiere (dismantled) | ||
Cumulative Production (t U)
|
665 | ||
Production Period
|
1953-1970 | ||
Produced Grade (% U)
|
0 | ||
General Remarks |
It was the first deposit discovered on the Vendée district in 1952. It produced 59 t at 0.079% from the open pit and 601 t at 0.102% from underground mining. | ||
Geological Information |
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Deposit Type |
Vein | ||
Geological Setting |
The deposit is located in the Mortagne leucogranitic batholith, along its northern border, 100m from the contact with metamorphic mafic rocks. Two joining vein systems are present, NW-SE parallel to the contact and NNW-SSE. In each system, most of the economic mineralisation was carried by two main veins (« filon Dedet and filon Ecole »). The veins are crosscut by late clay faults. | ||
Age of Mineralization |
Late Hercynian (Permian) for most of the french vein-type deposits in crystalline rocks (270-260 Ma) with some remobilisations during the alpine orogeny (70 Ma). | ||
Mineralization |
Veins (a few cm to 2m) are filled by massive and hard grey and red silica, brecciated several time. Pitchblende is the main mineralisation as hair-like veinlets within the siliceous breccia, wrapping the fragments. | ||
MetallogenicAspects |
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Age of Mineralization |
Late Hercynian (Permian) for most of the french vein-type deposits in crystalline rocks (270-260 Ma) with some remobilisations during the alpine orogeny (70 Ma). | ||
DepositShape |
Irregular to continuous veins within linear breccia zones | ||
DepositDimensions |
Lengh : 400m; depth : 170m; thickness : 0.2 to 3m | ||
GeologicalRemarks |
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Metallogenic Aspects |
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