Uranium Deposit Report
Deposit : |
Cerilly (District ) |
Country : |
France |
General Information |
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Geological District |
Cerilly | ||
Geological Region |
Massif Central | ||
Political/Geographical Province |
Auvergne (Allier) | ||
Last Data Update |
2009-01-01 | ||
Owner(s) |
100%, COGEMA | ||
Operator |
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Synonym Name(s) |
Lombre | ||
Technical Information |
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Tonnage Range (t U)
|
1,000 - 2,500 | ||
Grade Range (% U)
|
0.03 - 0.05 | ||
Deposit Status
|
Depleted | ||
Current Processing Plant
|
Bessines (Dismantled) | ||
Cumulative Production (t U)
|
285 | ||
Production Period
|
1978-1981 | ||
Produced Grade (% U)
|
0 | ||
General Remarks |
Two main deposits (Lombre and L'Ainesse) and 10 smaller one are present in the Cérilly district with geological ressources around 3500 t at grades of 0.01 to 0.05%., | ||
Geological Information |
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Deposit Type |
Sandstone - Tabular | ||
Geological Setting |
The two main deposits are located to the west part of the Stephano-permian Bourbon-l Archambault basin. Main characteristics of the deposits : - depth of 0 to 50m, - low grade (0.01 to 0.05%, maximum 0.11% for Lombre), - tonnages from a few tenth of tonnes to 900 t for Lombre, - mineralisation : coffinite, little pitchblende, some U-C products, - in relation with organic matter rich levels, - some deposit correspond to syn to diagenetic preconcentrations (Lower Autunian), some are epigenetic, with oxido-reduction fronts in Upper Autunian formations. | ||
Age of Mineralization |
Autunian for some of them, Oligocene for others | ||
Mineralization |
mineralisation : coffinite, little pitchblende, some U-C products, | ||
MetallogenicAspects |
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Age of Mineralization |
Autunian for some of them, Oligocene for others | ||
DepositShape |
tabular lenses | ||
DepositDimensions |
- lengh : 300 to 1000m, - width : 50 to 300m, - thickness : up to 11m | ||
GeologicalRemarks |
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Metallogenic Aspects |
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