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Margabal Mine, Entraygues-sur-Truyère, Aveyron, Occitanie, Francei
Regional Level Types
Margabal MineMine
Entraygues-sur-Truyère- not defined -
AveyronDepartment
OccitanieRegion
FranceCountry

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Latitude & Longitude (WGS84):
44° North , 2° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~14km
Locality type:
Köppen climate type:
Other/historical names associated with this locality:
Midi-Pyrénées


Margabal is an historic mine, a tiny hole in the south-West of France which probably produces among the finest torbernites in the world!
The mine has been open for a very short time for Uranium ore, from 1957 to 1960.
It's really a small mine, about only 100m of extension.
During the summer of 1997, well after the blasting of the only entrance, some motivated collectors have managed to open a new entrance by digging a tunnel from the top of the mine, following a vein of smoky Quartz with a little bit of metatorbernite.
The same year of 1997, an exceptional piece, undoubtedly the most beautiful metatorbernite in the world, a stalactite of nearly 50cm long was found by J.Adani! This incredible specimen is now in the Museum of Natural History in Paris.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


6 valid minerals.

Detailed Mineral List:

Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Joan Rosell (SEM-EDS analyzed specimen).
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Reference: Joan Rosell (SEM-EDS analyzed specimen).
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Reference: Antonio Borrelli collection
Quartz
Formula: SiO2
Reference: Forms the matrix of many torbernite specimens (see photos)
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Forms the matrix of many torbernite specimens (see photos)
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Reference: Schwab, P-N. (1998): Mineralogical Record 29: 493-494
Uranocircite
Formula: Ba(UO2)2(PO4)2 · 10H2O
Reference: Le Règne Minéral, Hors Série IV, 1998

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Meta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
Metatorbernite8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Uranocircite8.EB.05Ba(UO2)2(PO4)2 · 10H2O

List of minerals arranged by Dana 8th Edition classification

Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Uranocircite40.2a.3.1Ba(UO2)2(PO4)2 · 10H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
var: Smoky Quartz-SiO2

List of minerals for each chemical element

HHydrogen
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H UranocirciteBa(UO2)2(PO4)2 · 10H2O
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H AutuniteCa(UO2)2(PO4)2 · 11H2O
OOxygen
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O UranocirciteBa(UO2)2(PO4)2 · 10H2O
O Quartz (var: Smoky Quartz)SiO2
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O QuartzSiO2
SiSilicon
Si Quartz (var: Smoky Quartz)SiO2
Si QuartzSiO2
PPhosphorus
P TorberniteCu(UO2)2(PO4)2 · 12H2O
P UranocirciteBa(UO2)2(PO4)2 · 10H2O
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
P AutuniteCa(UO2)2(PO4)2 · 11H2O
CaCalcium
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
CuCopper
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
BaBarium
Ba UranocirciteBa(UO2)2(PO4)2 · 10H2O
UUranium
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UranocirciteBa(UO2)2(PO4)2 · 10H2O
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
U AutuniteCa(UO2)2(PO4)2 · 11H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Schwab, P-N. (1998): French Torbernite.[Letters]. Mineralogical Record 29: 493-494


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