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Ambin Gorges (Val d'Ambin Gorge), Bramans, Val-Cenis, Saint-Jean-de-Maurienne, Savoie, Auvergne-Rhône-Alpes, Francei
Regional Level Types
Ambin Gorges (Val d'Ambin Gorge)Gorge
BramansCommune (Former)
Val-CenisCommune
Saint-Jean-de-MaurienneArrondissement
SavoieDepartment
Auvergne-Rhône-AlpesRegion
FranceCountry

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Latitude & Longitude (WGS84):
45° 13' 22'' North , 6° 48' 9'' East
Latitude & Longitude (decimal):
45.22296,6.80256
GeoHash:
G#: u0hc6b96z
GRN:
N31E04
Type:
Gorge
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Bramans400 (2017)1.9km
Sollières-Sardières174 (2017)4.7km
Aussois686 (2016)4.8km
Termignon461 (2016)6.0km
Avrieux356 (2016)6.8km
Mindat Locality ID:
422000
Long-form identifier:
mindat:1:2:422000:1
GUID (UUID V4):
0
Other Languages:
French:
Gorges de l'Ambin (Gorge du Val d'Ambin), Bramans, Val-Cenis, Saint-Jean-de-Maurienne, Savoie, Auvergne-Rhône-Alpes, France


Gorges along the lower course of Ruisseau d'Ambin, including the spectacular gypsum-anhydrite cliff locally known as La Moutta.


The outcropping Triassic evaporitic rocks of the so-called Maurienne gypsum nappe (or "Nappe des Gypses" formation) consist of a sedimentary sequence of evaporites (mainly anhydrites), marine carbonates (dolomite), and clay layers (micaschists). Anhydrite rock is the most abundant rock of the sequence. Sedimentary bedding is underlined in white anhydrite by numerous pale gray layers that are commonly folded. Due to massive recrystallization, alpine foliations are most of the time invisible. Marine carbonates consist of centimeter to meter scale beds of grey dolomite. As these carbonate beds have been strongly folded and stretched by Alpine tectonics, they form various scale blocks more or less rounded and elongated within the main anhydrite layering, called "boudins". A secondary white dolomite, in which no sedimentary structures are visible, is frequently observed around marine carbonate blocks. Sedimentary clay layers have been transformed into micaschist rich in phengite by Alpine metamorphism.

Quartz crystals from the evaporitic sequence contain fluid inclusions (Barré et al., 2020).

Fissures in green schist boudins embedded in the Triassic evaporitic sequence host a Ti-REE mineralisation.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


16 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Allanite-(Ce)
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘ Anatase
Formula: TiO2
ⓘ Anhydrite
Formula: CaSO4
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Phengite
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
ⓘ Native Sulphur
Formula: S8
ⓘ Orpiment
Formula: As2S3
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Rutile
Formula: TiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
ⓘOrpiment2.FA.30As2S3
Group 4 - Oxides and Hydroxides
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
ⓘAnatase4.DD.05TiO2
Group 5 - Nitrates and Carbonates
ⓘDolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAnhydrite7.AD.30CaSO4
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘFluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘAllanite-(Ce)9.BG.05b(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Phengite9.EC.15KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘAlbite9.FA.35Na(AlSi3O8)

List of minerals for each chemical element

HHydrogen
Hⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CCarbon
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Oⓘ AnataseTiO2
Oⓘ AnhydriteCaSO4
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ DolomiteCaMg(CO3)2
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
FFluorine
Fⓘ FluorapatiteCa5(PO4)3F
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
MgMagnesium
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Siⓘ QuartzSiO2
PPhosphorus
Pⓘ FluorapatiteCa5(PO4)3F
SSulfur
Sⓘ AnhydriteCaSO4
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ OrpimentAs2S3
Sⓘ PyriteFeS2
Sⓘ Native SulphurS8
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
CaCalcium
Caⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Caⓘ AnhydriteCaSO4
Caⓘ DolomiteCaMg(CO3)2
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ GypsumCaSO4 · 2H2O
TiTitanium
Tiⓘ AnataseTiO2
Tiⓘ RutileTiO2
FeIron
Feⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ HematiteFe2O3
Feⓘ Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Feⓘ PyriteFeS2
AsArsenic
Asⓘ OrpimentAs2S3
CeCerium
Ceⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
  • AlpsAccretionary Complex
EuropeContinent
France

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

De Ascençao Guedes, R. (2005) Singularités minéralogiques,paléontologiques et historiques du Trias évaporitique pennique de Savoie. Le Règne Minéral, 61, 5-27
Barré, G., Strzerzynski, P., Michels, R., Guillot, S., Cartigny, P., Thomassot, E., Lorgeoux, C., Assayag, N., and Truche, L. (2020) Tectono-metamorphic evolution of an evaporitic décollement as recorded by mineral and fluid geochemistry: the "Nappe des Gypses" (Western Alps) case study. Lithos, 358-359, 105419.
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