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La Gardette Mine, Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, Francei
Regional Level Types
La Gardette MineMine
Bourg d'Oisans- not defined -
Isère- not defined -
Auvergne-Rhône-Alpes- not defined -
FranceCountry

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Name(s) in local language(s):Mine de la Gardette, Bourg d'Oisans, Isère, Rhône-Alpes, France
Latitude & Longitude (WGS84): 45° 2' 7'' North , 6° 1' 55'' East
Latitude & Longitude (decimal): 45.03528,6.03222
GeoHash:G#: u0h21q2t8
Locality type:Mine
Köppen climate type:Cfc : Subpolar oceanic climate
Other/historical names associated with this locality:Rhône-Alpes


This famous deposit is a narrow quartz-barite vein hosted in gneisses covered by liassic limestones. The mine started in the early 17th century for the "rock crystal" extraction, then for the gold operation from 1781 to 1788. During this short operation, the deposit became famous for its beautiful quartz crystals found in several large vugs. The mine will then be only operated for mineralogical specimens by many local prospectors until 2005 when all adits were finally closed...
Quartz twins with an angle of 84°30' were first described from this mine and are known as "La Gardette twins", but the name "Japan law twin" is more widely used, although it has no priority.

Regions containing this locality

The Alps, Europe

Mountain Range - 2,242 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


14 valid minerals.

Detailed Mineral List:

Aikinite
Formula: PbCuBiS3
Reference: "Les minéraux, leurs gisements, leurs associations", P. Bariand, F. Cesbron et J. Geffroy (1977), Editions Minéraux et Fossiles, BRGM
Anglesite
Formula: PbSO4
Reference: J. Geffroy, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 129-132."
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: J. Geffroy, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 129-132."
Baryte
Formula: BaSO4
Description: Very late phase in the paragenesis.
Reference: "Les minéraux, leurs gisements, leurs associations", P. Bariand, F. Cesbron et J. Geffroy (1977), Editions Minéraux et Fossiles, BRGM
Brannerite
Formula: (U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Reference: Le Règne Minéral, Hors Série IV (1998), p. 39
Cerussite
Formula: PbCO3
Reference: J. Geffroy, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 129-132."
Chalcopyrite
Formula: CuFeS2
Reference: Dana 7:I:222.
Galena
Formula: PbS
Reference: "Les minéraux, leurs gisements, leurs associations", P. Bariand, F. Cesbron et J. Geffroy (1977), Editions Minéraux et Fossiles, BRGM
Gold
Formula: Au
Description: Masses up to 300 grams and octahedra dendrites in galena.
Reference: "Les minéraux, leurs gisements, leurs associations", P. Bariand, F. Cesbron et J. Geffroy (1977), Editions Minéraux et Fossiles, BRGM
Malachite
Formula: Cu2(CO3)(OH)2
Reference: J. Geffroy, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 129-132."
Pyrite
Formula: FeS2
Reference: Alain TUEL Collection
Pyromorphite
Formula: Pb5(PO4)3Cl
Reference: J. Geffroy, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 129-132."
Quartz
Formula: SiO2
Habit: Slender crystals, Dauphiné habit common.
Colour: Colorless.
Description: Large groups of well-developed, slender, clear rock crystals of very good luster. Dauphiné habit common. La Gardette is the "type locality" of crystals with lamellar structure as described by Weil (1930,1931), and the "type locality" of Japan law twins, initially called "La Gardette twins" by Weiss (1829).
Reference: Weiss, C.S. (1829) Über die herzförmig genannten Zwillingskrystalle von Kalkspath, und gewisse analoge von Quarz. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin: 77-87. Weil, R. (1930) Nouvelles observations sur le quartz. Type L. Comptes rendus hebdomadaires des séances de l'Académie des sciences: 191: 380-382. R. Weil (1931) Quelques observations concernant la structure du quartz. Compte Rendu 1er Réunion de l'Institut d'Optique: 2-11. Poty, B. (1967) La croissance des cristaux de quartz dans le filons sur l'exemple du filon de La Gardette (Bourg d'Oisans) et des filons du massif du Mont-Blanc. Thesis. Minéralogie. Université de Nancy. Bariand, P., Cesbron, F., Geffroy, J. (1977) Les minéraux, leurs gisements, leurs associations. Editions Minéraux et Fossiles, BRGM.
Quartz var: Rock Crystal
Formula: SiO2
Reference: Martins da Pedra collection
Sphalerite
Formula: ZnS
Reference: J. Geffroy, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 129-132."
'Tennantite-Tetrahedrite Series'
Reference: J. Geffroy, Bull. Soc. Franç. Minér. Crist. , 1963, LXXXVI, pp. 129-132."

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Gold'1.AA.05Au
Group 2 - Sulphides and Sulfosalts
'Aikinite'2.HB.05aPbCuBiS3
'Chalcopyrite'2.CB.10aCuFeS2
'Galena'2.CD.10PbS
'Pyrite'2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
'Brannerite'4.DH.05(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
'Quartz'4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Azurite'5.BA.05Cu3(CO3)2(OH)2
'Cerussite'5.AB.15PbCO3
'Malachite'5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anglesite'7.AD.35PbSO4
'Baryte'7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
'Pyromorphite'8.BN.05Pb5(PO4)3Cl
Unclassified Minerals, Rocks, etc.
Tennantite-Tetrahedrite Series-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 3
Aikinite3.4.5.1PbCuBiS3
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
AB2O6
Brannerite8.3.4.1(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Cerussite14.1.3.4PbCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Baryte28.3.1.1BaSO4
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Pyromorphite41.8.4.1Pb5(PO4)3Cl
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
var: Rock Crystal-SiO2
'Tennantite-Tetrahedrite Series'-

List of minerals for each chemical element

HHydrogen
H AzuriteCu3(CO3)2(OH)2
H Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
H MalachiteCu2(CO3)(OH)2
CCarbon
C AzuriteCu3(CO3)2(OH)2
C CerussitePbCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O AnglesitePbSO4
O AzuriteCu3(CO3)2(OH)2
O BaryteBaSO4
O Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
O CerussitePbCO3
O MalachiteCu2(CO3)(OH)2
O PyromorphitePb5(PO4)3Cl
O QuartzSiO2
O Quartz (var: Rock Crystal)SiO2
SiSilicon
Si QuartzSiO2
Si Quartz (var: Rock Crystal)SiO2
PPhosphorus
P PyromorphitePb5(PO4)3Cl
SSulfur
S AikinitePbCuBiS3
S AnglesitePbSO4
S BaryteBaSO4
S ChalcopyriteCuFeS2
S GalenaPbS
S PyriteFeS2
S SphaleriteZnS
ClChlorine
Cl PyromorphitePb5(PO4)3Cl
CaCalcium
Ca Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
TiTitanium
Ti Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
FeIron
Fe Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu AikinitePbCuBiS3
Cu AzuriteCu3(CO3)2(OH)2
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
NbNiobium
Nb Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
BaBarium
Ba BaryteBaSO4
AuGold
Au GoldAu
PbLead
Pb AikinitePbCuBiS3
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS
Pb PyromorphitePb5(PO4)3Cl
BiBismuth
Bi AikinitePbCuBiS3
ThThorium
Th Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
UUranium
U Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Early Jurassic
174.1 - 201.3 Ma



ID: 3140465
mostly detrital deposit

Age: Early Jurassic (174.1 - 201.3 Ma)

Lithology: Major:{sandstone}, Minor{siltstone,dolomite/dolostone,conglomerate}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Devonian
358.9 - 419.2 Ma



ID: 3192647
Paleozoic crystalline metamorphic rocks

Age: Devonian (358.9 - 419.2 Ma)

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dana 7: I: 222.
Poty, B. (1967) La croissance des cristaux de quartz dans les filons sur l'exemple du filon de La Gardette (Bourg d'Oisans) et des filons du massif du Mont-Blanc. Thesis. Minéralogie. Université de Nancy.


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