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Le Beix Mine, Saint-Germain-près-Herment, Herment, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

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Name(s) in local language(s):Mine du Beix ou du Betz
Latitude & Longitude (WGS84): 45° 42' 39'' North , 2° 35' 38'' East
Latitude & Longitude (decimal): 45.71083,2.59389
GeoHash:G#: u01u512uc
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate
Other/historical names associated with this locality:Auvergne; Rhône-Alpes


A large fluorite-quartz vein (250 m in long, 4 m in width) hosted by a migmatitic granite. This deposit was mined for fluorite from 1906 until 1977 by shafts and galleries. At the year of closure, it had been dug up to 244 m depth and 386 000 tons of ore had been produced. This mine has become very famous for its beautiful "electric-blue" fluorite crystals that developed in quartz vugs.
Located 2 km east of Lastic and around 6 km SSE of Herment.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

Baryte
Formula: BaSO4
Reference: BRGM (1981) - Fiche BSS 07161X4001/GT
Chalcopyrite
Formula: CuFeS2
Fluorite
Formula: CaF2
Habit: octaedrons (purple or green) and cubes (yellow or blue)
Colour: purple, green, yellow, blue
Description: Blue crystals (cubes up to 20 centimeters).
Reference: Bariand, P., 1986, "La Mine Du Beix", Monde et Minéraux, n. 75, pp. 16-17.
Galena
Formula: PbS
Reference: BRGM (1981) - Fiche BSS 07161X4001/GT
Pyrite
Formula: FeS2
Reference: BRGM (1981) - Fiche BSS 07161X4001/GT
Pyromorphite
Formula: Pb5(PO4)3Cl
Reference: BRGM (1981) - Fiche BSS 07161X4001/GT
Quartz
Formula: SiO2
Reference: Bariand, P., 1986, "Le Mine Du Beix", Monde et Minereaux, n. 75, pp. 16-17.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
'Galena'2.CD.10PbS
'Pyrite'2.EB.05aFeS2
Group 3 - Halides
'Fluorite'3.AB.25CaF2
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Baryte'7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
'Pyromorphite'8.BN.05Pb5(PO4)3Cl

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
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

List of minerals for each chemical element

OOxygen
O BaryteBaSO4
O PyromorphitePb5(PO4)3Cl
O QuartzSiO2
FFluorine
F FluoriteCaF2
SiSilicon
Si QuartzSiO2
PPhosphorus
P PyromorphitePb5(PO4)3Cl
SSulfur
S BaryteBaSO4
S ChalcopyriteCuFeS2
S GalenaPbS
S PyriteFeS2
ClChlorine
Cl PyromorphitePb5(PO4)3Cl
CaCalcium
Ca FluoriteCaF2
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
BaBarium
Ba BaryteBaSO4
PbLead
Pb GalenaPbS
Pb PyromorphitePb5(PO4)3Cl

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

Paleozoic - Neoproterozoic
251.902 - 1000 Ma



ID: 3153197
Lower Gneiss Unit (Massif Central)

Age: Neoproterozoic to Triassic (251.902 - 1000 Ma)

Description: high grade metamorphic

Lithology: Major:{migmatite/anatexite}, Minor{gneiss,amphibolite}

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]

Neoproterozoic
541 - 1000 Ma



ID: 3188037
Neoproterozoic crystalline metamorphic rocks

Age: Neoproterozoic (541 - 1000 Ma)

Comments: Massif Central

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


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