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Ménez Goaillou pegmatite quarries, Coray, Finistère, Brittany, Francei
Regional Level Types
Ménez Goaillou pegmatite quarriesGroup of Quarries
Coray- not defined -
FinistèreDepartment
BrittanyRegion
FranceCountry

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Latitude & Longitude (WGS84): 48° 5' 40'' North , 3° 50' 52'' West
Latitude & Longitude (decimal): 48.09472,-3.84778
GeoHash:G#: gbt387qhh
Locality type:Group of Quarries
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Trégourez999 (2016)1.5km
Coray1,704 (2016)4.1km
Leuhan795 (2016)4.8km
Laz735 (2016)4.9km
Langolen725 (2016)5.7km


Aplitic granite cupola, with disseminated arsenopyrite, intruded in Brioverian schists.
Numerous mineralized quartz veins (pneumatolytic-hydrothermal quartz-beryl-molybdenite veins) with greisens cut the granite.

Presence of cleavable quartz.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


22 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

'Apatite'
Colour: blue
Description: Crystals up to 5 centimeters.
Reference: Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [pp. 18, 30.]
Arsenopyrite
Formula: FeAsS
Reference: Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [p. 30.]
Bertrandite
Formula: Be4(Si2O7)(OH)2
Description: Geodes with small (1-2mm) crystals replacing beryl in veins that are rich in micas.
Reference: Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [pp. 11, 30.]
Beryl
Formula: Be3Al2(Si6O18)
Colour: White, pale green.
Description: Radiating groups of crystals, up to 10 centimeters.
Reference: Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [pp. 11, 30.]; https://www.mindat.org/gallery.php?loc=49953&min=819
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Bismuth
Formula: Bi
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Bismuthinite
Formula: Bi2S3
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Cassiterite
Formula: SnO2
Chalcopyrite
Formula: CuFeS2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Covellite
Formula: CuS
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Galena
Formula: PbS
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Goethite
Formula: α-Fe3+O(OH)
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Graphite
Formula: C
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Mackinawite
Formula: (Fe,Ni)9S8
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Marcasite
Formula: FeS2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Molybdenite
Formula: MoS2
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [pp. 11, 20, 30.]; Martin, J. (1981) Les Minéraux du Morbihan. Monde & Minéraux, 41, 4-9.
Pyrite
Formula: FeS2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Pyrrhotite
Formula: Fe7S8
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Quartz
Formula: SiO2
Reference: Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [pp. 18, 20.]
Rutile
Formula: TiO2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Scorodite
Formula: Fe3+AsO4 · 2H2O
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 172.
Sphalerite
Formula: ZnS
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Sphalerite var: Marmatite
Formula: (Zn,Fe)S
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Tennantite
Formula: Cu6[Cu4(Fe,Zn)2]As4S13
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Bismuth1.CA.05Bi
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bismuthinite2.DB.05Bi2S3
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Galena2.CD.10PbS
Mackinawite2.CC.25(Fe,Ni)9S8
Marcasite2.EB.10aFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
var: Marmatite2.CB.05a(Zn,Fe)S
Tennantite2.GB.05Cu6[Cu4(Fe,Zn)2]As4S13
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 8 - Phosphates, Arsenates and Vanadates
Scorodite8.CD.10Fe3+AsO4 · 2H2O
Group 9 - Silicates
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Bismuth1.3.1.4Bi
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Mackinawite2.7.2.1(Fe,Ni)9S8
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Marcasite2.12.2.1FeS2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
Tennantite3.3.6.2Cu6[Cu4(Fe,Zn)2]As4S13
Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Scorodite40.4.1.3Fe3+AsO4 · 2H2O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Apatite'-
Beryl
var: Aquamarine
-Be3Al2Si6O18
Sphalerite
var: Marmatite
-(Zn,Fe)S

List of minerals for each chemical element

HHydrogen
H BertranditeBe4(Si2O7)(OH)2
H Goethiteα-Fe3+O(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H ScoroditeFe3+AsO4 · 2H2O
BeBeryllium
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be BertranditeBe4(Si2O7)(OH)2
Be BerylBe3Al2(Si6O18)
CCarbon
C GraphiteC
OOxygen
O Beryl (var: Aquamarine)Be3Al2Si6O18
O BertranditeBe4(Si2O7)(OH)2
O BerylBe3Al2(Si6O18)
O CassiteriteSnO2
O QuartzSiO2
O Goethiteα-Fe3+O(OH)
O RutileTiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O ScoroditeFe3+AsO4 · 2H2O
AlAluminium
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al BerylBe3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si BertranditeBe4(Si2O7)(OH)2
Si BerylBe3Al2(Si6O18)
Si QuartzSiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S ArsenopyriteFeAsS
S MolybdeniteMoS2
S BismuthiniteBi2S3
S Sphalerite (var: Marmatite)(Zn,Fe)S
S ChalcopyriteCuFeS2
S CovelliteCuS
S TennantiteCu6[Cu4(Fe,Zn)2]As4S13
S GalenaPbS
S Mackinawite(Fe,Ni)9S8
S MarcasiteFeS2
S PyriteFeS2
S PyrrhotiteFe7S8
S SphaleriteZnS
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
TiTitanium
Ti RutileTiO2
FeIron
Fe ArsenopyriteFeAsS
Fe Sphalerite (var: Marmatite)(Zn,Fe)S
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe Mackinawite(Fe,Ni)9S8
Fe MarcasiteFeS2
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe ScoroditeFe3+AsO4 · 2H2O
NiNickel
Ni Mackinawite(Fe,Ni)9S8
CuCopper
Cu ChalcopyriteCuFeS2
Cu CovelliteCuS
Cu TennantiteCu6[Cu4(Fe,Zn)2]As4S13
ZnZinc
Zn Sphalerite (var: Marmatite)(Zn,Fe)S
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
As TennantiteCu6[Cu4(Fe,Zn)2]As4S13
As ScoroditeFe3+AsO4 · 2H2O
MoMolybdenum
Mo MolybdeniteMoS2
SnTin
Sn CassiteriteSnO2
PbLead
Pb GalenaPbS
BiBismuth
Bi BismuthBi
Bi BismuthiniteBi2S3

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

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3184835
Paleozoic sedimentary rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Lithology: Sedimentary 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]

Neoproterozoic
541 - 1000 Ma



ID: 3140385
marine molasse

Age: Neoproterozoic (541 - 1000 Ma)

Description: low grade metamorphic

Lithology: Major:{phyllite}, Minor{quartzite,marble}

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]

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Chauris, L., Chantret, F., and Le Bail, F. (1959) Sur la présence de bertrandite au Menez Gouaillou en Coray (Finistère). 84° Congrès National des Sociétés savantes.
Chauris, L. and Le Bail, F. (1959) Le massif de granulite du Menez Gouaillou en Coray (Finistère). Bulletin de la Société Géologique et Minéralogique de Bretagne, 2(1).
Belot, Victor R. (1978) Guide des minéraux, coquillages et fossiles: où les trouver en France, comment les reconnaître et les collectionner (Guides Horay). Pierre Horay (Ed.), 224 pp.
Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [pp. 11, 18, 20, 30.]
Martin, J. (1981) Les Minéraux du Morbihan. Monde & Minéraux, 41, 4-9.


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