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Guersaliou, Saint-Jean-du-Doigt, Finistère, Brittany, Francei
Regional Level Types
Guersaliou- not defined -
Saint-Jean-du-Doigt- not defined -
FinistèreDepartment
BrittanyRegion
FranceCountry

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Latitude & Longitude (WGS84): 48° 39' 14'' North , 3° 47' 0'' West
Latitude & Longitude (decimal): 48.65411,-3.78354
GeoHash:G#: gbtkcchyt
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Plouezoc'h1,596 (2018)3.4km
Lanmeur2,195 (2016)5.0km
Plougasnou3,575 (2016)5.2km
Saint-Jean-du-Doigt673 (2016)5.2km
Guimaëc898 (2016)5.7km


Quartz and tourmalinite veins, associated with a microgranite vein in granite.

Located 1.6 kilometers South-West of Kerprigent castle.

Regions containing this locality

Eurasian PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

Arsenopyrite
Formula: FeAsS
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Bismuthinite
Formula: Bi2S3
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 65.
Cassiterite
Formula: SnO2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Chalcocite
Formula: Cu2S
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 62.
Chalcopyrite
Formula: CuFeS2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Copper
Formula: Cu
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 38.
Covellite
Formula: CuS
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 62.
Cuprite
Formula: Cu2O
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 139-140.
Molybdenite
Formula: MoS2
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 68.
Pharmacosiderite
Formula: KFe3+4(AsO4)3(OH)4 · 6-7H2O
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 172.
Pyrite
Formula: FeS2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Quartz
Formula: SiO2
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Scheelite
Formula: Ca(WO4)
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 168.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: R.PIERROT, L. CHAURIS, C. LAFORET (1973) : "Inventaire minéralogique de la France : 29- Finistère.", B.R.G.M. Paris.
Sphalerite
Formula: ZnS
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 52.
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 264.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bismuthinite2.DB.05Bi2S3
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Cuprite4.AA.10Cu2O
Quartz4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Scheelite7.GA.05Ca(WO4)
Group 8 - Phosphates, Arsenates and Vanadates
Pharmacosiderite8.DK.10KFe3+4(AsO4)3(OH)4 · 6-7H2O
Group 9 - Silicates
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified Minerals, Rocks, etc.
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
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
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
AX2
Cassiterite4.4.1.5SnO2
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)3Zq·xH2O
Pharmacosiderite42.8.1a.1KFe3+4(AsO4)3(OH)4 · 6-7H2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O QuartzSiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O CassiteriteSnO2
O CupriteCu2O
O ScheeliteCa(WO4)
O PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Si QuartzSiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
SSulfur
S ArsenopyriteFeAsS
S ChalcopyriteCuFeS2
S PyriteFeS2
S SphaleriteZnS
S BismuthiniteBi2S3
S CovelliteCuS
S ChalcociteCu2S
S MolybdeniteMoS2
KPotassium
K PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
CaCalcium
Ca ScheeliteCa(WO4)
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe ArsenopyriteFeAsS
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
CuCopper
Cu ChalcopyriteCuFeS2
Cu CopperCu
Cu CupriteCu2O
Cu CovelliteCuS
Cu ChalcociteCu2S
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
As PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
MoMolybdenum
Mo MolybdeniteMoS2
SnTin
Sn CassiteriteSnO2
WTungsten
W ScheeliteCa(WO4)
BiBismuth
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

Early Carboniferous
323.2 - 358.9 Ma



ID: 3144115
calc-alkaline mafic plutonism

Age: Mississippian (323.2 - 358.9 Ma)

Lithology: Major:{tonalite}, Minor{gabbro group,diorite}

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 - 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]

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


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