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Keranvoyer quarry, Plougoulm, Finistère, Brittany, Francei
Regional Level Types
Keranvoyer quarryQuarry (Backfilled)
Plougoulm- not defined -
FinistèreDepartment
BrittanyRegion
FranceCountry

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Name(s) in local language(s):Carrière de Keranvoyer
Latitude & Longitude (WGS84): 48° 39' 22'' North , 4° 1' 56'' West
Latitude & Longitude (decimal): 48.65616,-4.03224
GeoHash:G#: gbthu1xfd
Locality type:Quarry (Backfilled) - last checked 2018
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Plougoulm1,718 (2016)1.8km
Sibiril1,207 (2016)2.8km
Plouénan2,499 (2016)3.5km
Mespaul783 (2016)4.1km
Saint-Pol-de-Léon7,627 (2016)4.7km


An abandoned and filled-in quarry.
A skarn has been described with interesting mineralization.

Regions containing this locality

Eurasian PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


4 valid minerals.

Detailed Mineral List:

Grossular
Formula: Ca3Al2(SiO4)3
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, p. 210.
Scheelite
Formula: Ca(WO4)
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, p. 168.
Sillimanite
Formula: Al2(SiO4)O
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, p 210.
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, p. 254.

List of minerals arranged by Strunz 10th Edition classification

Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Grossular9.AD.25Ca3Al2(SiO4)3
Sillimanite9.AF.05Al2(SiO4)O
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10

List of minerals arranged by Dana 8th Edition classification

Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10

List of minerals for each chemical element

HHydrogen
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
BBoron
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
OOxygen
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
O GrossularCa3Al2(SiO4)3
O ScheeliteCa(WO4)
O SillimaniteAl2(SiO4)O
FFluorine
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
NaSodium
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MgMagnesium
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
AlAluminium
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Al GrossularCa3Al2(SiO4)3
Al SillimaniteAl2(SiO4)O
SiSilicon
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Si GrossularCa3Al2(SiO4)3
Si SillimaniteAl2(SiO4)O
CaCalcium
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Ca GrossularCa3Al2(SiO4)3
Ca ScheeliteCa(WO4)
FeIron
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
WTungsten
W ScheeliteCa(WO4)

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: 3147958
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]

Early Permian - Late Carboniferous
272.95 - 323.2 Ma



ID: 3188689
Paleozoic intrusive rocks

Age: Paleozoic (272.95 - 323.2 Ma)

Lithology: Intrusive igneous 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)
Chauris, L. (2014) Minéraux de Bretagne, Les Editions du Piat.


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