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Riou des Brus alluvials, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, Francei
Regional Level Types
Riou des Brus alluvialsAlluvials
Espaly-Saint-Marcel- not defined -
Le Puy-en-Velay- not defined -
Haute-LoireDepartment
Auvergne-Rhône-AlpesRegion
FranceCountry

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Name(s) in local language(s):Riou des Brus, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne, France
Latitude & Longitude (WGS84): 45° 2' 12'' North , 3° 51' 50'' East
Latitude & Longitude (decimal): 45.03667,3.86389
GeoHash:G#: u048pytte
Locality type:Alluvials
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Vals-près-le-Puy3,758 (2016)1.2km
Espaly-Saint-Marcel3,971 (2016)1.3km
Le Puy-en-Velay22,718 (2016)1.8km
Ceyssac434 (2016)2.3km
Polignac2,761 (2016)3.8km
Other/historical names associated with this locality:Auvergne; Rhône-Alpes


The Riou des Brus is a small stream which joined the Riou Pezzouliou. Like the Riou Pezzouliou, it is well known since the Middle-Age for alluvial gem-quality sapphires and zircons,

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Collected by François Périnet
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Collected by François Périnet
Calcite
Formula: CaCO3
Reference: Collected by François Périnet
'Chromite-Hercynite Series'
Reference: Collected by François Périnet
Corundum
Formula: Al2O3
Reference: Heavy sands collected by Charles Nicolas
Corundum var: Sapphire
Formula: Al2O3
Reference: Heavy sands collected by Charles Nicolas
'Fayalite-Forsterite Series'
Reference: Collected by François Périnet
Hydroxylapatite
Formula: Ca5(PO4)3(OH)
Description: Analyse Vincent Bourgoin - Association Jean Wyart
Reference: collected Charles Nicolas
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Collected by François Périnet
Magnetite var: Titaniferous Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Reference: Collected by François Périnet
Quartz
Formula: SiO2
Reference: Collected by François Périnet
Sillimanite
Formula: Al2(SiO4)O
Reference: Collected by François Périnet
Zircon
Formula: Zr(SiO4)
Reference: Heavy sands collected by Charles Nicolas

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Corundum4.CB.05Al2O3
var: Sapphire4.CB.05Al2O3
Magnetite4.BB.05Fe2+Fe3+2O4
var: Titaniferous Magnetite4.BB.05Fe2+(Fe3+,Ti)2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
Hydroxylapatite8.BN.05Ca5(PO4)3(OH)
Group 9 - Silicates
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Sillimanite9.AF.05Al2(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Chromite-Hercynite Series'-
'Fayalite-Forsterite Series'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Hydroxylapatite41.8.1.3Ca5(PO4)3(OH)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
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 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Chromite-Hercynite Series'-
Corundum
var: Sapphire
-Al2O3
'Fayalite-Forsterite Series'-
Magnetite
var: Titaniferous Magnetite
-Fe2+(Fe3+,Ti)2O4

List of minerals for each chemical element

HHydrogen
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H HydroxylapatiteCa5(PO4)3(OH)
CCarbon
C CalciteCaCO3
OOxygen
O CorundumAl2O3
O Corundum (var: Sapphire)Al2O3
O ZirconZr(SiO4)
O Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
O CalciteCaCO3
O MagnetiteFe2+Fe23+O4
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O SillimaniteAl2(SiO4)O
O QuartzSiO2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O HydroxylapatiteCa5(PO4)3(OH)
FFluorine
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MgMagnesium
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Al CorundumAl2O3
Al Corundum (var: Sapphire)Al2O3
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al SillimaniteAl2(SiO4)O
SiSilicon
Si ZirconZr(SiO4)
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si SillimaniteAl2(SiO4)O
Si QuartzSiO2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
PPhosphorus
P HydroxylapatiteCa5(PO4)3(OH)
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
CaCalcium
Ca CalciteCaCO3
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca HydroxylapatiteCa5(PO4)3(OH)
TiTitanium
Ti Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Fe Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
Fe MagnetiteFe2+Fe23+O4
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
ZrZirconium
Zr ZirconZr(SiO4)

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

Pliocene
2.588 - 5.333 Ma



ID: 3155968
hot spot

Age: Pliocene (2.588 - 5.333 Ma)

Lithology: Major:{alkali basalt}, Minor{hawaiite,nephelinic, leucitic and analcitic rocks}

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]

Late Paleozoic
251.902 - 358.9 Ma



ID: 3191665
Paleozoic intrusive rocks

Age: Phanerozoic (251.902 - 358.9 Ma)

Comments: Massif Central

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

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
FORESTIER F.H. (1993) - Histoire de l’un des gisements de gemmes le plus anciennement connu d’Europe occidentale : saphirs, grenats et hyacinthes du Puy-en-Velay (43). Le Riou Pezzouilloux commune d’Espaly-Saint-Marcel, Cahiers de la Haute-Loire.


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