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Riou Pezzouliou alluvials, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, Francei
Regional Level Types
Riou Pezzouliou 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 Pezzouliou, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne, France
Latitude & Longitude (WGS84): 45° 2' 32'' North , 3° 51' 37'' East
Latitude & Longitude (decimal): 45.04250,3.86028
GeoHash:G#: u048pzdzw
Locality type:Alluvials
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Espaly-Saint-Marcel3,971 (2016)0.7km
Vals-près-le-Puy3,758 (2016)1.8km
Le Puy-en-Velay22,718 (2016)2.0km
Ceyssac434 (2016)2.0km
Polignac2,761 (2016)3.2km
Other/historical names associated with this locality:Auvergne; Rhône-Alpes


The Riou Pezzouliou is a small brook which runs on the right side of the La Borne river. Well known since the Middle-Age for alluvial gem-quality sapphires and zircons. The source of the gems has not been clearly traced, but they are probably linked to magmatic enclaves in the neighbouring basaltic units.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


12 valid minerals.

Detailed Mineral List:

Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Périnet F (1995) Les microcristaux du Riou Pezzouliou (Hte Loire), Le Cahier des Micromonteurs 1995-1: 7-21
Calcite
Formula: CaCO3
Reference: collected by François Périnet
Corundum
Formula: Al2O3
Reference: collected by François Périnet
Corundum var: Sapphire
Formula: Al2O3
Reference: 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.; Perinet, F. (1995) Les microcristaux du Riou Pezzouliou (Hte Loire). Le Cahier des Micromonteurs, 95(1), 7-21.
'Enstatite-Ferrosilite Series'
Reference: collected by François Périnet
'Fayalite-Forsterite Series'
Reference: collected by François Périnet
Forsterite
Formula: Mg2SiO4
Reference: Périnet F (1995) Les microcristaux du Riou Pezzouliou (Hte Loire), Le Cahier des Micromonteurs 1995-1: 7-21
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: 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.; Perinet, F. (1995) Les microcristaux du Riou Pezzouliou (Hte Loire). Le Cahier des Micromonteurs, 95(1), 7-21.
Gold
Formula: Au
Reference: Périchaud J.-J. (1986), Où trouver les minéraux d’Auvergne, II Cantal – Haute-Loire, Edit. L’Instant Durable
Hematite
Formula: Fe2O3
Reference: collected by François Périnet
'Hornblende'
Reference: Périnet F (1995) Les microcristaux du Riou Pezzouliou (Hte Loire), Le Cahier des Micromonteurs 1995-1: 7-21
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Périnet F (1995) Les microcristaux du Riou Pezzouliou (Hte Loire), Le Cahier des Micromonteurs 1995-1: 7-21
Quartz
Formula: SiO2
Reference: collected by François Périnet
Rutile
Formula: TiO2
Reference: Périnet F (1995) Les microcristaux du Riou Pezzouliou (Hte Loire), Le Cahier des Micromonteurs 1995-1: 7-21
Spinel
Formula: MgAl2O4
Reference: François Périnet Collection
Titanite
Formula: CaTi(SiO4)O
Reference: Périnet F (1995) Les microcristaux du Riou Pezzouliou (Hte Loire), Le Cahier des Micromonteurs 1995-1: 7-21
Zircon
Formula: Zr(SiO4)
Reference: 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.; Perinet, F. (1995) Les microcristaux du Riou Pezzouliou (Hte Loire). Le Cahier des Micromonteurs, 95(1), 7-21.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 4 - Oxides and Hydroxides
Corundum4.CB.05Al2O3
var: Sapphire4.CB.05Al2O3
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Spinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Forsterite9.AC.05Mg2SiO4
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Enstatite-Ferrosilite Series'-
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Hematite4.3.1.2Fe2O3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Spinel7.2.1.1MgAl2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
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 [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(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.
Corundum
var: Sapphire
-Al2O3
'Enstatite-Ferrosilite Series'-
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-

List of minerals for each chemical element

CCarbon
C CalciteCaCO3
OOxygen
O MagnetiteFe2+Fe23+O4
O ForsteriteMg2SiO4
O RutileTiO2
O TitaniteCaTi(SiO4)O
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Garnet GroupX3Z2(SiO4)3
O ZirconZr(SiO4)
O Corundum (var: Sapphire)Al2O3
O HematiteFe2O3
O QuartzSiO2
O CorundumAl2O3
O CalciteCaCO3
O SpinelMgAl2O4
MgMagnesium
Mg ForsteriteMg2SiO4
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg SpinelMgAl2O4
AlAluminium
Al Corundum (var: Sapphire)Al2O3
Al CorundumAl2O3
Al SpinelMgAl2O4
SiSilicon
Si ForsteriteMg2SiO4
Si TitaniteCaTi(SiO4)O
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Garnet GroupX3Z2(SiO4)3
Si ZirconZr(SiO4)
Si QuartzSiO2
CaCalcium
Ca TitaniteCaTi(SiO4)O
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca CalciteCaCO3
TiTitanium
Ti RutileTiO2
Ti TitaniteCaTi(SiO4)O
FeIron
Fe MagnetiteFe2+Fe23+O4
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe HematiteFe2O3
ZrZirconium
Zr ZirconZr(SiO4)
AuGold
Au GoldAu

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)
Lacroix, A. (1892) Minéralogie de la France, Tome I, p. 178-179, p. 249, p. 593; Tome II, p. 249; Tome III, p. 211-214, p. 242-245. Librairie Albert Blanchard.
Gonnard, F. (1910) Sur les gisements gemmifères du Velay et de la Basse Auvergne, leur distribution géographique dans ces deux régions et leurs rapports du point de vue des associations minérales qu'ils renferment. Bulletin de la Société Française de Minéralogie, 33, 152-161 [http://gallica.bnf.fr/ark:/12148/bpt6k109011c.image.langFR.f169.pagination]
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.
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.
Perinet, F. (1995) Les microcristaux du Riou Pezzouliou (Hte Loire). Le Cahier des Micromonteurs, 95(1), 7-21.
Giuliani, G., Fallick, A., Ohnenstetter, D., and Pegere, G. (2009) Oxygen isotopes composition of sapphires from the French Massif Central: implications for the origin of gem corundum in basaltic fields. Mineralium Deposita, 44, 221-231.
Giuliani, G., Lasnier, B., Ohnenstetter, D., Fallick, A.E., and Pegere, G. (2010) Les Gisements de corindons de France. Le Règne Minéral, 93, 5-23.
De Ascencao Guedes, R. (2010) Des histoires pour le saphir du Riou Pezzouliou. Le Règne Minéral, 93, 48-52.


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