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Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France i
Regional Level Types
Roc de Courlande Group of Outcrops
Chastreix Commune
Issoire Arrondissement
Puy-de-Dôme Department
Auvergne-Rhône-Alpes Region
France Country

Regional Level Types
Roc de Courlande	Group of Outcrops
Chastreix	Commune
Issoire	Arrondissement
Puy-de-Dôme	Department
Auvergne-Rhône-Alpes	Region
France	Country

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The Roc de Courlande in the background, with a mineralised outcrop

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Mineralised outcrop beside the road

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

The Roc de Courlande

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

The Roc de Courlande in the background, with a mineralised outcrop

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Mineralised outcrop beside the road

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

The Roc de Courlande

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

The Roc de Courlande in the background, with a mineralised outcrop

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Mineralised outcrop beside the road

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Latitude & Longitude (WGS84):

45° 31' 37'' North , 2° 46' 22'' East

Latitude & Longitude (decimal):

45.52716,2.77297

GRN:

N31E02

Type:

Group of Outcrops

Köppen climate type:

Cfb : Temperate oceanic climate

Nearest Settlements:

Place	Population	Distance
Mont-Dore	1,787 (2017)	5.6km
La Tour-d’Auvergne	810 (2016)	6.5km
Picherande	379 (2016)	7.0km
La Bourboule	2,162 (2016)	7.3km
Saint-Donat	296 (2016)	7.7km

Mindat Locality ID:

53115

Long-form identifier:

mindat:1:2:53115:0

GUID (UUID V4):

Other/historical names associated with this locality:

Auvergne; Rhône-Alpes

Other Languages:

French:

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Trachyandesite dome-flow, with numerous mafic enclaves, coming from Mont Redon. Good outcrops on the road to Chastreix-Sancy ski station, just below the Roc de Courlande.

Note on the mineral list: Titanite was erroneously reported following the beginning of this discussion: https://www.mindat.org/mesg-601214.html. Actually, the crystals photographed by Alex are titanite, but they couldn't have come from Roc de Courlande where titanite was never reported by dozens of micro-mineralogists who have collected here (Jean-Marc Johannet).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

12 valid minerals. 4 erroneous literature entries.

Rock Types Recorded

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Trachyandesite

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Etienne Médard collection

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃A

References:

Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

Description: crystals have been analysed and are actually fluorophlogopite

References:

Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

ⓘ Diopside

Formula: CaMgSi₂O₆

References:

Gourgaud A. (1985) Mélanges de magmas dans les séries alcalines et calco-alcalines : leur role dans la genèse des laves intermédiaires et leur influences sur les mécanismes éruptifs. PhD thesis, Clermont-Ferrand, 522 pp.

ⓘ ~~Edenite~~

Formula: NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂

Description: crystals have been analysed and are actually fluoro-edenite

References:

ⓘ Enstatite

Formula: Mg₂Si₂O₆

Description: other reference: Designolle J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

References:

ⓘ ~~Fayalite~~

Formula: Fe²⁺₂(SiO₄)

References:

Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

ⓘ Fluoro-edenite

Formula: NaCa₂Mg₅(Si₇Al)O₂₂F₂

References:

Médard, Paul, Designolle, Jean-Luc, Médard, Etienne, Devolle, Jean-Claude (2021) Minéralogie des enclaves basiques du stratovolcan du Sancy [Mineralogy of the basic enclaves of the Sancy stratovolcano]. Le Cahier des Micromonteurs 151(1), 3-27

ⓘ Fluorophlogopite

Formula: KMg₃(Si₃Al)O₁₀F₂

References:

ⓘ Hematite ?

Formula: Fe₂O₃

References:

JM Johannet collection.

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

Description: other reference: Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

References:

ⓘ ~~Phlogopite~~

Formula: KMg₃(AlSi₃O₁₀)(OH)₂

Description: crystals have been analysed and are actually fluorophlogopite

References:

ⓘ 'Pyroxene Group' ?

Formula: ADSi₂O₆

Description: This is either enstatite or diopside.

References:

Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

ⓘ Sanidine

Formula: K(AlSi₃O₈)

Description: other reference: Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

References:

ⓘ ~~Titanite~~

Formula: CaTi(SiO₄)O

Description: See discussion on https://www.mindat.org/mesg-601214.html "Erroneously reported as titanite was never found at Roc de Courlande. The sample illustrated by Alex should come from another place in Massif du Sancy like Le Capucin https://www.mindat.org/loc-123571.html Le Puy de la Tache https://www.mindat.org/loc-49421.html or Le Ravin des Chèvres https://www.mindat.org/loc-159540.html" (Jean-Marc Johannet)

References:

Collection of Alex Earl (see discussion on https://www.mindat.org/mesg-601214.html)

ⓘ Tridymite

Formula: SiO₂

References:

Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

ⓘ Zircon

Formula: Zr(SiO₄)

References:

Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

ⓘ Zirconolite

Formula: CaZrTi₂O₇

References:

Designolle, Jean-Luc (2021) Quelques nouveautés dans le massif du Sancy. Le Cahier des Micromonteurs 154(4), 14-21

Gallery:

CaTi(SiO₄)Oⓘ ~~Titanite~~

Titanite, etc.

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Titanite, etc.

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Titanite, etc.

Roc de Courlande, Chastreix, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Hematite ?	4.CB.05	Fe₂O₃
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Tridymite	4.DA.10	SiO₂
ⓘ	Zirconolite	4.DH.30	CaZrTi₂O₇
Group 9 - Silicates
ⓘ	Fayalite ?	9.AC.05	Fe²⁺₂(SiO₄)
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Titanite ?	9.AG.15	CaTi(SiO₄)O
ⓘ	Enstatite	9.DA.05	Mg₂Si₂O₆
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Edenite ?	9.DE.15	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
ⓘ	Fluoro-edenite	9.DE.15	NaCa₂Mg₅(Si₇Al)O₂₂F₂
ⓘ	Phlogopite ?	9.EC.20	KMg₃(AlSi₃O₁₀)(OH)₂
ⓘ	Fluorophlogopite	9.EC.20	KMg₃(Si₃Al)O₁₀F₂
ⓘ	Sanidine	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
Unclassified
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Pyroxene Group' ?	-	ADSi₂O₆
ⓘ	'Apatite'	-	Ca₅(PO₄)₃A

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Edenite	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
H	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Edenite	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
O	ⓘ Enstatite	Mg₂Si₂O₆
O	ⓘ Fayalite	Fe₂²⁺(SiO₄)
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	ⓘ Sanidine	K(AlSi₃O₈)
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Tridymite	SiO₂
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Zirconolite	CaZrTi₂O₇
O	ⓘ Fluoro-edenite	NaCa₂Mg₅(Si₇Al)O₂₂F₂
O	ⓘ Pyroxene Group	ADSi₂O₆
O	ⓘ Fluorophlogopite	KMg₃(Si₃Al)O₁₀F₂
O	ⓘ Apatite	Ca₅(PO₄)₃A
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Fluoro-edenite	NaCa₂Mg₅(Si₇Al)O₂₂F₂
F	ⓘ Fluorophlogopite	KMg₃(Si₃Al)O₁₀F₂
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Edenite	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
Na	ⓘ Fluoro-edenite	NaCa₂Mg₅(Si₇Al)O₂₂F₂
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Edenite	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
Mg	ⓘ Enstatite	Mg₂Si₂O₆
Mg	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Mg	ⓘ Fluoro-edenite	NaCa₂Mg₅(Si₇Al)O₂₂F₂
Mg	ⓘ Fluorophlogopite	KMg₃(Si₃Al)O₁₀F₂
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Edenite	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
Al	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	ⓘ Sanidine	K(AlSi₃O₈)
Al	ⓘ Fluoro-edenite	NaCa₂Mg₅(Si₇Al)O₂₂F₂
Al	ⓘ Fluorophlogopite	KMg₃(Si₃Al)O₁₀F₂
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Edenite	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
Si	ⓘ Enstatite	Mg₂Si₂O₆
Si	ⓘ Fayalite	Fe₂²⁺(SiO₄)
Si	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Si	ⓘ Sanidine	K(AlSi₃O₈)
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Tridymite	SiO₂
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Fluoro-edenite	NaCa₂Mg₅(Si₇Al)O₂₂F₂
Si	ⓘ Pyroxene Group	ADSi₂O₆
Si	ⓘ Fluorophlogopite	KMg₃(Si₃Al)O₁₀F₂
P	Phosphorus
P	ⓘ Apatite	Ca₅(PO₄)₃A
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
K	ⓘ Sanidine	K(AlSi₃O₈)
K	ⓘ Fluorophlogopite	KMg₃(Si₃Al)O₁₀F₂
Ca	Calcium
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Edenite	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Zirconolite	CaZrTi₂O₇
Ca	ⓘ Fluoro-edenite	NaCa₂Mg₅(Si₇Al)O₂₂F₂
Ca	ⓘ Apatite	Ca₅(PO₄)₃A
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Ti	ⓘ Titanite	CaTi(SiO₄)O
Ti	ⓘ Zirconolite	CaZrTi₂O₇
Fe	Iron
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Fayalite	Fe₂²⁺(SiO₄)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Zr	ⓘ Zirconolite	CaZrTi₂O₇

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

Moldanubian BeltOrogenic Belt

EuropeContinent

France

Auvergne-Rhône-Alpes
- Volcanos of Auvergne Regional Natural ParkProtected Area
⭔AuvergneRegion
Massif CentralHighland Region

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

fr.wikiloc.com (n.d.) https://fr.wikiloc.com/itineraires-randonnee/le-roc-de-courlande-39322770/photo-25474796

Designolle, J.L. (1996). Massif du Sancy (Puy de Dôme). Le Cahier des Micromonteurs, (4), 8-9.

fr.wikipedia.org (n.d.) https://fr.wikipedia.org/wiki/Fichier:Roc_de_Courlande.JPG

Designolle, J.-L. (2020) Les zircons du massif de Sancy. Le Cahier des Micromonteurs:149(3): 11-38.

Designolle, Jean-Luc (2021) Quelques nouveautés dans le massif du Sancy. Le Cahier des Micromonteurs 154(4), 14-21

Fermis, A. (2023) Compte rendu des sorties AFM en Auvergne. Le Cahier des Micromonteurs 162(4), 32-37

commons.wikimedia.org (n.d.) https://commons.wikimedia.org/wiki/File:Roc_de_Courlande.jpg

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