Located 1 km SW of Ouguela, is a lensoid body composed predominantly of riebeckite-aegirine gneiss. At the SE end of it is a 250 m long body of nepheline- and sodalite-bearing gneiss, which is sandwiched between riebeckite-aegirine gneiss and the country rock schists (Teixeira & Assunção 1958).

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Aegirine

10 valid minerals.

Rock Types Recorded

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Alphabetical List Tree Diagram

ⓘ Gneiss

ⓘ 'Pegmatite'

ⓘ Schist

Detailed Mineral List:

ⓘ Aegirine

Formula: NaFe³⁺Si₂O₆

References:

Assunção, C.T. and Gonçalves, F. (1971) Contribuição para o conhecimento das rochas hiperalcalinas e alcalinas (gnaisses hastingsíticos) do Alto Alentejo (Portugal). Bolletim da Sociedade Geológica de Portuga, 17, 187-229.

Teixeira, C., & de Assunção, C. T. (1958). Sur la géologie et la pétrographie des gneiss à riebeckite et aegyrine et des syénites à néphéline et sodalite de Cevadais, prés d'Ouguela (Campo Maior), Portugal. Cominicações dos Serviços Geológicos de Portugal, 42, 31-56.

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

ⓘ 'Biotite'

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

References:

ⓘ Cancrinite

Formula: (Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O

References:

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

References:

ⓘ Riebeckite

Formula: ◻Na₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂

References:

Hlawatsch, C. (1906): Über den Amphibol von Cevadaes (Portugal). Festschrift Harry Rosenbusch, Stuttgart, 68-76 (in German).

ⓘ Sodalite

Formula: Na₄(Si₃Al₃)O₁₂Cl

References:

ⓘ Titanite

Formula: CaTi(SiO₄)O

References:

ⓘ Zircon

Formula: Zr(SiO₄)

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Aegirine	9.DA.25	NaFe³⁺Si₂O₆
ⓘ	Riebeckite	9.DE.25	◻Na₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Cancrinite	9.FB.05	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
ⓘ	Sodalite	9.FB.10	Na₄(Si₃Al₃)O₁₂Cl
Unclassified
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃

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	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Riebeckite	◻Na₂(Fe₃²⁺Fe₂³⁺)Si₈O₂₂(OH)₂
C	Carbon
C	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
O	Oxygen
O	ⓘ Aegirine	NaFe³⁺Si₂O₆
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Riebeckite	◻Na₂(Fe₃²⁺Fe₂³⁺)Si₈O₂₂(OH)₂
O	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Na	Sodium
Na	ⓘ Aegirine	NaFe³⁺Si₂O₆
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Riebeckite	◻Na₂(Fe₃²⁺Fe₂³⁺)Si₈O₂₂(OH)₂
Na	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Si	Silicon
Si	ⓘ Aegirine	NaFe³⁺Si₂O₆
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Riebeckite	◻Na₂(Fe₃²⁺Fe₂³⁺)Si₈O₂₂(OH)₂
Si	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
S	Sulfur
S	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Cl	Chlorine
Cl	ⓘ Sodalite	Na₄(Si₃Al₃)O₁₂Cl
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Ca	Calcium
Ca	ⓘ Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Ti	ⓘ Titanite	CaTi(SiO₄)O
Fe	Iron
Fe	ⓘ Aegirine	NaFe³⁺Si₂O₆
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Riebeckite	◻Na₂(Fe₃²⁺Fe₂³⁺)Si₈O₂₂(OH)₂
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

Ossa-Morena ZoneVolcanic Arc

EuropeContinent

Iberian PeninsulaPeninsula

Portugal

Portalegre
- Monforte
  - Alto Alentejo ComplexComplex

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References

Hlawatsch, C. (1906): Über den Amphibol von Cevadaes (Portugal). Festschrift Harry Rosenbusch, Stuttgart, 68-76 (in German).

Woolley, Alan R. (2019) Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands. The Geological Society of London. doi:10.1144/mpar4

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Cevadais occurrence, Campo Maior, Portalegre, PortugaliRegional Level TypesCevadais occurrenceOccurrence Campo MaiorMunicipality PortalegreDistrict PortugalCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

Rock Types Recorded

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Cevadais occurrence, Campo Maior, Portalegre, Portugal i
Regional Level Types
Cevadais occurrence Occurrence
Campo Maior Municipality
Portalegre District
Portugal Country