Chiva is a circular lagoon with a diameter of 900 m, located in the vicinity of the Catanda graben (Angola). This area is largely covered by Quaternary lacustrine sediments, however, a few dykes of carbonatitic composition have been found near the SE shore of the lagoon. The intrusion of these carbonatitic dykes has been linked to the occurrence of recent volcanic events in the Chiva area and interpreted as feeding channels of an eruptive centre with maar morphology.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

7 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

ⓘ Calcite-carbonatite

ⓘ Carbonatite

Detailed Mineral List:

ⓘ Baryte

Formula: BaSO₄

References:

Campeny, Marc, Melgarejo, Joan C., Mangas, José, Manuel, José, Gonçalves, Antonio O. (2017) Recent carbonatitic magmatism in Angola: the dykes of the Chiva lagoon maar. Boletín de la Sociedad Geológica Mexicana, 69 (1) 209-222 doi:10.18268/bsgm2017v69n1a10

ⓘ 'Britholite Group'

Formula: (REE,Ca)₅[(Si,P)O₄]₃X

References:

ⓘ Calcite

Formula: CaCO₃

References:

ⓘ 'Clay minerals'

References:

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

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ⓘ Kimzeyite

Formula: Ca₃Zr₂(SiO₄)(AlO₄)₂

References:

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

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ⓘ 'Olivine Group'

Formula: M₂SiO₄

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ⓘ Perovskite

Formula: CaTiO₃

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ⓘ 'Pyrochlore Group'

Formula: A₂Nb₂(O,OH)₆Z

References:

ⓘ Quartz

Formula: SiO₂

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ⓘ 'Serpentine Subgroup'

Formula: D₃[Si₂O₅](OH)₄

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ⓘ 'Smectite Group'

Formula: A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	'Pyrochlore Group'	4.00.	A₂Nb₂(O,OH)₆Z
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Perovskite	4.CC.30	CaTiO₃
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Baryte	7.AD.35	BaSO₄
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Kimzeyite	9.AD.25	Ca₃Zr₂(SiO₄)(AlO₄)₂
Unclassified
ⓘ	'Clay minerals'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Smectite Group'	-	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
ⓘ	'Serpentine Subgroup'	-	D₃[Si₂O₅](OH)₄
ⓘ	'Olivine Group'	-	M₂SiO₄
ⓘ	'Britholite Group'	-	(REE,Ca)₅[(Si,P)O₄]₃X

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
H	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
H	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Baryte	BaSO₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Kimzeyite	Ca₃Zr₂(SiO₄)(AlO₄)₂
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Perovskite	CaTiO₃
O	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
O	ⓘ Quartz	SiO₂
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
O	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
O	ⓘ Olivine Group	M₂SiO₄
O	ⓘ Britholite Group	(REE,Ca)₅[(Si,P)O₄]₃X
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Al	Aluminium
Al	ⓘ Kimzeyite	Ca₃Zr₂(SiO₄)(AlO₄)₂
Si	Silicon
Si	ⓘ Kimzeyite	Ca₃Zr₂(SiO₄)(AlO₄)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
Si	ⓘ Olivine Group	M₂SiO₄
Si	ⓘ Britholite Group	(REE,Ca)₅[(Si,P)O₄]₃X
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Britholite Group	(REE,Ca)₅[(Si,P)O₄]₃X
S	Sulfur
S	ⓘ Baryte	BaSO₄
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Kimzeyite	Ca₃Zr₂(SiO₄)(AlO₄)₂
Ca	ⓘ Perovskite	CaTiO₃
Ca	ⓘ Britholite Group	(REE,Ca)₅[(Si,P)O₄]₃X
Ti	Titanium
Ti	ⓘ Perovskite	CaTiO₃
Fe	Iron
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Zr	Zirconium
Zr	ⓘ Kimzeyite	Ca₃Zr₂(SiO₄)(AlO₄)₂
Nb	Niobium
Nb	ⓘ Pyrochlore Group	A₂Nb₂(O,OH)₆Z
Ba	Barium
Ba	ⓘ Baryte	BaSO₄

Other Regions, Features and Areas containing this locality

AfricaContinent

African PlateTectonic Plate

Congo Craton
- Angolan ShieldShield

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References

[1]Campeny, Marc, Melgarejo, Joan C., Mangas, José, Manuel, José, Gonçalves, Antonio O. (2017) Recent carbonatitic magmatism in Angola: the dykes of the Chiva lagoon maar. Boletín de la Sociedad Geológica Mexicana, 69 (1) 209-222 doi:10.18268/bsgm2017v69n1a10

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Mineral List

Rock Types Recorded

Select Rock List Type

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

Chiva lagoon maar, Catanda, Seles, Cuanza Sul Province, Angola i
Regional Level Types
Chiva lagoon maar Lagoon
Catanda - not defined -
Seles Municipality
Cuanza Sul Province Province
Angola Country