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Antsirabe I District, Vakinankaratra Region, Antananarivo Province, Madagascar

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Name(s) in local language(s):Kaominin' Antsirabe I (Tananan' Antsirabe), Faritra Vakinankaratra, Faritanin' Antananarivo, Madagasikara
Neighbouring regions:
Locality type:District


Antsirabe is the main city of the Vakinanakaratra region and it is situated 169 km south of Antananarivo- the capitol of Madagascar. Antsirabe is often refered to in mineralogical litterature as a locality for minerals. But in fact Antsirabe is not a locality but more a good market place for minerals coming from numerous localities in the Vakinankaratra region and from the whole island.
Minerals labelled "Antsirabe" has not been found here, but probably just bought here.
Antsirabe with its surroundings is politically divided in 2 districts: Antsirabe I wich covers the city and Antsirabe II, being the area in a large circle around the city.

NOTE:
The type material of fluor-liddicoatite was found in soils somewhere near Antsirabe. The exact locality is not known. Please confer the Near Antsirabe entry.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

10 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Ungemach, M.H. (1916) Contribution à la Minéralogie de Madagascar. Bulletin de la Société française de minéralogie 39: 5-38
'Basanite'
Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Evansite
Formula: Al3(PO4)(OH)6 · 6H2O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
'Fayalite-Forsterite Series'
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Hastingsite
Formula: {Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
Marcasite
Formula: FeS2
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Mirabilite
Formula: Na2SO4 · 10H2O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Opal
Formula: SiO2 · nH2O
Opal var: Opal-AN
Formula: SiO2 · nH2O
Sanidine
Formula: K(AlSi3O8)
Thermonatrite
Formula: Na2CO3 · H2O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
'Trachyte'
Vivianite
Formula: Fe2+3(PO4)2 · 8H2O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Marcasite'2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
'Euxenite-(Y)'4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
'Opal'4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Group 5 - Nitrates and Carbonates
Thermonatrite5.CB.05Na2CO3 · H2O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Mirabilite'7.CD.10Na2SO4 · 10H2O
Group 8 - Phosphates, Arsenates and Vanadates
'Evansite'8.DF.10Al3(PO4)(OH)6 · 6H2O
Vivianite8.CE.40Fe2+3(PO4)2 · 8H2O
Group 9 - Silicates
'Augite'9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
'Hastingsite'9.DE.15{Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
Sanidine9.FA.30K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Basanite'-
'Fayalite-Forsterite Series'-
Trachyte-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
AB2O6
Euxenite-(Y)8.3.8.2(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Group 15 - HYDRATED NORMAL CARBONATES
A(XO3)·xH2O
Thermonatrite15.1.1.1Na2CO3 · H2O
Group 29 - HYDRATED ACID AND NORMAL SULFATES
A2XO4·xH2O
Mirabilite29.2.2.1Na2SO4 · 10H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
A3(XO4)2·xH2O
Vivianite40.3.6.1Fe2+3(PO4)2 · 8H2O
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A3(XO4)Zq·xH2O
Evansite42.1.2.1Al3(PO4)(OH)6 · 6H2O
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 H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Sanidine76.1.1.2K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Basanite'-
'Fayalite-Forsterite Series'-
Hastingsite-{Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
Opal
var: Opal-AN
-SiO2 · nH2O
'Trachyte'-

List of minerals for each chemical element

HHydrogen
H EvansiteAl3(PO4)(OH)6 · 6H2O
H Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
H MirabiliteNa2SO4 · 10H2O
H OpalSiO2 · nH2O
H Opal (var: Opal-AN)SiO2 · nH2O
H ThermonatriteNa2CO3 · H2O
H VivianiteFe32+(PO4)2 · 8H2O
CCarbon
C ThermonatriteNa2CO3 · H2O
OOxygen
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
O EvansiteAl3(PO4)(OH)6 · 6H2O
O Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
O MirabiliteNa2SO4 · 10H2O
O OpalSiO2 · nH2O
O Opal (var: Opal-AN)SiO2 · nH2O
O SanidineK(AlSi3O8)
O ThermonatriteNa2CO3 · H2O
O VivianiteFe32+(PO4)2 · 8H2O
NaSodium
Na Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Na MirabiliteNa2SO4 · 10H2O
Na ThermonatriteNa2CO3 · H2O
MgMagnesium
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Al EvansiteAl3(PO4)(OH)6 · 6H2O
Al Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Al SanidineK(AlSi3O8)
SiSilicon
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Si OpalSiO2 · nH2O
Si Opal (var: Opal-AN)SiO2 · nH2O
Si SanidineK(AlSi3O8)
PPhosphorus
P EvansiteAl3(PO4)(OH)6 · 6H2O
P VivianiteFe32+(PO4)2 · 8H2O
SSulfur
S MarcasiteFeS2
S MirabiliteNa2SO4 · 10H2O
KPotassium
K SanidineK(AlSi3O8)
CaCalcium
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ca Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
TiTitanium
Ti Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
FeIron
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Fe MarcasiteFeS2
Fe VivianiteFe32+(PO4)2 · 8H2O
YYttrium
Y Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
NbNiobium
Nb Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
CeCerium
Ce Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
TaTantalum
Ta Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ThThorium
Th Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
UUranium
U Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Ungemach, M.H. (1916) Contribution à la Minéralogie de Madagascar. Bulletin de la Société française de minéralogie 39: 5-38 ( with a note on augite from Antsirabe]
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871

Localities in this Region
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Madagascar

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