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Ambohimasina, Betafo District, Vakinankaratra, Madagascari
Regional Level Types
AmbohimasinaCommune
Betafo DistrictDistrict
VakinankaratraRegion
MadagascarCountry

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PhotosMapsSearch
09916650017272257649868.jpg
Xenotime-(Y)

Ambohimasina, Betafo District, Vakinankaratra, Madagascar
02361030017272004082515.jpg
Fergusonite

Ambohimasina, Betafo District, Vakinankaratra, Madagascar
07154820017272257656689.jpg
Amethyst

Ambohimasina, Betafo District, Vakinankaratra, Madagascar
09916650017272257649868.jpg
Xenotime-(Y)

Ambohimasina, Betafo District, Vakinankaratra, Madagascar
02361030017272004082515.jpg
Fergusonite

Ambohimasina, Betafo District, Vakinankaratra, Madagascar
09551410017272084643222.jpg
Amethyst

Ambohimasina, Betafo District, Vakinankaratra, Madagascar
04750290017272257666425.jpg
Xenotime-(Y)

Ambohimasina, Betafo District, Vakinankaratra, Madagascar
02361030017272004082515.jpg
Fergusonite

Ambohimasina, Betafo District, Vakinankaratra, Madagascar


A number of pegmatites prospected for beryl and U-minerals are found in the Ambohimasina Commune in the south and in the Faratsiho Commune in the North along the border of the Vavavato granite massif some 40 km NW of the town Antsirabe in the main highland of Madagascar.

These pegmatites as a group have been referred to by Besaire (1966) as "La groupe d'Ambohimasina". Among these are the Ampangabe (the locality from which the now descredited "Ampangabeite", synonym of Samarskite-(Y) was described from), Sahamandrevo, Lohavalala and Ambatovoahangy pegmatites.

Nice amethyst among others are also known from this commune.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

12 valid minerals.

Rock Types Recorded

Note: 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:

ⓘ Beryl
Formula: Be3Al2(Si6O18)
ⓘ Bismuthinite
Formula: Bi2S3
Description: pseudomorphed to bismutite
ⓘ Columbite-(Fe)
Formula: Fe2+Nb2O6
ⓘ 'Columbite-Tantalite'
ⓘ Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ⓘ 'Fergusonite'
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
ⓘ 'Pyrochlore Supergroup'
Formula: A2-mD2X6-wZ1-n
ⓘ 'Pyrochlore Supergroup var. Betafite (of Hogarth 1977)'
Formula: (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Amethyst
Formula: SiO2
ⓘ Quartz var. Pseudocubic Quartz
Formula: SiO2
ⓘ Samarskite-(Y)
Formula: YFe3+Nb2O8
ⓘ Thorite
Formula: Th(SiO4)
ⓘ Thorite var. Orangite
Formula: Th(SiO4)
ⓘ Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
ⓘ Xenotime-(Y)
Formula: Y(PO4)
ⓘ Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘBismuthinite2.DB.05Bi2S3
Group 4 - Oxides and Hydroxides
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘQuartz
var. Amethyst		4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘvar. Pseudocubic Quartz4.DA.05SiO2
ⓘSamarskite-(Y)4.DB.25YFe3+Nb2O8
ⓘColumbite-(Fe)4.DB.35Fe2+Nb2O6
ⓘEuxenite-(Y)4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Group 8 - Phosphates, Arsenates and Vanadates
ⓘXenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
ⓘThorite
var. Orangite		9.AD.30Th(SiO4)
ⓘ9.AD.30Th(SiO4)
ⓘZircon9.AD.30Zr(SiO4)
ⓘBeryl9.CJ.05Be3Al2(Si6O18)
ⓘMuscovite
var. Fuchsite		9.EC.15K(Al,Cr)3Si3O10(OH)2
ⓘ9.EC.15KAl2(AlSi3O10)(OH)2
ⓘVermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Unclassified
ⓘ'Pyrochlore Supergroup
var. Betafite (of Hogarth 1977)'		-(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
ⓘ'Columbite-Tantalite'-
ⓘ'Fergusonite'-
ⓘ'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n

List of minerals for each chemical element

HHydrogen
Hⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Hⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
BeBeryllium
Beⓘ BerylBe3Al2(Si6O18)
OOxygen
Oⓘ Quartz var. AmethystSiO2
Oⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Oⓘ Columbite-(Fe)Fe2+Nb2O6
Oⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Oⓘ IlmeniteFe2+TiO3
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Thorite var. OrangiteTh(SiO4)
Oⓘ QuartzSiO2
Oⓘ Samarskite-(Y)YFe3+Nb2O8
Oⓘ ThoriteTh(SiO4)
Oⓘ VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Oⓘ Xenotime-(Y)Y(PO4)
Oⓘ ZirconZr(SiO4)
Oⓘ Quartz var. Pseudocubic QuartzSiO2
NaSodium
Naⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
MgMagnesium
Mgⓘ VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
AlAluminium
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
SiSilicon
Siⓘ Quartz var. AmethystSiO2
Siⓘ BerylBe3Al2(Si6O18)
Siⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Thorite var. OrangiteTh(SiO4)
Siⓘ QuartzSiO2
Siⓘ ThoriteTh(SiO4)
Siⓘ VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Siⓘ ZirconZr(SiO4)
Siⓘ Quartz var. Pseudocubic QuartzSiO2
PPhosphorus
Pⓘ Xenotime-(Y)Y(PO4)
SSulfur
Sⓘ BismuthiniteBi2S3
KPotassium
Kⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Caⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
TiTitanium
Tiⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Tiⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Tiⓘ IlmeniteFe2+TiO3
CrChromium
Crⓘ Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
FeIron
Feⓘ Columbite-(Fe)Fe2+Nb2O6
Feⓘ IlmeniteFe2+TiO3
Feⓘ Samarskite-(Y)YFe3+Nb2O8
Feⓘ VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
YYttrium
Yⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Yⓘ Samarskite-(Y)YFe3+Nb2O8
Yⓘ Xenotime-(Y)Y(PO4)
ZrZirconium
Zrⓘ ZirconZr(SiO4)
NbNiobium
Nbⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Nbⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Nbⓘ Columbite-(Fe)Fe2+Nb2O6
Nbⓘ Samarskite-(Y)YFe3+Nb2O8
CeCerium
Ceⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
TaTantalum
Taⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Taⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
BiBismuth
Biⓘ BismuthiniteBi2S3
ThThorium
Thⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Thⓘ Thorite var. OrangiteTh(SiO4)
Thⓘ ThoriteTh(SiO4)
UUranium
Uⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)(Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH)
Uⓘ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Databases

GeoNames ID:11926699

Localities in this Region

Madagascar

Other Regions, Features and Areas that Intersect

AfricaContinent
African Plate
Madagascar
Somali PlateTectonic Plate

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

Behier, Jean (1963) Carte minéralogique de Madagascar. Archive Service Géologique de Madagascar A.1871
Besaire, Henri (1966) Gîtes minéraux de Madagascar. Annales géologiques de Madagascar Vol. 34. République Malgache
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