Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Ambohimasina, Betafo, Vakinankaratra, Madagascari
Regional Level Types
AmbohimasinaCommune
BetafoDistrict
VakinankaratraRegion
MadagascarCountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Name in Malagasy:Kaominin' Ambohimasina, Distrikan'i Betafo, Vakinankaratra, Madagasikara
Locality type:Commune


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 has been refered 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.

Regions containing this locality

Somali Plate (Somalia Plate)Plate

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:

Beryl
Formula: Be3Al2(Si6O18)
'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: A2-mD2X6-wZ1+w
Quartz
Formula: SiO2
Quartz var: Amethyst
Formula: SiO2
Quartz var: Pseudocubic Quartz
Formula: SiO2
Samarskite-(Y)
Formula: (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
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 4 - Oxides and Hydroxides
Euxenite-(Y)4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ilmenite4.CB.05Fe2+TiO3
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Pseudocubic Quartz4.DA.05SiO2
Samarskite-(Y)4.DB.25(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Group 8 - Phosphates, Arsenates and Vanadates
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Beryl9.CJ.05Be3Al2(Si6O18)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Fuchsite9.EC.15K(Al,Cr)3Si3O10(OH)2
Thorite9.AD.30Th(SiO4)
var: Orangite9.AD.30Th(SiO4)
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Columbite-Tantalite'-
'Fergusonite'-
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
'var: Betafite (of Hogarth 1977)'-A2-mD2X6-wZ1+w

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Samarskite-(Y)8.1.11.1(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
A2B2O6(O,OH,F)
'Pyrochlore Supergroup
var: Betafite (of Hogarth 1977)'
8.2.3.1A2-mD2X6-wZ1+w
AB2O6
Euxenite-(Y)8.3.8.2(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
Zircon51.5.2.1Zr(SiO4)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Vermiculite71.2.2d.3Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Columbite-Tantalite'-
'Fergusonite'-
Muscovite
var: Fuchsite
-K(Al,Cr)3Si3O10(OH)2
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
Quartz
var: Amethyst
-SiO2
var: Pseudocubic Quartz-SiO2
Thorite
var: Orangite
-Th(SiO4)
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
OOxygen
O Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
O Thorite (var: Orangite)Th(SiO4)
O ZirconZr(SiO4)
O BerylBe3Al2(Si6O18)
O Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
O Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
O IlmeniteFe2+TiO3
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O Xenotime-(Y)Y(PO4)
O Quartz (var: Amethyst)SiO2
O Quartz (var: Pseudocubic Quartz)SiO2
O ThoriteTh(SiO4)
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
MgMagnesium
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
AlAluminium
Al BerylBe3Al2(Si6O18)
Al Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Thorite (var: Orangite)Th(SiO4)
Si ZirconZr(SiO4)
Si BerylBe3Al2(Si6O18)
Si Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Pseudocubic Quartz)SiO2
Si ThoriteTh(SiO4)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
PPhosphorus
P Xenotime-(Y)Y(PO4)
KPotassium
K Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ca Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
TiTitanium
Ti Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ti IlmeniteFe2+TiO3
CrChromium
Cr Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
FeIron
Fe Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Fe IlmeniteFe2+TiO3
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
YYttrium
Y Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Y Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Y Xenotime-(Y)Y(PO4)
ZrZirconium
Zr ZirconZr(SiO4)
NbNiobium
Nb Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
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 Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ta Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ThThorium
Th Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Th Thorite (var: Orangite)Th(SiO4)
Th Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Th ThoriteTh(SiO4)
UUranium
U Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
U Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Behier, J. (1963) Carte minéralogique de Madagascar. Archive Service Géologique Madagascar. A 1871.
Besairie, H. (1966) Les Gîtes Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive, 34, 92p.

Localities in this Region
Show map


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.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: March 23, 2019 00:48:29 Page generated: December 28, 2018 14:29:17
Go to top of page