Ambatofotsy pegmatite, Mahavelona, Soavinandriana District, Itasy, Madagascari
Regional Level Types | |
---|---|
Ambatofotsy pegmatite | Pegmatite |
Mahavelona | Commune |
Soavinandriana District | District |
Itasy | Region |
Madagascar | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
19° 10' South , 46° 35' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Soavinandriana | 40,453 (2018) | 15.7km |
Miandrarivo | 27,000 (2018) | 34.4km |
Faratsiho | 37,563 (2018) | 46.4km |
Mindat Locality ID:
23574
Long-form identifier:
mindat:1:2:23574:2
GUID (UUID V4):
d396d89f-c463-4e4a-8b16-267024f15c2f
Other Languages:
Malagasy:
Pegmatitan' Ambatofotsy, Kaominin'i Mahavelona, Distrikan'i Soavinandriana, Faritr'Itasy, Madagasikara
A granite LCT pegmatite, subtype Beryl-Columbite-Uranium that is famous for producing very large betafites. One of the largest crystal groups weighed 104 kg!
It is located 18 km W of the town Soavinandriana in the central highland of Madagascar (Besairie 1966, see Map in Behier 1963). The pegmatite dike is irregular, 300 m long and 30-40 m wide. The pegmatite with a typical large quartz core is hosted in an intensely lateritized gneiss with distinct N-S foliation. It is the most important uraniferous pegmatite in the Kitsamby-Antsirabe pegmatite district.
Formerly operated and owned by the Compagnie Lyonnaise de Madagascar, with a production of about 20 tons of betafite. It was worked before WW1. In 1948 the Commissariat à l'Énergie Atomique (CEA) reopened the mine. A total of 23,500 kg of euxenite and betafite were mined here (production from 50,000 tons of pegmatite mined).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
16 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
ⓘ Aeschynite-(Y) Formula: (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 Description: Described as "priorite" |
ⓘ Albite Formula: Na(AlSi3O8) |
ⓘ Albite var. Oligoclase Formula: (Na,Ca)[Al(Si,Al)Si2O8] |
ⓘ Anatase Formula: TiO2 Description: Variety xanthitane. Found as microscopic crystals in pseudomorphs after titanite. |
ⓘ Anatase var. Xanthitane Formula: TiO2 |
ⓘ Beryl Formula: Be3Al2(Si6O18) |
ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
ⓘ Bismuthinite Formula: Bi2S3 Description: Pseudomorphed to bismutite |
ⓘ Bismutite Formula: (BiO)2CO3 |
ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series' |
ⓘ Euxenite-(Y) Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
ⓘ 'Feldspar Group' Description: Giant crystals of perthite measuring 190 x 50m (!)has been observed here |
ⓘ 'Feldspar Group var. Perthite' Description: Giant crystals of perthite measuring 190 x 50m (!)has been observed here |
ⓘ Fergusonite-(Y) Formula: YNbO4 References: |
ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
ⓘ Microcline Formula: K(AlSi3O8) Colour: Pale salmon-pink |
ⓘ 'Pyrochlore Supergroup' Formula: A2-mD2X6-wZ1-n Description: The betafites occurs in pockets in biotite |
ⓘ 'Pyrochlore Supergroup var. Betafite (of Hogarth 1977)' Formula: (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH) Description: The betafites occurs in pockets in biotite |
ⓘ Quartz Formula: SiO2 |
ⓘ Quartz var. Amethyst Formula: SiO2 |
ⓘ Quartz var. Smoky Quartz Formula: SiO2 |
ⓘ Rutile Formula: TiO2 Description: As pseudomorphs after titanite. The pseudomorphs consists (in parts) of microscopic rutile crystals |
ⓘ Thorite Formula: Th(SiO4) Description: The variety "uranothorite" occurs here |
ⓘ Thorite var. Orangite Formula: Th(SiO4) |
ⓘ Thorite var. Uranothorite Formula: (Th,U)SiO4 References: Lacroix, Alfred (1922) Minéralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. Augustin Challamel, Paris. p.1-624. Farges, François, Calas, Georges (1991) Structural analysis of radiation damage in zircon and thorite: An X-ray absorption spectroscopic study. American Mineralogist, 76 (1-2) 60-73 with analysis of uranothorite from Ambatofotsy |
ⓘ Titanite Formula: CaTi(SiO4)O Description: Described as "Sphene".
Also pseudomorphs after sphene crystals (up to 5 cm large) |
ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
ⓘ Vermiculite Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
ⓘ Xenotime-(Y) Formula: Y(PO4) References: |
ⓘ Zircon Formula: Zr(SiO4) |
ⓘ Zircon var. Cyrtolite Formula: Zr[(SiO4),(OH)4] References: |
ⓘ Zircon var. Malacon Formula: Zr(SiO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Bismuthinite | 2.DB.05 | Bi2S3 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
ⓘ | var. Amethyst | 4.DA.05 | SiO2 |
ⓘ | var. Smoky Quartz | 4.DA.05 | SiO2 |
ⓘ | Rutile | 4.DB.05 | TiO2 |
ⓘ | Anatase | 4.DD.05 | TiO2 |
ⓘ | var. Xanthitane | 4.DD.05 | TiO2 |
ⓘ | Aeschynite-(Y) | 4.DF.05 | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
ⓘ | Euxenite-(Y) | 4.DG.05 | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Bismutite | 5.BE.25 | (BiO)2CO3 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
ⓘ | Fergusonite-(Y) | 7.GA.05 | YNbO4 |
Group 8 - Phosphates, Arsenates and Vanadates | |||
ⓘ | Xenotime-(Y) | 8.AD.35 | Y(PO4) |
Group 9 - Silicates | |||
ⓘ | Zircon var. Malacon | 9.AD.30 | Zr(SiO4) |
ⓘ | Thorite var. Uranothorite | 9.AD.30 | (Th,U)SiO4 |
ⓘ | Zircon var. Cyrtolite | 9.AD.30 | Zr[(SiO4),(OH)4] |
ⓘ | 9.AD.30 | Zr(SiO4) | |
ⓘ | Thorite var. Orangite | 9.AD.30 | Th(SiO4) |
ⓘ | 9.AD.30 | Th(SiO4) | |
ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
ⓘ | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
ⓘ | Vermiculite | 9.EC.50 | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
ⓘ | Microcline | 9.FA.30 | K(AlSi3O8) |
ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
ⓘ | var. Oligoclase | 9.FA.35 | (Na,Ca)[Al(Si,Al)Si2O8] |
Unclassified | |||
ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
ⓘ | 'Pyrochlore Supergroup var. Betafite (of Hogarth 1977)' | - | (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH) |
ⓘ | 'Feldspar Group var. Perthite' | - | |
ⓘ | '' | - | |
ⓘ | 'Columbite-(Fe)-Columbite-(Mn) Series' | - | |
ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
ⓘ | 'Pyrochlore Supergroup' | - | A2-mD2X6-wZ1-n |
ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
H | ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977) | (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH) |
H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
H | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
H | ⓘ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
Be | Beryllium | |
Be | ⓘ Beryl | Be3Al2(Si6O18) |
B | Boron | |
B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
C | Carbon | |
C | ⓘ Bismutite | (BiO)2CO3 |
O | Oxygen | |
O | ⓘ Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
O | ⓘ Albite | Na(AlSi3O8) |
O | ⓘ Quartz var. Amethyst | SiO2 |
O | ⓘ Anatase | TiO2 |
O | ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977) | (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH) |
O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
O | ⓘ Bismutite | (BiO)2CO3 |
O | ⓘ Beryl | Be3Al2(Si6O18) |
O | ⓘ Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
O | ⓘ Fergusonite-(Y) | YNbO4 |
O | ⓘ Microcline | K(AlSi3O8) |
O | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
O | ⓘ Thorite var. Orangite | Th(SiO4) |
O | ⓘ Quartz | SiO2 |
O | ⓘ Rutile | TiO2 |
O | ⓘ Quartz var. Smoky Quartz | SiO2 |
O | ⓘ Thorite | Th(SiO4) |
O | ⓘ Titanite | CaTi(SiO4)O |
O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
O | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
O | ⓘ Xenotime-(Y) | Y(PO4) |
O | ⓘ Zircon | Zr(SiO4) |
O | ⓘ Anatase var. Xanthitane | TiO2 |
O | ⓘ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
O | ⓘ Thorite var. Uranothorite | (Th,U)SiO4 |
O | ⓘ Garnet Group | X3Z2(SiO4)3 |
O | ⓘ Zircon var. Malacon | Zr(SiO4) |
F | Fluorine | |
F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Na | Sodium | |
Na | ⓘ Albite | Na(AlSi3O8) |
Na | ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977) | (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH) |
Na | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Mg | Magnesium | |
Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Mg | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
Al | Aluminium | |
Al | ⓘ Albite | Na(AlSi3O8) |
Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Al | ⓘ Beryl | Be3Al2(Si6O18) |
Al | ⓘ Microcline | K(AlSi3O8) |
Al | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Al | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
Si | Silicon | |
Si | ⓘ Albite | Na(AlSi3O8) |
Si | ⓘ Quartz var. Amethyst | SiO2 |
Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Si | ⓘ Beryl | Be3Al2(Si6O18) |
Si | ⓘ Microcline | K(AlSi3O8) |
Si | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Si | ⓘ Thorite var. Orangite | Th(SiO4) |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
Si | ⓘ Thorite | Th(SiO4) |
Si | ⓘ Titanite | CaTi(SiO4)O |
Si | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
Si | ⓘ Zircon | Zr(SiO4) |
Si | ⓘ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
Si | ⓘ Thorite var. Uranothorite | (Th,U)SiO4 |
Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
Si | ⓘ Zircon var. Malacon | Zr(SiO4) |
P | Phosphorus | |
P | ⓘ Xenotime-(Y) | Y(PO4) |
S | Sulfur | |
S | ⓘ Bismuthinite | Bi2S3 |
K | Potassium | |
K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
K | ⓘ Microcline | K(AlSi3O8) |
Ca | Calcium | |
Ca | ⓘ Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
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 |
Ca | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Ca | ⓘ Titanite | CaTi(SiO4)O |
Ti | Titanium | |
Ti | ⓘ Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
Ti | ⓘ Anatase | TiO2 |
Ti | ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977) | (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH) |
Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Ti | ⓘ Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
Ti | ⓘ Rutile | TiO2 |
Ti | ⓘ Titanite | CaTi(SiO4)O |
Ti | ⓘ Anatase var. Xanthitane | TiO2 |
Fe | Iron | |
Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Fe | ⓘ Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
Y | Yttrium | |
Y | ⓘ Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
Y | ⓘ Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
Y | ⓘ Fergusonite-(Y) | YNbO4 |
Y | ⓘ Xenotime-(Y) | Y(PO4) |
Zr | Zirconium | |
Zr | ⓘ Zircon | Zr(SiO4) |
Zr | ⓘ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
Zr | ⓘ Zircon var. Malacon | Zr(SiO4) |
Nb | Niobium | |
Nb | ⓘ Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
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 | ⓘ Fergusonite-(Y) | YNbO4 |
Ce | Cerium | |
Ce | ⓘ Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
Ta | Tantalum | |
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 |
Bi | Bismuth | |
Bi | ⓘ Bismuthinite | Bi2S3 |
Bi | ⓘ Bismutite | (BiO)2CO3 |
Th | Thorium | |
Th | ⓘ Aeschynite-(Y) | (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6 |
Th | ⓘ Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
Th | ⓘ Thorite var. Orangite | Th(SiO4) |
Th | ⓘ Thorite | Th(SiO4) |
Th | ⓘ Thorite var. Uranothorite | (Th,U)SiO4 |
U | Uranium | |
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 |
U | ⓘ Thorite var. Uranothorite | (Th,U)SiO4 |
Other Regions, Features and Areas containing this locality
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.