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Rare Earth prospect, Unnamed caldera, Betaimboay, Antsirabe, Ambanja, Diana, Madagascari
| Regional Level Types | |
|---|---|
| Rare Earth prospect | Prospect |
| Unnamed caldera | Caldera |
| Betaimboay | Village |
| Antsirabe | Commune |
| Ambanja | District |
| Diana | Region |
| Madagascar | Country |
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Latitude & Longitude (WGS84):
13° 49' 12'' South , 48° 11' 50'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ambanja | 30,621 (2018) | 32.3km |
| Hell-Ville | 22,680 (2018) | 47.6km |
| Antafondro | 200 (2018) | 48.7km |
Other/historical names associated with this locality:
Tantalus project
Name(s) in local language(s):
, ,Betaimboay, Kaominin' Antsirabe, Distrikan' Ambanja, Faritr'i Diana, Faritanin' Antsiranana, Madagasikara
A roughly circular caldera measuring 7 km in diameter. Situated in the south-east of the Ambohimirahavavy Tertiary alkaline complex. Rare earth mineralization occurs in volcanic breccias, sandstones and other lithologies.
The Tantalus project is located within the sub-volcanic Ambohimirahavavy Alkaline Complex that is a member of the late Oligocene/early Miocene Ampasindava Alkali Province. Uranium-lead zircon age determinations for the complex give dates of ~24 Ma. The complex intruded Jurassic sediments of the Isalo Group: mudstones and siltstones interbedded with sandstones, marls and minor carbonates. Ambohimirahavavy is oval in shape, 20 x 8 km in size, and consists of two sub-circular intrusive bodies interpreted as caldera structures; they comprise an association of nepheline syenite and saturated to over-saturated syenites, partially covered by their volcanic equivalents.
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
18 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:
| ⓘ Albite Formula: Na(AlSi3O8) References: |
| ⓘ Anatase Formula: TiO2 References: |
| ⓘ Anatase var. Niobium-bearing Anatase Formula: (Ti,Nb)O2 References: |
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) References: |
| ⓘ Baddeleyite Formula: ZrO2 |
| ⓘ 'Bastnäsite' Formula: (Ce/Nd/Y/REE)(CO3)F |
| ⓘ Bastnäsite-(Ce) Formula: Ce(CO3)F References: |
| ⓘ Bastnäsite-(La) Formula: La(CO3)F References: |
| ⓘ Calcite Formula: CaCO3 References: |
| ⓘ 'Carbonate' |
| ⓘ 'Chevkinite Group' |
| ⓘ 'Chlorite Group' References: |
| ⓘ Eudialyte Formula: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| ⓘ Fluorite Formula: CaF2 References: |
| ⓘ Goethite Formula: Fe3+O(OH) References: |
| ⓘ Laumontite Formula: CaAl2Si4O12 · 4H2O References: |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Marcasite Formula: FeS2 References: |
| ⓘ 'Monazite Group' Formula: REE(PO4) |
| ⓘ Nepheline Formula: Na3K(Al4Si4O16) |
| ⓘ 'Parisite' Formula: Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| ⓘ Pyrite Formula: FeS2 References: |
| ⓘ 'Pyrochlore Group' Formula: A2Nb2(O,OH)6Z |
| ⓘ Rhabdophane-(Nd) Formula: Nd(PO4) · H2O References: |
| ⓘ 'Synchysite' Formula: Ca(Ce/Nd/Y/REE)(CO3)2F |
| ⓘ Synchysite-(Ce) Formula: CaCe(CO3)2F References: |
| ⓘ Synchysite-(Y) Formula: CaY(CO3)2F References: |
| ⓘ Zircon Formula: Zr(SiO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Marcasite | 2.EB.10a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | 'Pyrochlore Group' | 4.00. | A2Nb2(O,OH)6Z |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Anatase | 4.DD.05 | TiO2 |
| ⓘ | var. Niobium-bearing Anatase | 4.DD.05 | (Ti,Nb)O2 |
| ⓘ | Baddeleyite | 4.DE.35 | ZrO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Bastnäsite-(Ce) | 5.BD.20a | Ce(CO3)F |
| ⓘ | Bastnäsite-(La) | 5.BD.20a | La(CO3)F |
| ⓘ | Synchysite-(Ce) | 5.BD.20c | CaCe(CO3)2F |
| ⓘ | Synchysite-(Y) | 5.BD.20c | CaY(CO3)2F |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Rhabdophane-(Nd) | 8.CJ.45 | Nd(PO4) · H2O |
| Group 9 - Silicates | |||
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| ⓘ | Eudialyte | 9.CO.10 | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| ⓘ | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| ⓘ | Laumontite | 9.GB.10 | CaAl2Si4O12 · 4H2O |
| Unclassified | |||
| ⓘ | 'Bastnäsite' | - | (Ce/Nd/Y/REE)(CO3)F |
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Monazite Group' | - | REE(PO4) |
| ⓘ | 'Parisite' | - | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| ⓘ | 'Synchysite' | - | Ca(Ce/Nd/Y/REE)(CO3)2F |
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
| ⓘ | 'Chevkinite Group' | - | |
| ⓘ | 'Carbonate' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| H | ⓘ Pyrochlore Group | A2Nb2(O,OH)6Z |
| H | ⓘ Rhabdophane-(Nd) | Nd(PO4) · H2O |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| C | Carbon | |
| C | ⓘ Bastnäsite-(Ce) | Ce(CO3)F |
| C | ⓘ Bastnäsite-(La) | La(CO3)F |
| C | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| C | ⓘ Synchysite-(Y) | CaY(CO3)2F |
| C | ⓘ Parisite | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| C | ⓘ Synchysite | Ca(Ce/Nd/Y/REE)(CO3)2F |
| O | Oxygen | |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Anatase | TiO2 |
| O | ⓘ Baddeleyite | ZrO2 |
| O | ⓘ Bastnäsite-(Ce) | Ce(CO3)F |
| O | ⓘ Bastnäsite-(La) | La(CO3)F |
| O | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Monazite Group | REE(PO4) |
| O | ⓘ Nepheline | Na3K(Al4Si4O16) |
| O | ⓘ Pyrochlore Group | A2Nb2(O,OH)6Z |
| O | ⓘ Rhabdophane-(Nd) | Nd(PO4) · H2O |
| O | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| O | ⓘ Synchysite-(Y) | CaY(CO3)2F |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Parisite | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| O | ⓘ Synchysite | Ca(Ce/Nd/Y/REE)(CO3)2F |
| O | ⓘ Anatase var. Niobium-bearing Anatase | (Ti,Nb)O2 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| F | Fluorine | |
| F | ⓘ Bastnäsite-(Ce) | Ce(CO3)F |
| F | ⓘ Bastnäsite-(La) | La(CO3)F |
| F | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| F | ⓘ Fluorite | CaF2 |
| F | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| F | ⓘ Synchysite-(Y) | CaY(CO3)2F |
| F | ⓘ Parisite | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| F | ⓘ Synchysite | Ca(Ce/Nd/Y/REE)(CO3)2F |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| Na | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Al | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Si | Silicon | |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| Si | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Si | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Si | ⓘ Zircon | Zr(SiO4) |
| P | Phosphorus | |
| P | ⓘ Monazite Group | REE(PO4) |
| P | ⓘ Rhabdophane-(Nd) | Nd(PO4) · H2O |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | ⓘ Marcasite | FeS2 |
| S | ⓘ Pyrite | FeS2 |
| Cl | Chlorine | |
| Cl | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| K | Potassium | |
| K | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| Ca | ⓘ Fluorite | CaF2 |
| Ca | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Ca | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| Ca | ⓘ Synchysite-(Y) | CaY(CO3)2F |
| Ca | ⓘ Parisite | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| Ca | ⓘ Synchysite | Ca(Ce/Nd/Y/REE)(CO3)2F |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ti | Titanium | |
| Ti | ⓘ Anatase | TiO2 |
| Ti | ⓘ Anatase var. Niobium-bearing Anatase | (Ti,Nb)O2 |
| Fe | Iron | |
| Fe | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Marcasite | FeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Y | Yttrium | |
| Y | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| Y | ⓘ Synchysite-(Y) | CaY(CO3)2F |
| Y | ⓘ Synchysite | Ca(Ce/Nd/Y/REE)(CO3)2F |
| Zr | Zirconium | |
| Zr | ⓘ Baddeleyite | ZrO2 |
| Zr | ⓘ Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| Zr | ⓘ Zircon | Zr(SiO4) |
| Nb | Niobium | |
| Nb | ⓘ Pyrochlore Group | A2Nb2(O,OH)6Z |
| Nb | ⓘ Anatase var. Niobium-bearing Anatase | (Ti,Nb)O2 |
| La | Lanthanum | |
| La | ⓘ Bastnäsite-(La) | La(CO3)F |
| La | ⓘ Parisite | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| Ce | Cerium | |
| Ce | ⓘ Bastnäsite-(Ce) | Ce(CO3)F |
| Ce | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| Ce | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| Ce | ⓘ Parisite | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| Ce | ⓘ Synchysite | Ca(Ce/Nd/Y/REE)(CO3)2F |
| Nd | Neodymium | |
| Nd | ⓘ Bastnäsite | (Ce/Nd/Y/REE)(CO3)F |
| Nd | ⓘ Rhabdophane-(Nd) | Nd(PO4) · H2O |
| Nd | ⓘ Parisite | Ca(Ce/La/Nd/REE)2(CO3)3F2 |
| Nd | ⓘ Synchysite | Ca(Ce/Nd/Y/REE)(CO3)2F |
Other Regions, Features and Areas containing this locality
AfricaContinent
African Plate
- Antongil BlockCraton
- Diego Ambilobe basinBasin
Madagascar
- ⭔Antsiranana ProvinceProvince
Somali PlateTectonic Plate
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Rare Earth prospect, Unnamed caldera, Betaimboay, Antsirabe, Ambanja, Diana, Madagascar