Vohimena deposit (Vohimena Nord), Tranomaro, Amboasary Sud District, Anosy, Madagascari
| Regional Level Types | |
|---|---|
| Vohimena deposit (Vohimena Nord) | Deposit |
| Tranomaro | Commune |
| Amboasary Sud District | District |
| Anosy | Region |
| Madagascar | Country |
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Latitude & Longitude (WGS84):
24° South , 46° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~27km
Type:
Köppen climate type:
Mindat Locality ID:
27790
Long-form identifier:
mindat:1:2:27790:6
GUID (UUID V4):
565c6435-23b5-4ae8-966d-28987f869c75
Other Languages:
Malagasy:
Vohimena, Kaominin'i Tranomaro, Distrikan' Amboasary Atsimo, Faritr' Anosy, Madagasikara
A thorianite deposit situated east of the town Tranomaro in the southeastern part of Madagascar. Delbos found here in 1954 crystals of hibonite in a plagioclasite embedded in a pyroxenite. The hibonite -bearing rock formed a 50 cm thick vein which was, at the time possible to follow for several 10s of meters. This was the 2. known locality for this species.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 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:
| ⓘ Anorthite Formula: Ca(Al2Si2O8) |
| ⓘ Anorthite var. Bytownite Formula: (Ca,Na)[Al(Al,Si)Si2O8] |
| ⓘ Corundum Formula: Al2O3 Colour: blue Description: Delbos (1955) reported the find of a blue corundum with an inclusion of hibonite in the eluvials of the deposit |
| ⓘ Hibonite Formula: CaAl12O19 Habit: crystals with fusiform habitus Colour: black Description: Fusiform crystals up to several cm embedded in plagioclasite |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Description: with a content of bytownite of 80% |
| ⓘ 'Scapolite' |
| ⓘ 'Scapolite var. Wernerite' |
| ⓘ Spinel Formula: MgAl2O4 Colour: green Description: small crystals in the hibonite-bearing plagoclasite |
| ⓘ Titanite Formula: CaTi(SiO4)O Description: as small crystals in the pyroxenite |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Spinel | 4.BB.05 | MgAl2O4 |
| ⓘ | Corundum | 4.CB.05 | Al2O3 |
| ⓘ | Hibonite | 4.CC.45 | CaAl12O19 |
| Group 9 - Silicates | |||
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Anorthite | 9.FA.35 | Ca(Al2Si2O8) |
| ⓘ | var. Bytownite | 9.FA.35 | (Ca,Na)[Al(Al,Si)Si2O8] |
| Unclassified | |||
| ⓘ | 'Scapolite var. Wernerite' | - | |
| ⓘ | '' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Anorthite | Ca(Al2Si2O8) |
| O | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| O | ⓘ Corundum | Al2O3 |
| O | ⓘ Hibonite | CaAl12O19 |
| O | ⓘ Spinel | MgAl2O4 |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | Sodium | |
| Na | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Spinel | MgAl2O4 |
| Al | Aluminium | |
| Al | ⓘ Anorthite | Ca(Al2Si2O8) |
| Al | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Al | ⓘ Corundum | Al2O3 |
| Al | ⓘ Hibonite | CaAl12O19 |
| Al | ⓘ Spinel | MgAl2O4 |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Anorthite | Ca(Al2Si2O8) |
| Si | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ca | Calcium | |
| Ca | ⓘ Anorthite | Ca(Al2Si2O8) |
| Ca | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Ca | ⓘ Hibonite | CaAl12O19 |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ti | Titanium | |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
Other Regions, Features and Areas containing this locality
Madagascar
- Anosy
- Amboasary Sud District
- Tranomaro-Maromby areaMineral Occurrence Area
- Amboasary Sud District
- ⭔Tuléar Province (Toliara)Province
Somali PlateTectonic Plate
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References
