Voronkafotra (Vorokafotra; Vohidava mine), Ianabinda, Betroka District, Anosy, Madagascari
| Regional Level Types | |
|---|---|
| Voronkafotra (Vorokafotra; Vohidava mine) | - not defined - |
| Ianabinda | Commune |
| Betroka District | District |
| Anosy | Region |
| Madagascar | Country |
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Latitude & Longitude (WGS84):
23° South , 45° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~29km
Köppen climate type:
Other Languages:
Malagasy:
Voronkafotra (Vorokafotra), Kaominin' Ianabinda, Distrikan'i Betroka, Faritr' Anosy, Madagasikara
A classic locality for sapphirine situated close to the Route National nr 13 south of the town Betroka (between Betroka and Ianabinda). A sapphirine bearing rock (sakenite) is exposed in one the old phlogopite mines here (eg. Mahatsinjo mine) located near the village of Voronkafotra.
Phlogopite-bearing pyroxenites were mined for mica in three separate areas, Moraharivo, Mahatsinjo and Besakoa respectively. The concession for the old phlogopite mine was P.E. 229 SAINT-BEZARD (Besaire 1966).
The map coordinates given by Besaire (1966) for the phlogopite deposit is X= 292, Y= 348.
The locality is also referred to in the earlier literature as located about 35 km east of the ancient village of Itrongay in the southern part of Madagascar.
According to Behier (1960), this locality probably is A. Lacroix's sapphirine-locality (Lacroix 1922). Lacroix referred to the locality as being situated some 20s km east of Itrongay. A sapphirine-bearing rock (Sakenite) is described from Mahatsinjo (Besaire 1966).
In more recent times the locality (area) is referred to as Vohidava mine in Razakamanana et al. (2006).
According to Razakamanana et al. (2006), the lithology is a granitic, cordierite-garnet leucogneiss that is intercalated with layers of phlogopite-spinel-diopsidite, clinopyroxene-scapolite and spinel-clinohumite-forsterite-diopside-phlogopite marble and sapphirine-bearing granulites.
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Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities10 valid minerals.
Rock Types Recorded
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Rock list contains entries from the region specified including sub-localities
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Alphabetical List Tree DiagramDetailed Mineral List:
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 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| ⓘ | Sillimanite | 9.AF.05 | Al2(SiO4)O |
| ⓘ | Kornerupine | 9.BJ.50 | Mg3Al6(Si,Al,B)5O21(OH) |
| ⓘ | Cordierite | 9.CJ.10 | (Mg,Fe)2Al3(AlSi5O18) |
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
| ⓘ | Sapphirine | 9.DH.45 | Mg4(Mg3Al9)O4[Si3Al9O36] |
| ⓘ | Phlogopite | 9.EC.20 | KMg3(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'K Feldspar' | - | |
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| H | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| B | Boron | |
| B | ⓘ Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| O | ⓘ Corundum | Al2O3 |
| O | ⓘ Diopside | CaMgSi2O6 |
| O | ⓘ Enstatite | Mg2Si2O6 |
| O | ⓘ Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| O | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| O | ⓘ Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
| O | ⓘ Sillimanite | Al2(SiO4)O |
| O | ⓘ Spinel | MgAl2O4 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| F | Fluorine | |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Mg | Magnesium | |
| Mg | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Mg | ⓘ Diopside | CaMgSi2O6 |
| Mg | ⓘ Enstatite | Mg2Si2O6 |
| Mg | ⓘ Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| Mg | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Mg | ⓘ Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
| Mg | ⓘ Spinel | MgAl2O4 |
| Al | Aluminium | |
| Al | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Al | ⓘ Corundum | Al2O3 |
| Al | ⓘ Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| Al | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Al | ⓘ Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
| Al | ⓘ Sillimanite | Al2(SiO4)O |
| Al | ⓘ Spinel | MgAl2O4 |
| Si | Silicon | |
| Si | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Si | ⓘ Diopside | CaMgSi2O6 |
| Si | ⓘ Enstatite | Mg2Si2O6 |
| Si | ⓘ Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| Si | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | ⓘ Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
| Si | ⓘ Sillimanite | Al2(SiO4)O |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| K | Potassium | |
| K | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Diopside | CaMgSi2O6 |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Fe | Iron | |
| Fe | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
Localities in this Region
- Anosy
- Betroka District
- Ianabinda
- Voronkafotra (Vorokafotra; Vohidava mine)
- Ianabinda
- Betroka District
Other Regions, Features and Areas containing this locality
AfricaContinent
African Plate
- Bekily BlockShield
Madagascar
- ⭔Tuléar Province (Toliara)Province
Somali PlateTectonic Plate
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References
Lacroix, Alfred (1922) Minéralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. Augustin Challamel. 624 pp.
Behier, Jean (1960) Contribution à la minéralogie de Madagascar. Annales géologiques de Madagascar Vol. 29. République Malgachepp.46-46 - on kornerupine
Voronkafotra, Ianabinda, Betroka District, Anosy, Madagascar