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Besakoa, Maromby, Amboasary Sud District, Anosy, Madagascari
| Regional Level Types | |
|---|---|
| Besakoa | - not defined - |
| Maromby | Commune |
| Amboasary Sud District | District |
| Anosy | Region |
| Madagascar | Country |
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Other/historical names associated with this locality:
Gisement Guillemin
Other Languages:
Malagasy:
Besakoa, Kaominin'i Maromby, Distrikan' Amboasary Atsimo, Faritr' Anosy, Madagasikara
Locality close to Maromby, between Andranondambo and Esiva. Behier (1960) called this locality "gisement Guillemin."
Plagioclasites in the "Guillemin layer" contains large crystals of hibonite.
A large 8 cm (!) in diameter, platy hexagonal hibonite crystal found here is in the collection of Musee de l'Ecole des Mines in Paris, France.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Diopside Formula: CaMgSi2O6 References: |
| ⓘ Hibonite Formula: CaAl12O19 Habit: platy hexagonal Description: Crystals up to 8cm across has been found. References: |
| ⓘ 'Scapolite' References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hibonite | 4.CC.45 | CaAl12O19 |
| Group 9 - Silicates | |||
| ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
| Unclassified | |||
| ⓘ | 'Scapolite' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Diopside | CaMgSi2O6 |
| O | ⓘ Hibonite | CaAl12O19 |
| Mg | Magnesium | |
| Mg | ⓘ Diopside | CaMgSi2O6 |
| Al | Aluminium | |
| Al | ⓘ Hibonite | CaAl12O19 |
| Si | Silicon | |
| Si | ⓘ Diopside | CaMgSi2O6 |
| Ca | Calcium | |
| Ca | ⓘ Diopside | CaMgSi2O6 |
| Ca | ⓘ Hibonite | CaAl12O19 |
Other Regions, Features and Areas containing this locality
Madagascar
- Anosy
- Amboasary Sud District
- Tranomaro-Maromby areaMineral Occurrence Area
- Amboasary Sud District
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References
Rakotondrazafy, Michel A. F., Moine, B., Cuney, M. (1996) Mode of formation of hibonite (CaAl 12 O 19 ) within the U-Th skarns from the granulites of S-E Madagascar. Contributions to Mineralogy and Petrology, 123 (2) 190-201 doi:10.1007/s004100050150Sample of hibonite from Besakoa is used in the study]
