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Ankazoabo sapphire deposit, Maromby, Amboasary Sud District, Anosy, Madagascari
| Regional Level Types | |
|---|---|
| Ankazoabo sapphire deposit | Deposit |
| Maromby | Commune |
| Amboasary Sud District | District |
| Anosy | Region |
| Madagascar | Country |
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Latitude & Longitude (WGS84):
24° 24' 47'' South , 46° 30' 23'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Other Languages:
Malagasy:
Ankazoabo, Kaominin'i Maromby, Distrikan' Amboasary Atsimo, Faritr' Anosy, Madagasikara
One of the major sapphire deposits in the region. The main site (24°24'46.50"S/46°30'22.86"E) was mined on a semi-industrial scale in the late 1990s (by Nantin Ltd. of Malaysia and artisanal local workers). The whole site of sapphire diggings is approximately 1000m long and up to 150m wide, the overall strike is approximately N10°. The local miners follow narrow, subhorizontal plagioclasite veins in weathered "cipolin", a humite group-phlogopite rich marble, or dig for eluvial sapphires.
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
5 valid minerals.
Detailed Mineral List:
| ⓘ Calcite Formula: CaCO3 References: |
| ⓘ Corundum Formula: Al2O3 References: |
| ⓘ Corundum var. Sapphire Formula: Al2O3 References: |
| ⓘ Humite ? Formula: Mg7(SiO4)3F2 Description: A Humite group mineral found i marbles were visually identified as Humite. It is impossible by visual means only to distinguish between different members of the Humite Farouk. Analyzed Humite group minerals from the same area is identified by xrd as clinohumite. References: |
| ⓘ 'Humite Group' References: Wolfgang Hampel, site visit 13 August 2005Identified by Knut Edvard Larsen: Visual Identification |
| ⓘ Phlogopite Formula: KMg3(AlSi3O10)(OH)2 References: |
| ⓘ Spinel Formula: MgAl2O4 References: |
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 |
| ⓘ | var. Sapphire | 4.CB.05 | Al2O3 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| ⓘ | Humite ? | 9.AF.50 | Mg7(SiO4)3F2 |
| ⓘ | Phlogopite | 9.EC.20 | KMg3(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Humite Group' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Corundum | Al2O3 |
| O | ⓘ Humite | Mg7(SiO4)3F2 |
| O | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| O | ⓘ Corundum var. Sapphire | Al2O3 |
| O | ⓘ Spinel | MgAl2O4 |
| F | Fluorine | |
| F | ⓘ Humite | Mg7(SiO4)3F2 |
| Mg | Magnesium | |
| Mg | ⓘ Humite | Mg7(SiO4)3F2 |
| Mg | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Mg | ⓘ Spinel | MgAl2O4 |
| Al | Aluminium | |
| Al | ⓘ Corundum | Al2O3 |
| Al | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Al | ⓘ Corundum var. Sapphire | Al2O3 |
| Al | ⓘ Spinel | MgAl2O4 |
| Si | Silicon | |
| Si | ⓘ Humite | Mg7(SiO4)3F2 |
| Si | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| K | Potassium | |
| K | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
Other Regions, Features and Areas containing this locality
AfricaContinent
African Plate
- Bekily BlockShield
Madagascar
- Anosy
- Amboasary Atsimo District
- Tranomaro-Maromby areaMineral Occurrence Area
- Amboasary Atsimo District
- ⭔Tuléar Province (Toliara)Province
Somali PlateTectonic Plate
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Ankazoabo sapphire deposit, Maromby, Amboasary Sud District, Anosy, Madagascar