Ialamitana Pegmatites, Sahanivotry Manandona, Antsirabe II District, Vakinankaratra, Madagascari
| Regional Level Types | |
|---|---|
| Ialamitana Pegmatites | Pegmatite Field |
| Sahanivotry Manandona | Commune |
| Antsirabe II District | Rural District |
| Vakinankaratra | Region |
| Madagascar | Country |
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Latitude & Longitude (WGS84):
20° South , 47° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~12km
Type:
Köppen climate type:
Other/historical names associated with this locality:
Ialamaitana
Other Languages:
Malagasy:
Ialamitana, Kaominin'i Sahanivotry Manandona, Distrikan' Antsirabe II, Vakinankaratra, Madagasikara
The locality Ialamitana consists of several pegmatites, of which only a few have been exploited. One of the workings has produced green, opaque beryls, and the Antsotsara pegmatite, which is close by, has produced good up to 3 cm large, well-shaped trapezohedra of red garnets (almandine-spessartine series) and good crystals of "strüverite". It is located in a mountainous area 2 km east of Isahanivotry (south of Antsirabe), near the Manandona Valley and close to the Vorondolo Massif.
The locality is most probably the one referred to as "a new almandine garnet locality" situated "6 km southeast of the Manandona and 30 km south of Antsirabe" by Moore (1997, 1998). Many good pieces were found here in 1996.
The name Ialamaitana is a misnomer (spelling mistake).
Note on the mineral list: Samples labelled as "strüverite" from this locality are identified as ilmenorutile. See message board at https://www.mindat.org/mesg-556616.html#570104
The locality is most probably the one referred to as "a new almandine garnet locality" situated "6 km southeast of the Manandona and 30 km south of Antsirabe" by Moore (1997, 1998). Many good pieces were found here in 1996.
The name Ialamaitana is a misnomer (spelling mistake).
Note on the mineral list: Samples labelled as "strüverite" from this locality are identified as ilmenorutile. See message board at https://www.mindat.org/mesg-556616.html#570104
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities7 valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Almandine Formula: Fe2+3Al2(SiO4)3 |
| ⓘ 'Almandine-Spessartine Series' |
| ⓘ Beryl Formula: Be3Al2(Si6O18) |
| ⓘ Columbite-(Fe) Formula: Fe2+Nb2O6 References: |
| ⓘ Hematite Formula: Fe2O3 References: |
| ⓘ 'K Feldspar' References: |
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ Quartz var. Rose Quartz Formula: SiO2 |
| ⓘ Rutile Formula: TiO2 References: |
| ⓘ Rutile var. Ilmenorutile Formula: (Ti,Nb)O2 References: |
| ⓘ Rutile var. Strüverite ? Formula: (Ti,Ta,Fe)O2 Description:
Samples labelled as "strüverite" from this locality are identified as ilmenorutile. See Message board at https://kubrick.mindat.org/mesg-556616.html#570104 |
| ⓘ Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ 'Tourmaline' Formula: AD3G6(T6O18)(BO3)3X3Z References: |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Rose Quartz | 4.DA.05 | SiO2 |
| ⓘ | Rutile var. Ilmenorutile | 4.DB.05 | (Ti,Nb)O2 |
| ⓘ | 4.DB.05 | TiO2 | |
| ⓘ | var. Strüverite ? | 4.DB.05 | (Ti,Ta,Fe)O2 |
| ⓘ | Columbite-(Fe) | 4.DB.35 | Fe2+Nb2O6 |
| Group 9 - Silicates | |||
| ⓘ | Almandine | 9.AD.25 | Fe2+3Al2(SiO4)3 |
| ⓘ | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Unclassified | |||
| ⓘ | 'Tourmaline' | - | AD3G6(T6O18)(BO3)3X3Z |
| ⓘ | 'Almandine-Spessartine Series' | - | |
| ⓘ | 'K Feldspar' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Be | Beryllium | |
| Be | ⓘ Beryl | Be3Al2(Si6O18) |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| O | ⓘ Beryl | Be3Al2(Si6O18) |
| O | ⓘ Columbite-(Fe) | Fe2+Nb2O6 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Rutile var. Ilmenorutile | (Ti,Nb)O2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Quartz var. Rose Quartz | SiO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Rutile var. Strüverite | (Ti,Ta,Fe)O2 |
| O | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| O | ⓘ Almandine-Spessartine Series | |
| Na | Sodium | |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | Aluminium | |
| Al | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Al | ⓘ Beryl | Be3Al2(Si6O18) |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Almandine-Spessartine Series | |
| Si | Silicon | |
| Si | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Si | ⓘ Beryl | Be3Al2(Si6O18) |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Quartz var. Rose Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Almandine-Spessartine Series | |
| Ti | Titanium | |
| Ti | ⓘ Rutile var. Ilmenorutile | (Ti,Nb)O2 |
| Ti | ⓘ Rutile | TiO2 |
| Ti | ⓘ Rutile var. Strüverite | (Ti,Ta,Fe)O2 |
| Mn | Manganese | |
| Mn | ⓘ Almandine-Spessartine Series | |
| Fe | Iron | |
| Fe | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Fe | ⓘ Columbite-(Fe) | Fe2+Nb2O6 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Fe | ⓘ Rutile var. Strüverite | (Ti,Ta,Fe)O2 |
| Fe | ⓘ Almandine-Spessartine Series | |
| Nb | Niobium | |
| Nb | ⓘ Columbite-(Fe) | Fe2+Nb2O6 |
| Nb | ⓘ Rutile var. Ilmenorutile | (Ti,Nb)O2 |
| Ta | Tantalum | |
| Ta | ⓘ Rutile var. Strüverite | (Ti,Ta,Fe)O2 |
Localities in this Region
- Vakinankaratra
- Antsirabe II District
- Sahanivotry Manandona
- Ialamitana Pegmatites
- Sahanivotry Manandona
- Antsirabe II District
Other Regions, Features and Areas containing this locality
AfricaContinent
African Plate
- Antenanarivo BlockOrogenic Belt
Madagascar
- Ankaratra Volcanic RangeVolcanic Range
- ⭔Antananarivo ProvinceProvince
- ⭔Vorondolo pegmatite fieldDistrict
Somali PlateTectonic Plate
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References
Ialamitana Pegmatites, Sahanivotry Manandona, Antsirabe II District, Vakinankaratra, Madagascar