Ambatoarina area, Ambatoarina, Andakatany, Manandriana District, Amoron'i Mania, Madagascari
| Regional Level Types | |
|---|---|
| Ambatoarina area | Area |
| Ambatoarina | Outcrop |
| Andakatany | Commune |
| Manandriana District | District |
| Amoron'i Mania | 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:
~1km
Type:
Köppen climate type:
Other/historical names associated with this locality:
"Imerina"
Other Languages:
Malagasy:
Ambatoarina, Ambatoarina, Kaominin' Andakatany, Distrikan'i Manandriana, Faritra Amoron'i Mania, Madagasikara
The now discredited Imerinite (see https://www.mindat.org/min-30900.html) was described from this locality. The amphibole was found enclosed in a metamorphic limestone located around Ambatoarina (Lacroix 1922: "environs d'Ambatoarina"), about 2-3 km from the confluence of the Mahanoro and the Vatomaro river along the old road going from Ambositra to Ambatofangehana.
This locality is not the same as the locality for "Ambatoarinite", see Ambatoarina (http://www.mindat.org/loc-156777.html)
Samples of "Imerinite" are often labelled as coming from "Imerina, Madagascar". Imerina was the name of the ancient Merina Kingdom in the high plateaux of Madagascar which Ambatoarina is a part of.
Note on the "Imerinite"
At the time of Leake (1978) imerinite was descredited as identical with magnesio-arfvedsonite. But after that date several revisions of the amphibole group has taken place. Recently, by IMA in 2014, the magnesio-arfvedsonite was redefined. The redefined magnesio-arfvedsonite is not the same as the "magnesio-arfvedsonite" by Leake (1978). One specimen of "Imerinite" analyzed by RRUFF turned out to be ferri-winchite. There are probably several amphibole species that occurs at the site. Newer analysis is need to establish which species in the amphibole supergroup imerinite should be labelled as.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Amphibole Supergroup' Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| ⓘ Dolomite Formula: CaMg(CO3)2 References: |
| ⓘ Ferri-winchite Formula: ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 Description: Deep black-blue bladed single crystals embedded in dolomite References: |
| ⓘ Formula: {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 Description: Imerinite was descredited in 1978 to be a synonym of Magnesio-arfvedsonite (s.l.) (Leake 1978). Magnesio-arvedsonite was again redefined/renamed by IMA in 2014, to establish which species "imerinite" now corresponds to, need further investigation.
|
| ⓘ Phlogopite Formula: KMg3(AlSi3O10)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Rutile Formula: TiO2 |
| ⓘ Titanite Formula: CaTi(SiO4)O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 9 - Silicates | |||
| ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| ⓘ | Ferri-winchite | 9.DE.20 | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| ⓘ | Magnesio-arfvedsonite ? | 9.DE.25 | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| ⓘ | Phlogopite | 9.EC.20 | KMg3(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Amphibole Supergroup' | - | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| H | ⓘ Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| H | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| H | ⓘ Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| C | Carbon | |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| O | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Titanite | CaTi(SiO4)O |
| O | ⓘ Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| F | Fluorine | |
| F | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Na | Sodium | |
| Na | ⓘ Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| Na | ⓘ Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | ⓘ Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| Mg | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Mg | ⓘ Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Al | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | ⓘ Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| Si | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Titanite | CaTi(SiO4)O |
| Si | ⓘ Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Cl | Chlorine | |
| Cl | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| K | Potassium | |
| K | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Titanite | CaTi(SiO4)O |
| Ca | ⓘ Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
| Ti | Titanium | |
| Ti | ⓘ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Ti | ⓘ Rutile | TiO2 |
| Ti | ⓘ Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | ⓘ Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Ferri-winchite | ◻(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
Other Regions, Features and Areas containing this locality
AfricaContinent
African Plate
- BemItremo BlockOrogenic Belt
Madagascar
- Ankaratra Volcanic RangeVolcanic Range
- ⭔Fianarantsoa ProvinceProvince
Somali PlateTectonic Plate
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Ambatoarina area, Ambatoarina, Andakatany, Manandriana District, Amoron'i Mania, Madagascar