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Osumilite occurrence, Tranomaro, Amboasary Sud District, Anosy, Madagascari
| Regional Level Types | |
|---|---|
| Osumilite occurrence | Occurrence |
| Tranomaro | Commune |
| Amboasary Sud District | District |
| Anosy | Region |
| Madagascar | Country |
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Latitude & Longitude (WGS84):
24° 34' South , 46° 28' East
Latitude & Longitude (decimal):
Type:
Kรถppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Amboasary | 36,082 (2018) | 52.5km |
Outcrop of an osumilite-garnet gneiss
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
7 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| โ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| โ | Spinel | 4.BB.05 | MgAl2O4 |
| โ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| โ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| โ | Sillimanite | 9.AF.05 | Al2(SiO4)O |
| โ | Cordierite | 9.CJ.10 | Mg2Al4Si5O18 |
| โ | Osumilite | 9.CM.05 | Kโป2Fe2+2Al3[Al2Si10O30] |
| Unclassified | |||
| โ | 'Alkali Feldspar' | - | |
| โ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| โ | 'Monazite Group' | - | REE(PO4) |
| โ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| โ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | Oxygen | |
| O | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | โ Cordierite | Mg2Al4Si5O18 |
| O | โ Ilmenite | Fe2+TiO3 |
| O | โ Magnetite | Fe2+Fe23+O4 |
| O | โ Monazite Group | REE(PO4) |
| O | โ Osumilite | K◻2Fe22+Al3[Al2Si10O30] |
| O | โ Quartz | SiO2 |
| O | โ Sillimanite | Al2(SiO4)O |
| O | โ Spinel | MgAl2O4 |
| O | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | โ Garnet Group | X3Z2(SiO4)3 |
| F | Fluorine | |
| F | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Na | Sodium | |
| Na | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mg | โ Cordierite | Mg2Al4Si5O18 |
| Mg | โ Spinel | MgAl2O4 |
| Al | Aluminium | |
| Al | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | โ Cordierite | Mg2Al4Si5O18 |
| Al | โ Osumilite | K◻2Fe22+Al3[Al2Si10O30] |
| Al | โ Sillimanite | Al2(SiO4)O |
| Al | โ Spinel | MgAl2O4 |
| Al | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | โ Cordierite | Mg2Al4Si5O18 |
| Si | โ Osumilite | K◻2Fe22+Al3[Al2Si10O30] |
| Si | โ Quartz | SiO2 |
| Si | โ Sillimanite | Al2(SiO4)O |
| Si | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | โ Garnet Group | X3Z2(SiO4)3 |
| P | Phosphorus | |
| P | โ Monazite Group | REE(PO4) |
| K | Potassium | |
| K | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| K | โ Osumilite | K◻2Fe22+Al3[Al2Si10O30] |
| Ca | Calcium | |
| Ca | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ti | Titanium | |
| Ti | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ti | โ Ilmenite | Fe2+TiO3 |
| Fe | Iron | |
| Fe | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | โ Ilmenite | Fe2+TiO3 |
| Fe | โ Magnetite | Fe2+Fe23+O4 |
| Fe | โ Osumilite | K◻2Fe22+Al3[Al2Si10O30] |
Geochronology
Mineralization age: Neoproterozoic to Cambrian : 591 Ma to 515 MaImportant note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.
| Geologic Time | Rocks, Minerals and Events | ||||||
|---|---|---|---|---|---|---|---|
| Phanerozoic | |||||||
| Paleozoic | |||||||
| Cambrian | |||||||
| Cambrian Series 2 |
| ||||||
| Precambrian | |||||||
| Proterozoic | |||||||
| Neoproterozoic | |||||||
| Ediacaran |
| ||||||
Other Regions, Features and Areas containing this locality
AfricaContinent
African Plate
- Bekily BlockShield
Madagascar
- Anosy
- Amboasary Sud District
- Tranomaro-Maromby areaMineral Occurrence Area
- Amboasary Sud District
- ⭔Tulรฉar Province (Toliara)Province
Somali PlateTectonic Plate
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
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References
Holder, Robert M., Hacker, Bradley R., Horton, Forrest, Rakotondrazafy, A. F. Michel (2018) Ultrahigh-temperature osumilite gneisses in southern Madagascar record combined heat advection and high rates of radiogenic heat production in a long-lived high-Torogen. Journal of Metamorphic Geology, 36 (7) 855-880 doi:10.1111/jmg.12316
