Acfer 211 meteorite, Aguemour, Foggaret Ezzaouia, In Salah District, In Salah Province, Algeriai
| Regional Level Types | |
|---|---|
| Acfer 211 meteorite | Meteorite Fall Location |
| Aguemour | - not defined - |
| Foggaret Ezzaouia | Commune |
| In Salah District | District |
| In Salah Province | Province |
| Algeria | Country |
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Latitude & Longitude (WGS84):
27° 27' 53'' North , 3° 46' 54'' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
KΓΆppen climate type:
Mindat Locality ID:
272272
Long-form identifier:
mindat:1:2:272272:9
GUID (UUID V4):
198a9b43-35ee-409b-862e-53a2fb9699c8
Ordinary chondrite, unequilibrated & brecciated (H3.9,br; S2; W2)
Found,1991; 1009 g
The Acfer 211 meteorite is a small and moderately unequilibrated meteorite found during an expedition to the Sahara Desert. In thin sections, its most obvious constituents are distinct chondrules (~380 Β΅m, mean diam.) usually dominated by olivine, pyroxene (mostly orthopyroxene), and minor plagioclase. Olivine (Fa18.5Β±3.8) and, especially, pyroxene (Fs17.2.4Β±6.4) are unequilibrated. Aggregates of Fe-Ni metal and troilite are found in the interstices between chondrules. Mean composition of olivine and orthopyroxene are characteristic of the H (high iron) ordinary chondrite group. Undulatory extinction and irregular fractures of olivine are characteristic of mild shock (level S2). Weathering grade reflects a modest degree of rustiness.
A cosmic ray exposure age of ~27 Ma and estimated pre-terrestrial radius of 10 cm is reported by Romstedt et al. (1996).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
2 valid minerals.
Meteorite/Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
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Alphabetical List Tree DiagramDetailed Mineral List:
| β 'Fayalite-Forsterite Series' References: |
| β Forsterite Formula: Mg2SiO4 Description: A few grains of forsterite [sensu strictu, Fa<10] are found. |
| β 'Limonite' |
| β 'Meteoritic Iron' |
| β 'Orthopyroxene Subgroup' |
| β 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
| β 'Pyroxene Group' Formula: ADSi2O6 References: |
| β Troilite Formula: FeS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Troilite | 2.CC.10 | FeS |
| Group 9 - Silicates | |||
| β | Forsterite | 9.AC.05 | Mg2SiO4 |
| Unclassified | |||
| β | 'Limonite' | - | |
| β | 'Fayalite-Forsterite Series' | - | |
| β | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| β | 'Pyroxene Group' | - | ADSi2O6 |
| β | 'Meteoritic Iron' | - | |
| β | 'Orthopyroxene Subgroup' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Forsterite | Mg2SiO4 |
| O | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | β Pyroxene Group | ADSi2O6 |
| Na | Sodium | |
| Na | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | β Forsterite | Mg2SiO4 |
| Al | Aluminium | |
| Al | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | β Forsterite | Mg2SiO4 |
| Si | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | β Pyroxene Group | ADSi2O6 |
| S | Sulfur | |
| S | β Troilite | FeS |
| Ca | Calcium | |
| Ca | β Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Fe | Iron | |
| Fe | β Troilite | FeS |
Other Regions, Features and Areas containing this locality
African PlateTectonic Plate
- Oued Mya basinBasin
North Africa
- Sahara DesertDesert
Northwest Africa MeteoritesGroup of Meteorite Fall Locations
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References
