Aioun el Atrouss meteorite, Ayoun El Atrous, Hodh el Gharbi Region, Mauritaniai
| Regional Level Types | |
|---|---|
| Aioun el Atrouss meteorite | Meteorite Fall Location |
| Ayoun El Atrous | - not defined - |
| Hodh el Gharbi Region | Region |
| Mauritania | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
16° 23' 53'' North , 9° 34' 13'' West
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Aioun | 12,635 (2017) | 29.7km |
Diogenite, polymict
Fell 17 Apr 1974, 1 kg
After a fireball and a sonic boom, meteorite material was recovered from three separate sites in the desert. The meteorite is primarily made of homogeneous orthopyroxene (En74) accompanied by minor chromite. Modal analyses reveal a meteorite with more than 95 vol% orthopyroxene, ~1 vol% clinopyroxene, ≤1 vol% chromite and traces of other phases. However, a Eucritic clast which accounts for 5-10% of the meteorite appears to have a more variegated mineralogy with a pyroxene-plagioclase intergrowth accompanied by minor amounts of ferroan pigeonite and augite, silica, chromite, ilmenite, and metallic iron. A cosmic ray exposure age of ~12.5 million years is not unlike other Diogenites and other members of the HED group (Howardite-Eucrite-Diogenite) of achondrites.
The recent DAWN mission to Vesta has made it very clear that most Diogenites are fragments from asteroid 4 Vesta, the brightest asteroid. However, definitive statements about specific HED meteorite parent bodies are still some time away as a few HED meteorites have come from some other presently unknown asteroidal bodies.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
7 valid minerals.
Meteorite/Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Anorthite Formula: Ca(Al2Si2O8) Description: Plagioclase (An~85) Reference: Duke, M. B. (1978) Aioun El Atrouss - Evidence for thermal recrystallization of a eucrite breccia: Meteoritics 13(4): 443-448. (Dec 1978) |
| ⓘ Anorthite var. Bytownite Formula: (Ca,Na)[Al(Al,Si)Si2O8] Description: Plagioclase (An~85) Reference: Duke, M. B. (1978) Aioun El Atrouss - Evidence for thermal recrystallization of a eucrite breccia: Meteoritics 13(4): 443-448. (Dec 1978) |
| ⓘ Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Reference: Duke, M. B. (1978) Aioun El Atrouss - Evidence for thermal recrystallization of a eucrite breccia: Meteoritics 13(4): 443-448. (Dec 1978) |
| ⓘ Augite var. Ferroaugite Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976) |
| ⓘ Chromite Formula: Fe2+Cr3+2O4 Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976); Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997); Bowman, L. E., Papike, J. J. & Spilde, M. N. (1999) Diogenites as asteroidal cumulates: Insights from spinel chemistry: American Mineralogist: 84 (7-8): 1020–1026. (July-August 1999) |
| ⓘ 'Clinopyroxene Subgroup' Reference: Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997) |
| ⓘ 'Fayalite-Forsterite Series' Reference: Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997) |
| ⓘ Ilmenite Formula: Fe2+TiO3 Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976) |
| ⓘ Iron Formula: Fe Description: Fe metal in clast (Nickel content not provided) Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976) |
| ⓘ 'Orthopyroxene Subgroup' Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976); Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997) |
| ⓘ Pigeonite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Description: Ferroan pigeonite in Eucrite clast Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976); Duke, M. B. (1978) Aioun El Atrouss - Evidence for thermal recrystallization of a eucrite breccia: Meteoritics 13(4): 443-448. (Dec 1978) |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Reference: Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997) |
| ⓘ 'Silica' Description: Silica is reported for the Eucrite clast Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976); Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997) |
| ⓘ Troilite Formula: FeS Reference: Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976); Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Iron | 1.AE.05 | Fe |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| Group 9 - Silicates | |||
| ⓘ | Anorthite | 9.FA.35 | Ca(Al2Si2O8) |
| ⓘ | var. Bytownite | 9.FA.35 | (Ca,Na)[Al(Al,Si)Si2O8] |
| ⓘ | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ | var. Ferroaugite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ | Pigeonite | 9.DA.10 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Clinopyroxene Subgroup' | - | |
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Orthopyroxene Subgroup' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ | 'Silica' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | ⓘ Anorthite | Ca(Al2Si2O8) |
| Na | Sodium | |
| Na | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Mg | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Al | Aluminium | |
| Al | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Al | ⓘ Anorthite | Ca(Al2Si2O8) |
| Si | Silicon | |
| Si | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | ⓘ Anorthite | Ca(Al2Si2O8) |
| S | Sulfur | |
| S | ⓘ Troilite | FeS |
| Ca | Calcium | |
| Ca | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ca | ⓘ Anorthite | Ca(Al2Si2O8) |
| Ti | Titanium | |
| Ti | ⓘ Ilmenite | Fe2+TiO3 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | ⓘ Iron | Fe |
| Fe | ⓘ Troilite | FeS |
| Fe | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Lomena, I.S.M., Toure, F., Gibson, E.K. Jr., Clanton, U.S. & Reid, A.M. (1976) Aioun el Atrouss: a new hypersthene achondrite with eucritic inclusions. Meteoritics 11 (1): 451-57. (Mar 1976)
Duke, M. B. (1978) Aioun EL Atrouss - Evidence for thermal recrystallization of a eucrite breccia: Meteoritics 13(4): 443-448. (Dec 1978)
Bowman, L.E., Spilde, M.N. & Papike, P.P. (1997) Automated dispersive spectrometer modal analysis applied to diogenites. Meteoritics & Planetary Science 32 (6): 869-875. (Nov 1997)
Bowman, L. E., Papike, J. J. & Spilde, M. N. (1999) Diogenites as asteroidal cumulates: Insights from spinel chemistry: American Mineralogist: 84 (7-8): 1020–1026. (July-August 1999)
Grady, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
McSween, H. Y. Jr. & 11 others (1913). Dawn, the Vesta-HED connection; and the Geological context for eucrites, diogenites, and howardites. Meteoritics & Planetary Science 48 (13): 2090-2104. (Nov 2013)
External Links
http://www.lpi.usra.edu/meteor/metbull.php = Meteoritical Bulletin Database
Other Regions, Features and Areas containing this locality
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
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
