Ouallen meteorite, Bordj Badji Mokhtar, Bordj Badji Mokhtar District, Bordj Badji Mokhtar Province, Algeriai
| Regional Level Types | |
|---|---|
| Ouallen meteorite | Meteorite Fall Location |
| Bordj Badji Mokhtar | Commune |
| Bordj Badji Mokhtar District | District |
| Bordj Badji Mokhtar Province | Province |
| Algeria | Country |
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Latitude & Longitude (WGS84):
24° 10' North , 0° 5' East
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
KΓΆppen climate type:
Ordinary Chondrite (H6)
Find,1936; 5.174 kg
Multiple fragments of a chondritic meteorite were found in the desert with 11 fragments at one site (4.849 kg) and 2 additional fragments at another site several hundred meters away (325 g). Initial studies suggest an H-group ordinary chondrite of advanced petrologic grade. Average Olivine (Fa20) and Pyroxene (Fs18) are characteristic of H (relatively high in total iron) ordinary chondrites. However, in some portions of the meteorite, several types of chondrules in the 0.2-2.0 mm diameter range are reported with relatively distinct boundaries between chondrules and matrix. Porphyritic chondrules are dominant, but significant numbers of prominent and sometimes glassy barred olivine (BO) chondrules are also prominent in specimens studied by Oba et al. (1998). The primary silicates are accompanied by Fe-Ni metal, troilite, and minor diopsidic clinopyroxene. Accessory chromite, copper, and isocubanite are also reported. Rare grains of Fe-poor Clinoenstatite and Forsterite [sensu stricto] are also reported.
Classification Problematics. Textural features and compositional variability of major silicates reported by Oba et al. are often inconsistent with a normal H6 classification. Whether these petrologic oddities are indicative of occasional xenoliths or a possible misclassification is not obvious from the readily available sources cited here.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
9 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:
| β Chromite Formula: Fe2+Cr3+2O4 Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.; Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β Clinoenstatite Formula: MgSiO3 Description: Rare grains of clinoenstatite (and, perhaps, orthoenstatite) [sensu stricto] Fs3-5 are present. Reference: Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β 'Clinopyroxene Subgroup' Description: Ca-poor Clinopyroxene with ave. composition [Wo1.8En79.9Fs18.3] characteristic of H-group chondrites Reference: Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β Copper Formula: Cu Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| β Diopside Formula: CaMgSi2O6 Description: Ave. composition of diopsidic clinopyroxene is unremarkable [Wo34.7En52.7Fs12.6], but the composition is quite variable in both chondrules and matrix. Reference: Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β 'Fayalite-Forsterite Series' Description: Olivine Composition (Fa19) is characteristic of L-group chondrites (Mason, 1963). However, Oba et al.(1998) report significant variability within their specimen(s). Reference: Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).; Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β Forsterite Formula: Mg2SiO4 Description: Rare grains of Forsterite [sensu stricto] (Fa~7) are present. Reference: Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β 'Glass' Description: Glass is apparently largely of feldspathic composition and is particularly prominent in the interstices of barred olivine chondrules. Reference: Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β Iron Formula: Fe Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| β Iron var. Kamacite Formula: (Fe,Ni) Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.; Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
| β Isocubanite Formula: CuFe2S3 Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| β Taenite Formula: (Fe,Ni) Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| β Troilite Formula: FeS Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.; Oba, T., Nagase, K. & Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite: Bulletin Joetsu Univ. Educ. 17(2): 891-899. (March1998). |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Copper | 1.AA.05 | Cu |
| β | Iron | 1.AE.05 | Fe |
| β | var. Kamacite | 1.AE.05 | (Fe,Ni) |
| β | Taenite | 1.AE.10 | (Fe,Ni) |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Isocubanite | 2.CB.55b | CuFe2S3 |
| β | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| β | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| Group 9 - Silicates | |||
| β | Clinoenstatite | 9.DA.10 | MgSiO3 |
| β | Diopside | 9.DA.15 | CaMgSi2O6 |
| β | Forsterite | 9.AC.05 | Mg2SiO4 |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'Clinopyroxene Subgroup' | - | |
| β | 'Fayalite-Forsterite Series' | - | |
| β | 'Glass' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Chromite | Fe2+Cr23+O4 |
| O | β Clinoenstatite | MgSiO3 |
| O | β Diopside | CaMgSi2O6 |
| O | β Forsterite | Mg2SiO4 |
| Mg | Magnesium | |
| Mg | β Clinoenstatite | MgSiO3 |
| Mg | β Diopside | CaMgSi2O6 |
| Mg | β Forsterite | Mg2SiO4 |
| Si | Silicon | |
| Si | β Clinoenstatite | MgSiO3 |
| Si | β Diopside | CaMgSi2O6 |
| Si | β Forsterite | Mg2SiO4 |
| S | Sulfur | |
| S | β Isocubanite | CuFe2S3 |
| S | β Troilite | FeS |
| Ca | Calcium | |
| Ca | β Diopside | CaMgSi2O6 |
| Cr | Chromium | |
| Cr | β Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | β Chromite | Fe2+Cr23+O4 |
| Fe | β Isocubanite | CuFe2S3 |
| Fe | β Iron var. Kamacite | (Fe,Ni) |
| Fe | β Taenite | (Fe,Ni) |
| Fe | β Troilite | FeS |
| Fe | β Iron | Fe |
| Ni | Nickel | |
| Ni | β Iron var. Kamacite | (Fe,Ni) |
| Ni | β Taenite | (Fe,Ni) |
| Cu | Copper | |
| Cu | β Copper | Cu |
| Cu | β Isocubanite | CuFe2S3 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta: 27(9): 1011-1023 (Sept 1963).
Ramdohr, P. (1973) The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Oba, T., Nagase, K., Hayashi, A. (1998) Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite. Bulletin Joetsu Univ. Educ.: 17(2): 891-899 (March 1998).
Grady, M.M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
External Links
http://www.lpi.usra.edu/meteor/metbull.php - MeteoriticalBulletinDatabase
http://www.lpi.usra.edu/meteor/metbull.php?code=18048 -Ouallen@MetBullDatabase
http://www.encyclopedia-of-meteorites.com/test/ouallen_daillier.jpg βOuallen photo
http://www.lpi.usra.edu/meteor/metbull.php?code=18048 -Ouallen@MetBullDatabase
http://www.encyclopedia-of-meteorites.com/test/ouallen_daillier.jpg βOuallen photo
Other Regions, Features and Areas containing this locality
African PlateTectonic Plate
- Taoudenni basinBasin
- West African CratonCraton
North Africa
- Sahara DesertDesert
Northwest Africa MeteoritesGroup of Meteorite Fall Locations
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