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| Smeïra 001 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Smeïra 001 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2021 Country: Algeria Mass:  49.2 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 636 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 17 Oct 2021 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Smeïra 001 28º40.1429’N, 6º25.9676’W Tindouf, Algeria Find: 2020 Oct 8 Classification: Carbonaceous chondrite (CM2) History: Six small stones weighing a total of 49.24 g were found on October 8, 2020, by Abba Ali while hunting foxes in Hamada Du Draa Desert near the N50 highway in Algeria. These meteorites were sent to Dave Lehman by an associate in Tindouf. Physical characteristics: Samples have dark gray-dark brown exteriors and are angular in shape. The cut face shows the interior has a chondritic texture composed of sparse chondrules and CAIs set within a dark colored matrix. Petrography: Description and classification (A. Love, App) Sample has a porous, matrix-dominated (~70 vol%) chondritic texture with dispersed chondrules, isolated mineral grains and CAIs, all of which are mantled by dust rims. Chondrules have an average apparent diameter of 204µm (n=123). Chondrule mesostasis and some phenocrysts have undergone alteration into hydrous mineral phases. Additional minerals: chromite, calcite, Mg-spinel, apatite, troilite, pentlandite. Geochemistry: (A. Love, App) Olivine Fa12.2±13.7 (Fa0.4-34.5, Cr2O3 in ferroan olivine=0.4±0.1, n=14); low-Ca pyroxene Fs3.8±5.2Wo2.7±2.7 (Fs0.5-12.7Wo0.2-5.6, n=5). Classification: Carbonaceous chondrite (CM2). Based on textures (dust rims), chondrule size, matrix abundance and mineral compositions, sample is a CM2. Specimens: Dave Lehman and his partner (NWA Direct) holds the main masses. A polished thin section and a 10 g sliced individual are on deposit at App. | ||||||||||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
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| References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:
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Statistics: This is 1 of 60 approved meteorites from Tindouf, Algeria (plus 1 impact crater) This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||||||||
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| Also see: |
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| Revision history: |
This lists important revisions made to data for this record.
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