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| Erg Atouila 002 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Erg Atouila 002 This is an OFFICIAL meteorite name. Abbreviation: EA 002 Observed fall: No Year found: 2020 Country: Mali Mass:  5 kg | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 518 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 25 May 2022 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Erg Atouila 002 (EA 002) 22º14.6184’N, 5º59.6502’W Gao, Mali Purchased: 2020 Classification: HED achondrite (Diogenite) History: A large number of pieces of different sizes, ranging from a few grams to the main masses of 1370, 561, and 535 g, were found in a region (see coordinates) 214 km SW of Taoudenni, Mali in Oct. and Nov 2020. Adrián Contreras Gómez (CRATER meteorites) purchased the samples from a meteorite dealer in Mauritania in July 2021. Physical characteristics: Sample has an ovoid shape and is yellowish orange in color. A small patch of black fusion crust covers a portion of the sample. Other areas show orange staining from oxidation. Petrography: Description and classification (A. Love, App) Sample is an aggregate of fractured, 250-1024 µm orthopyroxene grains. Orthopyroxenes contain exsolved Cpx inclusions. Additional minerals are: chromite, Si polymorphs, FeS and rare Ni-free iron metal. Breccia composed of coarse-grained lithic clasts and fine polycrystalline clasts of orthopyroxene. Silicates show blebs of FeS. Additional minerals are: chromite and troilite. polymorphs, FeS and rare Ni-free iron metal. Breccia composed of coarse-grained lithic clasts and fine polycrystalline clasts of orthopyroxene. Silicates show blebs of FeS. Additional minerals are: chromite and troilite. Geochemistry: (A. Love, App) low Ca pyroxene Fs24.7±0.1Wo1.9±0.0, Fe/Mn=26.7±0.9, n=10 Classification: HED achondrite (diogenite) Texture, mineralogy and Fe/Mn ratio suggest sample is a diogenite. Specimens: Adrián Contreras Gómez (CRATER meteorites) holds the 1370g main mass. A polished thin section and 42.1 g individual are on deposit at App. | ||||||||||||||||||||||||||||||||||||
| Data from: MB111 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 Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:
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Statistics: This is 1 of 28 approved meteorites from Gao, Mali (plus 1 unapproved name) This is 1 of 104 approved meteorites from Mali (plus 2 unapproved names) | ||||||||||||||||||||||||||||||||||||
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