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Erg Chech 008 | |||||||||||||||||||||||||||||||||||||||
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Basic information | Name: Erg Chech 008 This is an OFFICIAL meteorite name. Abbreviation: EC 008 Observed fall: No Year found: 2022 Country: Algeria Mass: 700 g | ||||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 188 approved meteorites classified as CR2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites | ||||||||||||||||||||||||||||||||||||||
Comments: | Approved 6 Aug 2022 | ||||||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Erg Chech 008 (EC 008) 26°01.92’N, 1°36.66’W Adrar, Algeria Purchased: 2022 Classification: Carbonaceous chondrite (CR2) History: The fragments were found by Mr. Ali Mftha while searching for meteorites in the Erg Chech 003 strewn field. Physical characteristics: Many dark brownish fragments without fusion crust. Petrography: The meteorite is predominantly composed of large, mostly porphyritic and partly metal-rimmed type I chondrules (apparent mean diameter about 1 mm) set into a fine-grained ferroan matrix. Few type II chondrule fragments and some small CAIs have been detected. Metal is present as rims around and as blobs within chondrules. Sulfides occur in type II chondrule fragments and the matrix. Matrix contains framboids of mostly rounded magnetite grains. Geochemistry: olivine in type I chondrules: Fa1.7±0.7 (Fa0.7-3.2, Cr2O3: 0.48±0.18 wt%, n=15; low-Ca pyroxene: Fs1.9±0.1Wo0.8±0.1 (Fs1.7-2.1Wo0.7-1.1, n=11); olivine in type II chondrules: Fa30.4±13.0 (Fa11.0-51.4, n=12). Matrix analyses yield FeO=34.7±1.2 wt% and an average total of 86.8±1.2 wt% (5 µm defocused beam, N=12), the latter indicating the presence of hydrous minerals. Classification: CR2 chondrite; likely paired with Erg Chech 003 | ||||||||||||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos: |
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Geography: |
Statistics: This is 1 of 200 approved meteorites from Adrar, Algeria (plus 1 unapproved name) This is 1 of 1336 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||||||||||
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Revision history: |
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