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| El Milhas 005 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: El Milhas 005 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2023 Country: Mauritania Mass:  1272 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 14 approved meteorites classified as Mesosiderite-A3. [show all] Search for other: Class A mesosiderites, Mesosiderites, and Metal-rich meteorites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 13 Nov 2023 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 112:
El Milhas 005 25.433804, -5.922480 Tiris Zemmour, Mauritania Find: 2022 Classification: Mesosiderite (group A3) History: This meteorite was found in northern Mauritania, October 2022, about 15 km northwest of Chegga. Purchased by Brett Joseph Cohen in 2023. Physical characteristics: Saw cut slice reveals numerous irregular but distinctly segregated metal domains >1 mm. Disseminated, fine-grained metal is absent. Metal appears fresh with little oxidation. Some larger pyroxene poikiloblasts up to 1-cm are visible in a finer grained silicate groundmass. Macroscopically, the approximate modal abundances are ~70% silicates and ~30% metals and opaques. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 25% plagioclase present. There is also minor but ubiquitous silica throughout, mostly in the form of blade-like crystals. Minor troilite was detected. No olivine was found. Both kamacite and taenite are present. No brecciation observed. Geochemistry: (M.Spilde, UNM) Low-Ca pyroxene Fs29.3±7.7Wo4.9±3.7, Fe/Mn=28±3, n=8; plagioclase An90.9±4.2Ab8.6±3.9Or0.5±0.3, n=5. Classification: Mesosiderite-A3. Relatively high abundance of plagioclase and silica consistent with group A. Segregated metal, presence of some texturally and chemically equilibrated silicates, and absence of brecciation consistent with type 3. Specimens: 23 g on deposit at UNM, Brett Joseph Cohen holds the main mass. | ||||||||||||||||||||||||||||||||
| Data from: MB112 Table 0 Line 0: |
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| Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Geography:
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Statistics: This is 1 of 26 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater) This is 1 of 212 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||
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