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| El Milhas 004 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: El Milhas 004 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2022 Country: Mauritania Mass:  3 kg | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 273 approved meteorites classified as Mesosiderite. [show all] Search for other: Mesosiderites, Metal-rich meteorites | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 19 Mar 2023 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 112:
El Milhas 004 25.280°N, 5.874°W Tiris Zemmour, Mauritania Purchased: 2022 Jul Classification: Mesosiderite History: Found near Chegga, Mauritania, purchased in June 2022 by Ziyao Wang from a dealer in Zug, Morocco, and sold to Zonghui Han in July 2022. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) The specimen is composed predominantly of orthopyroxene and extensively altered kamacite, together with pigeonite, calcic plagioclase, olivine, silica polymorph, merrillite, troilite and minor chromite (in symplectitic intergrowth with olivine). The pervasive Fe oxide veining precludes reliable estimation of sizes of silicate grains, but their mean grainsize is at least 0.5 mm. Modal abundances: weathered metal ~40 vol%, silicates ~60 vol.% Geochemistry: Orthopyroxene (Fs29.6-34.6Wo2.6-4.4, FeO/MnO = 21-28, N = 11; Fs17.6Wo1.5, FeO/MnO = 23), pigeonite (Fs30.7Wo9.2, FeO/MnO = 22), olivine (Fa17.8-23.4, FeO/MnO = 35-38, N = 3), plagioclase (An88.6-96.0Or0.2-0.0, N = 5). Classification: Mesosiderite. Specimens: 40.1 g including one polished thin section at UWB; remainder with Zonghui Han. | ||||||||||||||||||||||||||||||||||||
| Data from: MB112 Table 0 Line 0: |
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| Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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| Photos: |
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Geography:
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Statistics: This is 1 of 28 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater) This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 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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