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Northwest Africa 4889 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 4889 This is an OFFICIAL meteorite name. Abbreviation: NWA 4889 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 258 approved meteorites classified as Mesosiderite. [show all] Search for other: Mesosiderites, Metal-rich meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 12 Mar 2019 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 4889 (NWA 4889) (Northwest Africa) Purchased: 2005 Classification: Mesosiderite History: The meteorite was purchased in 2005 from a local meteorite dealer in Zagora, Morocco. Physical characteristics: Fourteen dark-brownish fragments without fusion crust. Petrography: The meteorite is a breccia composed of silicate and metallic regions of highly variable portions. The metallic lithology consists of kamacite and taenite, the silica fraction is dominated by up to 2 µm sized low-Ca pyroxene, less abundant olivine, calcic plagioclase and minor silica and merrillite. Pyroxene often shows compositional zoning. Geochemistry: olivine: Fa9.2±0.7 (Fa8.2-10.6, n=20, FeO/MnO=32-47); low-Ca pyroxene: Fs34.6±3.9Wo7.0±2.0 (Fs30.0-40.6Wo4.9-10.8, n=15, FeO/MnO=20-25); calcic plagioclase: An93.5±0.3 (An93.0-94.0, n=15) | ||||||||||||||||||||||||||||||
Data from: MB108 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) Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |