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Northwest Africa 5476 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 5476 This is an OFFICIAL meteorite name. Abbreviation: NWA 5476 Observed fall: No Year found: 2008 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 391 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 26 Sep 2017 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 106:
Northwest Africa 5476 (NWA 5476) (Northwest Africa) Purchased: 2008 Classification: HED achondrite (Eucrite, polymict) History: The meteorite was bought in 2008 from a Moroccan meteorite dealer in Erfoud, Morocco. Physical characteristics: Grayish individual partly covered by fusion crust. Petrography: The meteorite is a fine-grained breccia composed of lithic and mineral fragments set into a clastic matrix. Lithic fragments include basaltic and dark impact melt clasts. Dominant minerals in clasts and matrix are exsolved pyroxene and calcic plagioclase up to 400 µm in size. Some matrix pyroxenes display magmatic zoning. Minor phases include chromite, ilmenite, silica, pyrrhotite and metallic iron. The meteorite contains shock melt veins. Geochemistry: low-Ca pyroxene: Fs33.2±9.7Wo2.9±0.9 (Fs23.3-45.6Wo1.4-4.5, n=21, FeO/MnO=29-39); Ca-pyroxene: Fs20.8±1.7Wo40.5±2.7 (Fs17.5-27.4Wo34.7-44.5, n=18, FeO/MnO=26-33); calcic plagioclase: An85.9±4.0 (An77.3-91.9, n=15) | ||||||||||||||||||||||||||||
Data from: MB106 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Photos: |
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |