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Northwest Africa 4903 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 4903 This is an OFFICIAL meteorite name. Abbreviation: NWA 4903 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: 280 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 406 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 17 Oct 2021 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 4903 (NWA 4903) (Northwest Africa) Purchased: 2007 Classification: HED achondrite (Eucrite, polymict) History: The meteorite was purchased from a local meteorite dealer in Tagounite, Morocco. Physical characteristics: Dark grayish rock without fusion crust. Petrography: The meteorite is a polymict breccia composed of up to 7 mm sized basaltic, gabbroic, and impact melt clasts and mineral fragments set in a fine-grained clastic matrix. Main minerals are exsolved pyroxene, compositionally zoned low-Ca pyroxene, and calcic plagioclase. Minor phases include silica, chromite, FeS, ilmenite, and fayalite. No metallic iron was found. Geochemistry: low-Ca pyroxene: Fs51.0±1.0Wo2.9±0.7 (Fs49.4-52.5Wo1.9-3.9, FeO/MnO=28-32, n=12); augite exsolution lamellae: Fs23.9±1.5Wo43.4±0.9 (Fs21.7-27.3Wo41.5-44.2, FeO/MnO=25-32, n=11); zoned low-Ca pyroxene: Fs35.9±4.9Wo5.4±0.7 (Fs29.4-43.0Wo4.6-6.8, n=10, FeO/MnO=26-33, n=10); calcic plagioclase: An90.8±4.5 (An84.6-95.9, n=12) | ||||||||||||||||||||||||||||
Data from: MB110 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., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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