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Northwest Africa 13469 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13469 This is an OFFICIAL meteorite name. Abbreviation: NWA 13469 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 27 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 104 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 11 Nov 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13469 (NWA 13469) (Northwest Africa) Purchased: July 2020 Classification: HED achondrite (Eucrite, melt breccia) History: The meteorite was bought by the main mass holder from an Algerian meteorite dealer. Physical characteristics: Dark-grayish rock with some fusion crust. Petrography: The meteorite is a melt-supported eucritic breccia composed of up to 0.4 mm sized basaltic and mineral clasts set into abundant shock melt. Dominant minerals are exsolved pyroxene and calcic plagioclase partly converted into maskelynite. Minor phases include silica, FeS, chromite, ilmenite, and secondary barite. No metallic iron has been detected. Geochemistry: low-Ca pyroxene: Fs59.8±0.7Wo2.4±0.4 (Fs57.9-60.7Wo2.0-3.7, n=14, FeO/MnO=26-30); Ca-pyroxene: Fs26.0±0.7Wo44.0±0.7 (Fs25.2-28.3Wo42.5-44.9, n=14, FeO/MnO=25-32); calcic plagioclase: An90.4±0.6 (An88.9-91.6, n=15) | ||||||||||||||||||||||||||||
Data from: MB109 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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