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Northwest Africa 11742 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11742 This is an OFFICIAL meteorite name. Abbreviation: NWA 11742 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 97 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 7 Apr 2018 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 11742 (NWA 11742) (Northwest Africa) Purchased: 2016 Classification: HED achondrite (Eucrite, melt breccia) History: The meteorite was bought from a local meteorite dealer in Quarzazate, Morocco. Physical characteristics: Brownish individual without fusion crust. Petrography: The meteorite is a melt breccia composed of up to 5 mm sized basaltic clasts set into shock melted matrix. Basaltic clasts consist of exsolved pyroxenes and often lath shaped calcic plagioclase. The shock melt is mostly recrystallized to plagioclase and pyroxene; some regions show pronounced flow textures. Minor phases include silica, chromite, ilmenite and barite. Geochemistry: low-Ca pyroxene: Fs59.9±0.9Wo4.0±1.3 (Fs57.4-61.1Wo2.2-7.6, n=14, FeO/MnO=33-37); Ca-pyroxene: Fs27.8±1.2Wo42.1±1.2 (Fs26.2-30.1Wo39.7-43.8, n=16, FeO/MnO=33-39); calcic plagioclase: An90.6±0.8 (An89.3-91.9, n=16) | ||||||||||||||||||||||||||||
Data from: MB107 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. 107, MAPS 55, 460-462
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Photos: |
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |