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Northwest Africa 11837 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11837 This is an OFFICIAL meteorite name. Abbreviation: NWA 11837 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 4 Jul 2018 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 11837 (NWA 11837) (Northwest Africa) Purchased: 2018 Classification: HED achondrite (Eucrite) History: The meteorite was purchased from a local meteorite dealer in Morocco. Physical characteristics: Brownish individual with some fusion crust. Petrography: Unbrecciated medium-grained basaltic rock predominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase with average grains sizes of about 600 μm. Minor phases include silica, ilmenite, chromite, troilite, and metallic iron. Geochemistry: low-Ca pyroxene: Fs62.6±0.6Wo6.6±0.7 (Fs61.4-63.2Wo5.5-8.0, n=13, FeO/MnO=25-29); Ca-pyroxene: Fs34.4±0.2Wo39.6±0.3 (Fs34.1-34.8Wo39.1-40.1, n=14, FeO/MnO=26-30); calcic plagioclase: An88.1±0.5 (An87.2-88.9, n=13) | ||||||||||||||||||||||||||||
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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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |