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Northwest Africa 12668 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12668 This is an OFFICIAL meteorite name. Abbreviation: NWA 12668 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 27 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 595 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 27 Jun 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12668 (NWA 12668) (Northwest Africa) Purchased: 2018 Classification: HED achondrite (Eucrite) History: The meteorite was purchased from a local meteorite dealer in Laayoune, Mauritania. Physical characteristics: Dark-grayish rock without fusion crust. Petrography: The meteorite is a breccia with few basaltic clasts set into a coarse-grained clastic matrix predominantly composed of exsolved pyroxene and calcic plagioclase with average grain sizes of about 400 µm. Minor phases include silica, chromite, FeS, ilmenite, and barite; no metallic Fe has been found. The meteorite contains some shock melt veins. Geochemistry: low-Ca pyroxene: Fs60.7±0.7Wo2.4±0.5 (Fs58.9-61.8Wo2.1-3.9, n=17, FeO/MnO=29-32); Ca-pyroxene: Fs26.8±1.4Wo43.2±1.5 (Fs25.7-31.0Wo38.3-44.1, n=12, FeO/MnO=30-34); calcic plagioclase: An91.3±0.9 (An89.5-93.1, n=13) | ||||||||||||||||||||||||||||
Data from: MB108 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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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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