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Northwest Africa 13549 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13549 This is an OFFICIAL meteorite name. Abbreviation: NWA 13549 Observed fall: No Year found: 2020 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 12 Dec 2020 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 109:
Northwest Africa 13549 (NWA 13549) (Northwest Africa) Purchased: 2020 Classification: HED achondrite (Eucrite) History: The meteorite was purchased from a dealer in Morocco. Physical characteristics: Dark-grayish fragment with some fusion crust. Petrography: The meteorite is an unbrecciated basalt composed of fine- and coarse-grained regions dominated by exsolved pyroxenes and often lath-shaped calcic plagioclase. Grain sizes vary from about 80 to 500 µm for pyroxene and about 50 to 700 µm for plagioclase. Minor phases include silica, chromite, ilmenite, and FeS; no metallic iron has been detected. Geochemistry: low-Ca pyroxene: Fs55.2±0.4Wo7.9±0.5 (Fs54.6-56.0Wo7.1-8.8, n=11, FeO/MnO=28-30); Ca-pyroxene: Fs29.7±1.0Wo40.1±1.4 (Fs27.8-31.3Wo38.3-43.1, n=11, FeO/MnO=26-29); calcic plagioclase: An84.5±1.4 (An81.5-85.7, n=12) | ||||||||||||||||||||||||||||
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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |