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Northwest Africa 11949 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11949 This is an OFFICIAL meteorite name. Abbreviation: NWA 11949 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 280 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 15 Sep 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11949 (NWA 11949) (Northwest Africa) Purchased: 2018 Classification: HED achondrite (Eucrite) History: The meteorite was purchased from a local meteorite dealer in Laâyoune, Western Sahara. Physical characteristics: Greyish individual partly covered with fusion crust. Petrography: The meteorite is an unbrecciated basalt predominantly composed of exsolved pyroxene and mostly lath-shaped calcic plagioclase with average grain sizes of about 300 μm. Several regions of the rock have a pronounced spherulitic appearance due to sprays of pyroxene and plagioclase. Minor phases include silica, ilmenite, chromite, and troilite. No metallic iron has been detected. Geochemistry: low-Ca pyroxene: Fs57.7±0.3Wo1.9±0.3 (Fs57.1-58.1Wo1.6-2.9, n=14, FeO/MnO=33-35); Ca-pyroxene: Fs23.7±0.3Wo44.6±0.5 (Fs23.3-24.6Wo43.2-45.1, n=14, FeO/MnO=29-35); calcic plagioclase: An81.8±2.5 (An76.9-84.7, n=10) | ||||||||||||||||||||||||||||
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 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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