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Northwest Africa 12182 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12182 This is an OFFICIAL meteorite name. Abbreviation: NWA 12182 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: 122.5 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 226 approved meteorites classified as Eucrite-br. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 9 Nov 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12182 (NWA 12182) (Northwest Africa) Purchased: 2017 Classification: HED achondrite (Eucrite, brecciated) History: The meteorite was bought from a local meteorite dealer in Tagant, Mauritania. Physical characteristics: Grayish individual partly covered with fusion crust. Petrography: The meteorite is a fine-grained basaltic breccia composed of up to 2 mm sized basaltic clasts and up to 3.5 mm sized impact melt clasts set into a basaltic matrix. Mineral phases are predominantly up to 400 μm sized pyroxene and lath shaped calcic plagioclase. Pyroxene often shows magmatic zoning attesting to a low degree of thermal metamorphism. Minor phases include silica, ilmenite, chromite, and troilite. No metallic iron has been detected. Geochemistry: low-Ca pyroxene: Fs42.3±8.3Wo4.1±1.4 (Fs30.5-54.4Wo1.9-6.3, n=11, FeO/MnO=28-39); Ca-pyroxene: Fs29.6±2.2Wo37.5±5.9 (Fs25.8-34.4Wo23.1-41.6, n=10, FeO/MnO=29-36); calcic plagioclase: An88.8±4.0 (An81.0-93.4, n=15) | ||||||||||||||||||||||||||||
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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