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Northwest Africa 12756 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12756 This is an OFFICIAL meteorite name. Abbreviation: NWA 12756 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 100 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 520 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 18 Aug 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12756 (NWA 12756) (Northwest Africa) Purchased: 2019 Classification: HED achondrite (Diogenite) History: The meteorite was purchased from a local meteorite dealer in Morocco. Physical characteristics: Grayish, slightly greenish rock with some fusion crust. Petrography: Fragmental breccia predominantly composed of up to 5 mm sized orthopyroxene crystals set into fine-grained related matrix. Some of the pyroxenes display magmatic zoning. Minor phases include calcic plagioclase, silica, chromite, FeS, and FeNi-sulfides. No metallic Fe has been detected. Geochemistry: unzoned blocky pyroxene: Fs28.5.0±0.2Wo1.3±0.1 (Fs28.1-28.7Wo1.2-1.4, n=15, FeO/MnO=26-29); magmatically zoned pyroxene: Fs24.3±1.1Wo2.0±0.6 (Fs23.2-26.4Wo1.3-2.8, n=16, FeO/MnO=26-32); olivine: Fa36.1±0.4 (Fa35.4-36.5, n=13, FeO/MnO=47±2); calcic plagioclase: An91.9±3.0 (An85.7-94.7, n=15) | ||||||||||||||||||||||||||||||
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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