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Northwest Africa 12815 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12815 This is an OFFICIAL meteorite name. Abbreviation: NWA 12815 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 10 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 635 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 18 Aug 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12815 (NWA 12815) (Northwest Africa) Purchased: 2019 Classification: Carbonaceous chondrite (CM2) History: The meteorite was purchased from a local meteorite dealer in Morocco. Physical characteristics: Many small black fragments some of which partly covered with fusion crust. Petrography: The meteorite is a chondritic breccia dominated by fine-grained almost opaque matrix composed of flaky phyllosilicates, sulfides, Ca-carbonates and rare FeNi metal, the latter mostly enclosed within olivine. Embedded in this matrix are chondrules (mean diameter about 250 μm), chondrule pseudomorphs, mineral fragments, and rare CAIs most of which are surrounded by fine-grained dust rims. Chondrule mesostasis has completely been replaced by alteration products. Geochemistry: FeO in carbonate about 1 wt% | ||||||||||||||||||||||||||||||
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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Photos: |
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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