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| Northwest Africa 12796 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12796 This is an OFFICIAL meteorite name. Abbreviation: NWA 12796 Observed fall: No Year found: 2013 Country: Morocco Mass:  91 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 86 approved meteorites classified as CK3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 20 Oct 2019 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Northwest Africa 12796 (NWA 12796) Morocco Purchased: 2013 Sep Classification: Carbonaceous chondrite (CK3) History: Catalogued in the Royal Ontario Museum Collections as LM57472. Physical characteristics: Fusion crust visible on portions of hand sample. Millimeter-sized chondrules and CAIs visible set in a greenish-yellow matrix. Petrography: Sample contains 70% fine grained matrix (<10 μm) with some grains in the 100 μm range. The sample contains 15-20% chondrules and CAIs 10%. Average chondrule size is 1 mm in diameter. Chondrules, CAIs and matrix contain plagioclase (plagioclase abundance >10 vol%). Matrix has greenish-yellow colour. Magnetite has an average of 2.2 wt% Cr2O3. Geochemistry: Olivine is somewhat heterogeneous in the sample (Fa coefficient of variation = 60.8%, Fa PMD = 54.45%). Olivine in the matrix is more fayalitic (Fa34.5) than in chondrules (Fa16.8). Orthopyroxene in the sample is enstatitic in composition, and clinopyroxene ranged from augite to diopside, with the average composition being augite. Plagioclase An42.4±25.6 (N = 28). Classification: Carbonaceous chondrite (CK3) with minimal weathering and shock. | ||||||||||||||||||||||||||||||
| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
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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:
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Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
| Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
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| Revision history: |
This lists important revisions made to data for this record.
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