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Northwest Africa 12814 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12814 This is an OFFICIAL meteorite name. Abbreviation: NWA 12814 Observed fall: No Year found: 2019 Country: (Northwest Africa) Mass: 1235 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 128 approved meteorites classified as CK4. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 18 Aug 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12814 (NWA 12814) (Northwest Africa) Purchased: 2019 Classification: Carbonaceous chondrite (CK4) History: The meteorite was purchased from a local meteorite dealer in Morocco. Physical characteristics: Grayish rock partly covered with fusion crust. Petrography: The meteorite displays a greyish to slightly greenish interior and is predominantly consists of fine-grained recrystallized matrix dominated by ferrous olivine. Few chondrules with a mean diameter of about 700 µm are present. While olivine is equilibrated throughout the meteorite, low-Ca pyroxene shows compositional zoning in matrix and chondrules. Minor phases include intermediate plagioclase, Ca-pyroxene, and troilite. Cr-rich magnetite is abundant; metal is virtually absent. Geochemistry: olivine: Fa26.9±0.4 (FeO/MnO=97±10, n=15); low-Ca pyroxene: Fs15.1±6.5Wo1.8±1.2 (Fs3.4-22.5Wo0.8-4.2, n=19); Ca-pyroxene: Fs1.4±0.1Wo42.3±1.6, n=10; feldspar: An38.0±7.3Ab59.5±6.6Or2.5±0.7, n=11 | ||||||||||||||||||||||||||||||
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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