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Northwest Africa 12699 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12699 This is an OFFICIAL meteorite name. Abbreviation: NWA 12699 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 61 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 82 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 18 Aug 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12699 (NWA 12699) (Northwest Africa) Purchased: 2018 Classification: Carbonaceous chondrite (CK3) History: The meteorite was purchased from a local meteorite dealer in Erfoud, Morocco. Physical characteristics: Dark brownish rock without fusion crust. Petrography: The meteorite is composed of sparse well defined chondrules (apparent mean diameter about 600 μm) set into abundant matrix dominated by Fe-rich olivine, plagioclase, and Cr-rich magnetite. Minor phases include low-Ca pyroxene, Ca-pyroxene, and FeNi-sulfides. Olivine and pyroxene appear equilibrated in the matrix and show strong compositional zoning in chondrules and chondrule fragments. The meteorite is a breccia and contains abundant and up to 1 mm wide shock melt veins. Geochemistry: Fe-rich matrix olivine: Fa32.3±0.4, FeO/MnO=110±8, n=10; unequilibrated olivine: Fa17.0±9.4 (Fa0.9-31.7, n=19); low-Ca pyroxene: Fs9.3±8.5Wo1.3±0.2 (Fs2.2-22.9Wo0.9-1.6, n=7); Ca-pyroxene: Fs10.3±1.0Wo45.0±3.1, n=12 | ||||||||||||||||||||||||||||||
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) Stehlik: Harald Stehlik, 1220 Wien, Austria (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: |
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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