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| Northwest Africa 12346 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 12346 This is an OFFICIAL meteorite name. Abbreviation: NWA 12346 Observed fall: No Year found: 2017 Country: Morocco Mass:  12.6 kg | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 8641 approved meteorites (plus 4 unapproved names) classified as L5. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
| Comments: | Approved 27 Nov 2018 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 107:
Northwest Africa 12346 (NWA 12346) Morocco Purchased: 2017 Feb Classification: Ordinary chondrite (L5) Physical characteristics: Small stone with visible oxidation of the matrix. Petrography: (P. Reger, UWO) Mostly olivine and pyroxene, recrystallized matrix, with few secondary plagioclase grains (generally smaller than 50 μm), metal abundance ~ 5%, large chondrules generally easily discernible, smaller ones have fewer sharp boundaries. Mostly PP, RP chondrules, some POP and BO chondrules; mean diameter ~0.5 mm, larger (>0.5 mm) round, but fractured, smaller ones (<0.5 mm) can be less rounded; chondrule glass absent. Undulutory extinction in olivine and pyroxene, in addition to planar fractures in olivine (S3). All metal oxidized, but no alteration in silicates visible (W4). Geochemistry: (EMPA, M. Beauchamp, UWO) Olivine (Fa24.4±0.3; Fe/Mn = 45.7±1.6; n=10), Orthopyroxene (Fs20.6±0.4Wo1.1±0.1, n=10), Plagioclase An9.7±0.7 (n=6). Maximum Ni content in metal phases is > 20%. Bulk rock ICP-MS analysis shows enrichment of incompatible rare earth elements compared to CI chondrites in G701 Classification: Ordinary chondrite L5 (W4, S3) Specimens: 89.6 g including a thin section at UWO. S. Tutorow holds the main mass. | ||||||||||||||||||||||||||||||
| Data from: MB107 Table 0 Line 0: |
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| Institutions and collections |
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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| Photos: |
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Geography:
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Statistics: This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||