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Northwest Africa 12346
Basic information Name: Northwest Africa 12346
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12346
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 12.6 kg
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  L5
Recommended:  L5    [explanation]

This is 1 of 7227 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
Writeuphelp
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:
Place of purchase:Erfoud, Morocco
Date:P 2017 Feb
Mass (g):12600
Pieces:1
Class:L5
Shock stage:S3
Weathering grade:W4
Fayalite (mol%):24.4± 0.3 (N=10)
Ferrosilite (mol%):20.6± 0.4 (N=10)
Wollastonite (mol%):1.1± 0.1 (N=10)
Classifier:P. Reger, UWO
Type spec mass (g):89.6
Type spec location:UWO
Main mass:S. Tutorow
Comments:G701; submitted by A. Bouvier, UWO
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ryan Upchurch   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1680 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

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