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Northwest Africa 5012
Basic information Name: Northwest Africa 5012
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5012
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 700 g
Meteoritical Bulletin:  MB 105  (2016)  L3-6
Recommended:  L3-6    [explanation]

This is 1 of 61 approved meteorites classified as L3-6.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 31 Mar 2016
Writeup from MB 105:

Northwest Africa 5012 (NWA 5012)

(Northwest Africa)

Purchased: 2007

Classification: Ordinary chondrite (L3-6)

History: The meteorite was found by an anonymous finder in northwest Africa and bought by the main mass holder in Morocco.

Physical characteristics: One brownish fragment without fusion crust weighing 700 g was found.

Petrography: The sample is a brecciated meteorite consisting of light-gray and more brownish angular clasts of different petrologic types. Plagioclase grain size in L5 clasts is about 25 μm and in L6 clasts about 60 μm. In the type 3 fragments chondrules are well recognizable.

Geochemistry: In type 3 lithology, olivine and pyroxene are unequilibrated with Fa14.5±8.1 (3.0-36.9, n=22) and Fs12.9±6.9Wo 0.7±0.6 (Fs3.4-23.9Wo0.1-2.2, n=26). Type 6 fragments are completely recrystallized and the silicates show homogeneous chemical composition at Fa25.0±0.2, n=33 and Fs19.8±0.5Wo1.9±0.2, n=34.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2007
Mass (g):700
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):14.5±8.1 (3.0-36.9, n=22); 25.0±0.2 (n=33)
Ferrosilite (mol%):12.9±6.9 (3.4-23.9, n=26); 21.1±0.3 (n=34)
Wollastonite (mol%):0.7±0.6 (0.1-2.2, n=26); 1.9±0.2 (n=34)
Classifier:A. Greshake, MNB
Type spec mass (g):37.6
Type spec location:MNB
Main mass:Harald Stehlik
Comments:Submitted by Ansgar Greshake
   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)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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