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Northwest Africa 12003
Basic information Name: Northwest Africa 12003
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12003
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 47 g
Meteoritical Bulletin:  MB 108  (2020)  CK6
Recommended:  CK6    [explanation]

This is 1 of 83 approved meteorites classified as CK6.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 10 Mar 2019
Writeup from MB 108:

Northwest Africa 12003 (NWA 12003)


Purchased: February 2018

Classification: Carbonaceous chondrite (CK6)

History: Purchased from Adam Aaronson during the Tucson Gem and Mineral show February 2018.

Physical characteristics: Dark-gray stone with darker gray/black crust covering about 60%. Stone shows evidence of sand polishing.

Petrography: (C. Herd and L. Tunney, UAb) Optical and microprobe examination of a polished thin section shows an unbrecciated texture consisting of sparse porphyritic olivine chondrules set in a recrystallized matrix of olivine, plagioclase, high-Ca pyroxene, Cr-Ti-bearing magnetite, and Fe-Ni sulfide. Nearly all sulfide and some silicate has been replaced by fine-grained oxides. Average chondrule size 0.73 ± 0.25 mm (n=17).

Geochemistry: (C. Herd and L. Tunney, UAb) Data obtained by EMP examination of carbon-coated thin section: Olivine Fa32.7±0.3 (FeO/MnO=117, mean NiO=0.57 wt%, n=21); high-Ca pyroxene Fs9.1±0.8Wo46.5±0.8 (FeO/MnO=65, n=3); plagioclase An38.9±7.6Or2.8±1.3 (range An28.6-50.1Or1.4-5.4, n=7). Chromite mean Cr #=0.61, TiO2 = 0.35 wt% (n=10).

Classification: CK6 chondrite

Specimens: Type specimen of 9.4 g, including one thin section, at UAb. M. Ouzillou 37.2 g.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P February 2018
Mass (g):47.0
Shock stage:low
Weathering grade:high
Fayalite (mol%):32.7±0.3 (n=21)
Ferrosilite (mol%):9.1±0.8 (n=3)
Wollastonite (mol%):46.5±0.8 (n=3)
Classifier:C. Herd and L. Tunney, UAb
Type spec mass (g):9.4
Type spec location:UAb
Main mass:M. Ouzillou
Comments:Field number MMO-2018-3Z; submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 2085 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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