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Northwest Africa 8168
Basic information Name: Northwest Africa 8168
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8168
Observed fall: No
Year found: 2012
Country: Mauritania
Mass:help 1200 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 20 Sep 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8168 (NWA 8168)

Mauritania

Find: 2012

Classification: Ureilite

History: Discovered by local people in the NW area of Mauritania in 2012, purchased in Nouadhibou in 2012 Oct.

Physical characteristics: (R. Bartoschewitz, Bart) One brown fragment of 1200 g. Saw cut shows brown close packed grains. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.48.

Petrography: (R. Bartoschewitz, Bart) Microprobe examination of a thin section shows olivine and pyroxene grains with triple junctions, grain size 0.5-6 mm. Grain boundaries occupied with graphite and metal. Graphite occurs as elongated areas up to 2 × 7 mm.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine: Fa21.0±2.0 (Fa14.7-22.1; Cr2O3=0.6-0.7 wt.%; Fe/Mn=44, n=15). Ca-poor pyroxene: Fs7.0 (n=1). Ca-rich pyroxene: Fs15En72Wo13 (n=26). Kamacite: Ni=5.0, Co=0.35, Si<0.3 wt.% (n=6).

Classification: Ureilite

Specimens: 21.9 g on deposit at Kiel, main mass Bart.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Nouadhibou
Date:2012
Mass (g):1200
Pieces:1
Class:Ureilite
Fayalite (mol%):21.0 (14.7-22.1, n=15)
Ferrosilite (mol%):7.1 (n=1)
Wollastonite (mol%):4.2
Magnetic suscept.:4.48
Classifier:R. Bartoschewitz
Type spec mass (g):21.9
Type spec location:Kiel
Main mass:Bart
Finder:anonymous
Comments:Submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Lehmweg 53, D-38518 Gifhorn, Germany; Website (private address; updated 4 Aug 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 103 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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