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Northwest Africa 7290
Basic information Name: Northwest Africa 7290
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7290
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 52.3 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 29 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7290 (NWA 7290)

(Northwest Africa)

Found: 2011

Classification: Ureilite

History: Discovered by local people inthe Erg Chech area in 2011, purchased in Agadir in 2012 Feb.

Physical characteristics: Two black to brown fragments with oriented fusion crust and a further 16 small fragments, totalling 52.3 g. Saw-cut surface shows brown patches in dark matrix. Magnetic susceptibility log χ = 4.35.

Petrography: Thin section displays olivine and pyroxene crystallites with triple junctions, grain size 0.5-5 mm. Grain boundaries occupied with graphite and metal.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine: Fa21.2-22.8; mean 22.2; σ=0.48; Cr2O3=0.7-0.8 wt.%; Fe/Mn=45, σ=6.3 (n=16). Ca-pyroxene: Fs18.6En73.6Wo7.8 (n=3). Kamacite: Ni=3.3, Co=0.45, Si=0-6.2 wt.% (n=3).

Classification: Ureilite

Specimens: 10.5 g on deposit at Kiel, main mass Bart.

Data from:
  MB102
  Table 0
  Line 0:
Origin or pseudonym:Erg-Chech
Place of purchase:Agadir
Date:2011
Mass (g):52.3
Pieces:18
Class:Ureilite
Fayalite (mol%):22.2 (21.2-22.8, n=16)
Magnetic suscept.:4.35
Classifier:Bart
Type spec mass (g):10.5
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. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7009 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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