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Northwest Africa 6939
Basic information Name: Northwest Africa 6939
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6939
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 39 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 23 Jun 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 6939 (NWA 6939)

(Northwest Africa)

Purchased: 2011 Jun 17

Classification: Ureilite

Petrography: Coarse-grained ultramafic rock consisting of olivine and pyroxene crystals up to 5 mm. Subtle alignment of grains is visible. Reverse zoning of olivine grains with Mg-rich zones at the margins and along cracks. Metal is concentrated along grain boundaries and mostly oxidized by terrestrial weathering.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Ensisheim
Date:P 2011 Jun 17
Mass (g):39
Pieces:1
Class:Ureilite
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):17.9±10.1 (2-26; n=14)
Ferrosilite (mol%):21.0±3.0 (15-23; n=6)
Classifier:K. Metzler, IfP
Type spec mass (g):8
Type spec location:IfP
Main mass:Anonymous
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

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

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