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Northwest Africa 13034
Basic information Name: Northwest Africa 13034
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13034
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 958 g
Classification
  history:
Recommended:  Eucrite-br    [explanation]

This is 1 of 173 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 9 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13034 (NWA 13034)

(Northwest Africa)

Find: 2018 Aug

Classification: HED achondrite (Eucrite, brecciated)

History: Found by prospectors in the border region between Mauritania and Algeria in August 2018.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of fairly closely-packed eucrite clasts (of varied texture and grainsize) in a sparse matrix of related crystalline debris. Clast textures range from fine-intersertal to diabasic to gabbroic, but all have similar mineralogy, being composed predominantly of exsolved pigeonite (pale orange in thin section) and calcic plagioclase (exhibiting undulose extinction or polycrystalline) with accessory silica polymorph, ilmenite, aluminous Ti-chromite and minor secondary calcite.

Geochemistry: Orthopyroxene host (Fs60.7-63.6, FeO/MnO = 31-33, N = 5), clinopyroxene exsolution lamellae (Fs25.8-28.6Wo43.2-44.0, FeO/MnO = 31-34, N = 6), plagioclase (An86.8-88.0Or0.3-0.5, N = 3).

Classification: Eucrite (breccia, moderately shocked).

Specimens: 27 g including one polished thin section at UWB; remainder with anonymous finders.

Data from:
  MB109
  Table 0
  Line 0:
Date:2018 Aug
Mass (g):958
Pieces:1
Class:Eucrite-br
Shock stage:moderate
Weathering grade:low to m
Ferrosilite (mol%):60.7-63.6; 25.8-28.6
Wollastonite (mol%):1.9-3.8; 43.2-44.0
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):27
Type spec location:UWB
Main mass:Anonymous
Comments:Work name DL 1007; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7228 approved meteorites from (Northwest Africa) (plus 1998 unapproved names)

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