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Northwest Africa 13429
Basic information Name: Northwest Africa 13429
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13429
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 2.02 kg
Classification
  history:
Recommended:  L7    [explanation]

This is 1 of 27 approved meteorites classified as L7.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Sep 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13429 (NWA 13429)

(Northwest Africa)

Purchased: 2020 Jun

Classification: Ordinary chondrite (L7)

History: Purchased by Didi Baidari in July 2020 from a dealer in Nouakchott, Mauritania.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Metamorphic granoblastic texture. Aggregate of olivine, orthopyroxene, crystalline albitic plagioclase, augite, chromite, troilite and altered kamacite. No chondrules were observed. Some cross-cutting thin, very fine grained shock veinlets (purplish gray in thin section) are present.

Geochemistry: Olivine (Fa25.6±0.8, range Fa24.3-26.8, N = 6), low-Ca pyroxene (Fs21.6±0.9Wo3.4±1.0, range Fs20.8-22.2Wo2.8-5.1, N = 5), augite (Fs12.5±0.6Wo36.5±1.9, range Fs12.1-13.2Wo38.3-34.5, N = 3).

Classification: Ordinary chondrite (L7).

Specimens: 61.6 g including one polished thin section at UWB; remainder with Mr. D. Baideri.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2020 Jun
Mass (g):2020
Pieces:5
Class:L7
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):25.6±0.8
Ferrosilite (mol%):21.6±0.9
Wollastonite (mol%):3.4±1.0
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):61.6
Type spec location:UWB
Main mass:D. Baidari
Comments:Work name IA-2; 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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Wang Ziyao                  
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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