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Northwest Africa 13473
Basic information Name: Northwest Africa 13473
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13473
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 84 g
Classification
  history:
Recommended:  H4    [explanation]

This is 1 of 6033 approved meteorites (plus 11 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 2 Nov 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13473 (NWA 13473)

(Northwest Africa)

Purchased: 2018 Dec

Classification: Ordinary chondrite (H4)

History: Purchased by Mbark Arjdal in December 2018 from a delaer in Timbuktu, Mali.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, relatively small equilibrated chondrules are set in a relatively coarse grained, recrystallized matrix containing kamacite (extensively altered to Fe hydroxides), merrillite and troilite (partially altered).

Geochemistry: Olivine (Fa19.0±0.2, range Fa18.7-19.1, N = 5), low-Ca pyroxene (Fs16.6±0.2Wo1.6±1.3, range Fs16.4-16.6Wo1.0-3.9, N = 5), clinopyroxene (Fs7.8±0.6Wo37.8±2.6, range Fs7.3-8.5Wo35.2-40.3, N = 3).

Classification: Ordinary chondrite (H4).

Specimens: 17.5 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Timbuktu, Mali
Date:P 2018 Dec
Mass (g):84
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):19.0±0.2
Ferrosilite (mol%):16.6±0.2
Wollastonite (mol%):1.6±1.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):17.5
Type spec location:UWB
Main mass:M. Arjdal
Comments:Arj ZM137; 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 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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