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Northwest Africa 14673
Basic information Name: Northwest Africa 14673
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14673
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 405 g
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 19 Feb 2022
Writeup from MB 111:

Northwest Africa 14673 (NWA 14673)

(Northwest Africa)

Purchased: November 2017

Classification: Martian meteorite (Shergottite)

Physical characteristics: The stone has a granular, sugary texture 60% covered by a fresh fusion crust.

Petrography: R. Hewins, S. Pont, MNHNP. This is a poikilitic shergottite with 50% anhedral olivine (~1 mm ), 26% poikilitic pigeonite (up to 4 mm), 5% chromite (s.l., up to 500 microns), and minor augite. Maskelynite (18%) is generally interstitial though small plagioclase laths were enclosed ophitically by pyroxene. Chromite (up to 400 µm) and Cr-Ti spinel are enclosed by pyroxene and maskelynite. Minor minerals include ilmenite, pyrrhotite and baddelyite. A few shock veins are seen in the hand specimen.

Geochemistry: Mineral compositions and Geochemistry: Olivine is Fo66.0 (SD 0.8) and FeO/MnO 49.9, by coincidence very close to Chassigny olivine in composition. Pigeonite is En63Fs27Wo10 and augite En50Fs17Wo32. Maskelynite is An59-68. The spinels are chromite with composition Chr82-70,Usp2-4 and Cr-Ti spinel with Chr58-34,Usp30-43.

Classification: Martian (shergottite, poikilitic)

Specimens: Specimen: A single stone of 405 g with poikiliitic texture seen in microscope.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P November 2017
Mass (g):405
Pieces:Single stone
Class:Martian (shergottite)
Fayalite (mol%):34
Ferrosilite (mol%):27; 18
Wollastonite (mol%):10; 32
Classifier:R. Hewins, MNHNP
Type spec mass (g):20
Type spec location:MNHNP
Main mass:Luc Labenne
Comments:Temporary name LM AT; submitted by R. Hewins
   and collections
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
USP: Museu de Geociências - USP Rua do Lago, 562 CEP: 05508-080 Butantã - SP Brazil, Brazil; Website (institutional address; updated 22 Oct 2022)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 9344 approved meteorites from (Northwest Africa) (plus 1872 unapproved names)

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