Meteoritical Bulletin: Entry for Northwest Africa 14673

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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: 405 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 330 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 19 Feb 2022

Writeup

help

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 Fo_66.0(SD 0.8) and FeO/MnO 49.9, by coincidence very close to Chassigny olivine in composition. Pigeonite is En₆₃Fs₂₇Wo₁₀and augite En₅₀Fs₁₇Wo_32.Maskelynite is An_59-68.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:
  MB111
  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

Institutions
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 16 Feb 2024)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)

Catalogs:

References:

Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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