Meteoritical Bulletin: Entry for Northwest Africa 14714

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Northwest Africa 14714

Basic information

Name: Northwest Africa 14714
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14714
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 4 kg

Classification
history:

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

This is 1 of 322 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 19 Mar 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 14714 (NWA 14714)

(Northwest Africa)

Purchased: 2021

Classification: Martian meteorite (Shergottite)

History: Purchased January, 2021 by Mark Lyon from a Northwest African dealer

Physical characteristics: Four identical appearing stones with desert weathered exteriors. Saw cut reveals a medium grained cumulate with light and dark crystals, with the darker crystals coinciding with areas that appear to be shock darkened. Numerous black shock melt pockets are present.

Petrography: (A. Ross, UNM; D. Dickens, NMMS; C. Agee, UNM) Examination of a polished microprobe mount shows ~50% igneous-zoned subcalcic augite and ~45% maskelynite, with ubiquitous Ti-magnetite, ilmenite, merrillite, and troilite making up the remainder. Shock melt was observed.

Geochemistry: (A. Ross, UNM) Pigeonite Fs_49.4±1.9Wo_13.5±1.4, Fe/Mn=35±2, n=10; augite Fs_28.0±5.6Wo_32.7±1.4, Fe/Mn=31±3, n=10; plagioclase An_53.6±0.7Ab_45.4±0.8, Or 1.0±0.1, n=6.

Classification: Martian basaltic shergottite

Specimens: 21.42 g including a probe mount on deposit at UNM, Mark Lyon holds the main mass.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021
Mass (g):	4 kg
Pieces:	4
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	moderate
Ferrosilite (mol%):	49.4±1.9, 28.0±5.6
Wollastonite (mol%):	13.5±1.4, 32.7±1.4
Classifier:	C. Agee, UNM; D. Dickens, NMMS
Type spec mass (g):	21.42 g
Type spec location:	UNM
Main mass:	Mark Lyon
Comments:	Field Name ML-15; submitted by D. Dickens

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

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 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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