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Northwest Africa 14713
Basic information Name: Northwest Africa 14713
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14713
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 3 kg
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 298 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14713 (NWA 14713)

(Northwest Africa)

Purchased: 2021

Classification: Martian meteorite (Shergottite)

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

Physical characteristics: Three identical appearing stones with green-black mottled exterior, saw cuts reveals a coarse cumulate interior dominated by light and dark colored crystals.

Petrography: (A. Ross, UNM; D. Dickens, NMMS; C. Agee, UNM) Examination of a polished microprobe mount and image analysis using ImageJ shows ~25% igneous-zoned olivine, ~35% igneous-zoned pyroxene and ~35% maskelynite, with opaques making up the remainder. Chromite, ilmenite, merrillite, and troilite were detected.

Geochemistry: (A. Ross, UNM) Olivine Fa35.4±2.8 Fe/Mn=49±3, n=10; Pigeonite Fs25.7±3.2Wo9.2±2.4, Fe/Mn=29±2, n=8; augite Fs16.5±1.0Wo34.6±1.3, Fe/Mn=26±3, n=3; plagioclase An54.8±1.2Ab43.9±1.2, Or 1.3±0.2, n=5.

Classification: Martian lherzolitic shergottite

Specimens: 20 g including a probe mount on deposit at UNM, Mark Lyon holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):3 kg
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):35.4±2.8
Ferrosilite (mol%):25.7±3.2,16.5±1.0
Wollastonite (mol%):9.2±2.4,34.6±1.3
Classifier:C. Agee, UNM; D. Dickens, NMMS
Type spec mass (g):20 g
Type spec location:UNM
Main mass:Mark Lyon
Comments:Field Name ML-14; submitted by D. Dickens
   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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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