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Northwest Africa 14107
Basic information Name: Northwest Africa 14107
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14107
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 43.2 g
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 24 Jul 2021
Writeup from MB 110:

Northwest Africa 14107 (NWA 14107)

(Northwest Africa)

Purchased: 2021

Classification: Martian meteorite (Shergottite)

History: Purchased from a north African meteorite dealer in 2021.

Physical characteristics: Single stone with no fusion crust, the exterior surface has olivine phenocrysts as dark colored high relief grains set in light brown groundmass. Freshly broken surface on the deposit sample reveals a porphyritic texture with dark gray olivine phenocrysts set in a light gray groundmass. Small shiny maskelynite grains are macroscopically visible.

Petrography: (A. Ross and C. Agee, UNM) This meteorite has the approximate modal abundances: 55% pigeonite, 20% olivine, 10% maskelynite, with accessory ilmenite, chromite, and troilite. Pyroxenes are compositionally homogeneous pigeonite. Olivine phenocrysts are also homogeneous and typically 1-2 mm in size. Pyroxene grains are often finer-grained adcumulate textures. Maskelynite is usually observed occupying pyroxene and olivine grain boundary pockets.

Geochemistry: (A. Ross, UNM) Olivine Fa35.3±1.5, Fe/Mn=53±2, CaO=0.27±0.06, (wt%), n=10; pyroxene Fs25.7±2.2Wo9.0±1.0, Fe/Mn=30±2, n=20; maskelynite An61.4±1.4Ab38.0±1.4Or0.7±0.1, n=6.

Classification: Martian shergottite (olivine phyric basalt).

Specimens: 8.65 g on deposit at UNM, Brett Joseph Cohen holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021
Mass (g):43.2
Class:Martian (shergottite)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):35.3±1.5
Ferrosilite (mol%):25.7±2.2
Wollastonite (mol%):9.0±1.0
Classifier:C. Agee, UNM
Type spec mass (g):8.65
Type spec location:UNM
Main mass:Brett Cohen
Comments:Submitted by C. Agee
   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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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