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Northwest Africa 15876
Basic information Name: Northwest Africa 15876
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15876
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 339 g
Meteoritical Bulletin:  MB 112  (2023)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 318 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 23 Apr 2023
Writeup from MB 112:

Northwest Africa 15876 (NWA 15876)

(Northwest Africa)

Purchased: 2023

Classification: Martian meteorite (Shergottite)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Grayish to dark greenish fragments with patches of black fusion crust.

Petrography: The meteorite shows a poikilitic texture of up to 3 mm sized pyroxenes enclosing rounded to subrounded olivines that frequently contain trapped melt inclusions. Feldspar is a minor component and has completely been transformed to maskelynite. Accessory minerals include chomite, FeS and FeNiS. Contains glassy to finely recrystallized shock melt pocket.

Geochemistry: olivine: Fa27.8±0.7 (Fa26.8-28.4, FeO/MnO=44±1, n=10); orthopyroxene: Fs18.7±0.3Wo2.4±0.1 (Fs18.3-19.5Wo2.3-2.6, FeO/MnO=27±2, n=10); pigeonite: Fs24.6±1.5Wo10.6±2.3 (Fs20.4-26.6Wo7.1-13.7, FeO/MnO=26±1, n=10); maskelynite (An53.2-56.3Ab42.4-45.4Or1.3-1.5, n=10)

Classification: Martian meteorite (shergottite); likely paired with NWA 10961

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2023
Mass (g):339
Class:Martian (shergottite)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):27.8
Ferrosilite (mol%):18.7; 24.6
Wollastonite (mol%):2.4; 10.6
Classifier:A. Greshake, MNB
Type spec mass (g):20.1
Type spec location:MNB
Main mass:Polandmet - Marcin Cimala
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Polandmet: targoniny 30 43445 Dziegielow Poland, Poland; Website (institutional address; updated 7 May 2021)
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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     This is 1 of 9570 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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