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Northwest Africa 12919
Basic information Name: Northwest Africa 12919
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12919
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 7.5 g
Meteoritical Bulletin:  MB 108  (2020)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 7 Nov 2019
Writeup from MB 108:

Northwest Africa 12919 (NWA 12919)


Purchased: June 2019

Classification: Martian meteorite (Shergottite)

History: Purchased in July 2019 from Abdellah Afiniss via the internet.

Physical characteristics: The main mass is a 7.5 g irregular, ellipsoidal, green-gray stone with no fusion crust.

Petrography: (C. Herd and A. Sheen, UAb) Medium-grained basaltic assemblage of pyroxene (~60 vol.%) and maskelynite (~30 vol.%), plus minor titanomagnetite, ilmenite, merrillite, chlorapatite, and Fe-sulfides, and trace olivine, glassy mesostasis, and baddeleyite. Pyroxene grains range between 200 µm to 800 µm in length and consist of augite cores with pigeonite rims. Maskelynite grains are up to 1.2 mm in length.

Geochemistry: (C. Herd and A. Sheen, UAb) Pyroxene displays two distinct compositional trends: pigeonite (Fs45En41Wo13-Fs72En15Wo13, average Fs63En23Wo14, FeO/MnO=37; n=85) and augite (Fs26En33Wo40-Fs54En17Wo29, average Fs38En29Wo33, FeO/MnO=32; n=83). Pigeonite adjacent to late-stage melt pockets has Fe-rich compositions reaching Fs76En10Wo14. Maskelynite is Ab43-57An40-56Or1-4 (n=21). Olivine grains (n=3) are highly fayalitic (Fa88-93; FeO/MnO=58-65) and associated with mesostasis.

Classification: Martian (shergottite)

Specimens: Entire specimen of 7.5 g, including one thin section, at UAb.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P June 2019
Mass (g):7.5
Class:Martian (shergottite)
Shock stage:moderate
Weathering grade:low
Classifier:C. Herd and A. Sheen, UAb
Type spec mass (g):7.5
Type spec location:UAb
Main mass:UAb
Comments:Submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 1992 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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