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Northwest Africa 12879
Basic information Name: Northwest Africa 12879
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12879
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 11 g
Classification
  history:
Recommended:  Angrite    [explanation]

This is 1 of 33 approved meteorites classified as Angrite.   [show all]
Search for other: Achondrites, Angrites
Comments: Approved 6 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12879 (NWA 12879)

(Northwest Africa)

Purchased: 2019

Classification: Angrite

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

Physical characteristics: Many small dark brownish fragments without fusion crust.

Petrography: The meteorite exhibits a subophitic texture of lath-shaped up to 200 µm sized anorthite, Al-Ti-augite, and Ca-rich olivine. Pyroxene and olivine show strong compositional zoning, which in case of olivine can be reverse. Several olivine grains are overgrown by kirschsteinite. Minor phases include titanomagnetite, troilite, kuratite, and silicoapatite.

Geochemistry: olivine: Fa65.1±20.9Ln9.5±6.8 (Fa15.6-84.9Ln0.4-21.2, FeO/MnO=86±12, n=36); clinopyroxene: Fs33.2±12.1Wo51.9±0.9 (Fs19.9-49.5Wo49.9-53.1, FeO/MnO=110±26, TiO2 = 2.2±0.9 wt%, Al2O3 = 7.6±1.1 wt%, n=22); kirschsteinite: Fa60.1±1.8Ln36.1±1.4 (Fa57.7-63.4Ln33.1-38.0, FeO/MnO=70±4, n=11); anorthite: An99.6±0.2 (An99.1-99.8, n=11)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):11
Pieces:many
Class:Angrite
Shock stage:low
Weathering grade:low
Fayalite (mol%):65.1; 60.1
Ferrosilite (mol%):33.2
Wollastonite (mol%):51.9
Classifier:A. Greshake, MNB
Type spec mass (g):2.2
Type spec location:MNB
Main mass:Said Yousfi
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

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