header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 7 Jul 2020
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
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 35 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; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Said Yousfi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

Direct link to this page