header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 30 Nov 2019
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:
Limit to approved meteorite names
Search text:  
Northwest Africa 12494
Basic information Name: Northwest Africa 12494
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12494
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 160 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 342 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 21 Sep 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12494 (NWA 12494)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite, polymict)

History: Purchased at Hamburg Mineral Show Dec. 2018.

Physical characteristics: 160.0 g irregular fragment with cm-sized light irregular patches in a dark gray-green matrix

Petrography: (R. Bartoschewitz, Bart) microgabbroic and basaltic clasts are set in a cumulate basaltic brecciates matrix. Matrix feldspar is partly transformed to maskelynite.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Pyroxene Fs64.9±0.4Wo2.2±0.4 (n=5), Fe/Mn=30; pigeonite En32Fs60Wo8 (n=1); augite En27-31Fs49-28Wo20-44 (n=8); feldspar An83Or<1 (n=13); ilmenite; SiO2. Kamacite Ni=1.3-7.6, Co=0.8 (n=3); taenite Ni=42.2, Co=0.2 (n=1) (all wt-%). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.17

Classification: Achondrite (polymict eucrite)

Specimens: 20.0 g on deposit at Kiel, Bart holds the main mass.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Hamburg
Date:P 2018
Mass (g):160.0
Pieces:1
Class:Eucrite-pmict
Ferrosilite (mol%):64.9±0.4 (n=5)
Wollastonite (mol%):2.2±0.4
Magnetic suscept.:3.17
Classifier:R. Bartoschewitz
Type spec mass (g):20.0
Type spec location:Kiel
Main mass:Bart
Finder:anonymous
Comments:NWA-RB05; submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

Direct link to this page