header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 26 Oct 2021
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 12498
Basic information Name: Northwest Africa 12498
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12498
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 167.6 g
Classification
  history:
Recommended:  L6    [explanation]

This is 1 of 11692 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 12498 (NWA 12498)

(Northwest Africa)

Purchased: 2018

Classification: Ordinary chondrite (L6)

History: Purchased at Hamburg Mineral Show Dec. 2018.

Physical characteristics: 167.6 g dark brown stone with metallic specks on the surface

Petrography: (R. Bartoschewitz, Bart) fractured and blackened matrix with no recognizable chondrules, feldspar >100 µm.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa24.7±1.0 (n=26); low-Ca pyroxene Fs21.2±0.6Wo1.7±0.1 (n=3); Ca pyroxene En47Fs7Wo46 (n=1); chromite CRAL=86, FFM=86-92 (n=6); merrillite. Kamacite Ni=6.5-6.9 wt%, Co=1.0-1.2 wt% (n=2). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 5.06

Classification: Ordinary chondrite (L6, S4, W0), based on texture, Wo content of pyroxenes, plagioclase size, and absence of chondrules

Specimens: 21.0 g at Kiel, Bart holds the main mass.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Hamburg
Date:P 2018
Mass (g):167.6
Pieces:1
Class:L6
Shock stage:S4
Weathering grade:W0
Fayalite (mol%):24.7±1.0 (n=26)
Ferrosilite (mol%):21.2±0.6 (n=3)
Wollastonite (mol%):1.7±0.1
Magnetic suscept.:5.06
Classifier:R. Bartoschewitz
Type spec mass (g):21.0
Type spec location:Kiel
Main mass:Bart
Finder:anonymous
Comments:NWA-RB11; 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. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

Direct link to this page