header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 21 Sep 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 6948
Basic information Name: Northwest Africa 6948
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6948
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 56 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  L5-melt breccia¬†
Recommended:  L5-melt breccia    [explanation]

This is 1 of 18 approved meteorites classified as L5-melt breccia.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 3 Mar 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 6948 (NWA 6948)

(Northwest Africa)

Purchased: May 2011

Classification: Ordinary chondrite (L5, melt breccia)

Physical characteristics: Cut surface shows lenticular regions of L5 material interleaved with zones of fine grained shock-darkened and melt-textured material. There appears to have been flow of the latter around the clasts.

Petrography: Specimen consists of regions with sparse chondrules surrounded by very fine-grained regions lacking chondrules (apparently representing quenched melt and/or highly shocked domains). The mafic minerals have variable compositions.

Geochemistry: Olivine (Fa22.7-24.2), orthopyroxene (Fs18.4-19.5Wo3.6-2.2; Fs12.0Wo2.1), subcalcic augite (Fs13.8Wo28.4; Fs16.0Wo25.6).

Data from:
  MB100
  Table 1
  Line 1549:
Place of purchase:Temara
Date:P May 2011
Mass (g):56
Pieces:1
Class:L5-melt breccia
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):22.7-24.2
Ferrosilite (mol%):18.4-19.5
Wollastonite (mol%):3.6-2.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):11.6
Type spec location:UWS
Main mass:Aaronson
Comments:Submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

Direct link to this page