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 6913
Basic information Name: Northwest Africa 6913
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6913
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 36 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Eucrite-pmict
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 29 Nov 2011
Writeuphelp
Writeup from MB 100:

Northwest Africa 6913 (NWA 6913)

Northwest Africa

Purchased: Feb 2011

Classification: HED achondrite (Eucrite, polymict)

Petrography: Fragmental breccia composed mostly of clasts and debris of various textural types of eucrites (cumulate, ophitic, granulitic, vitrophyric and very fine grained quenched). These lithologies are composed of low-Ca pyroxene, calcic plagioclase, silica polymorph, ilmenite, troilite and rare Ni-free metal. Rare components include a zoned olivine grain, a ferroan subcalcic augite grain, diogenitic orthopyroxene grains, and one finer grained breccia clast.

Geochemistry: Diogenitic orthopyroxene Fs22.2Wo3.3, FeO/MnO=30, pigeonite Fs56.9Wo7.2, FeO/MnO=31, subcalcic augite Fs60.5Wo26.9, FeO/MnO=34, olivine core Fa20.8, rim Fa38.4, FeO/MnO=41-60.

Data from:
  MB100
  Table 1
  Line 1533:
Place of purchase:Tucson
Date:P Feb 2011
Mass (g):35.96
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Fayalite (mol%):20.8
Ferrosilite (mol%):22.2; 56.9
Wollastonite (mol%):3.3; 7.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):7.2
Type spec location:UWS
Main mass:MMartin
Comments:MM11-3; 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)
MMartin: P.O. Box 164, Kaaawa, HI 96730, United States; Website (private address; updated 14 Jul 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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)
Andreas Grünemeyer   
Geography: 
Coordinates:Unknown.

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

Direct link to this page