header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 20 Oct 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 6723
Basic information Name: Northwest Africa 6723
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6723
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 141.8 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 374 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 31 Jan 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 6723 (NWA 6723)

(Northwest Africa)

Purchased: Feb 2011

Classification: HED achondrite (Howardite)

Petrography: Relatively fresh fragmental breccia composed mostly of basaltic eucritic clasts and related debris with ~15 vol.% diogenitic orthopyroxene; one quenched eucrite clast was noted. Eucritic minerals include orthopyroxene, subcalcic augite, calcic plagioclase, ilmenite, chromite, Ni-free metal, troilite, silica polymorph and rare zircon (associated with ilmenite). Metal in the matrix and within some basaltic eucrite clasts exhibits minor hydroxide staining from terrestrial weathering.

Geochemistry: Diogenitic orthopyroxene Fs31.2Wo5.0; Fe/Mn=27), orthopyroxene Fs57.9Wo4.2 (Fe/Mn=30), subcalcic augite Fs37.3-45.9Wo29.2-27.3 (Fe/Mn=27-30).

Data from:
  MB100
  Table 1
  Line 1497:
Place of purchase:Marrakech
Date:P Feb 2011
Mass (g):141.8
Pieces:3
Class:Howardite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):57.9; 37.3-45.9
Wollastonite (mol%):4.2; 29.2-27.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.7
Type spec location:UWS
Main mass:B. Booz
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)
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)
Beat Booz            
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

Direct link to this page