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Northwest Africa 7023
Basic information Name: Northwest Africa 7023
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7023
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 473 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 339 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Apr 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7023 (NWA 7023)

(Northwest Africa)

Purchased: 2003

Classification: HED achondrite (Eucrite, polymict)

Petrography: (A. Love, App) Breccia consisting of 2.4-6.0 mm angular to subrounded clasts of dominant (~22 vol.%) fine- to medium-grained cumulate-textured eucrite, subordinate (~7%) fine-grained variolitic-textured eucrite, granulated and glassy breccia clasts, and vitrophyric clasts set within a finer grained fragmental matrix of plagioclase, augite, pigeonite, orthopyroxene, ilmenite and troilite.

Geochemistry: (A. Irving and S. Kuehner, UWS) Unexsolved pigeonite (core Fs38.4Wo7.3, rim Fs53.9Wo6.1, Fe/Mn=28-31). Exsolved pigeonite consists of host orthopyroxene (Fs47.7-55.1Wo5.6-4.8, Fe/Mn=27-29), with exsolution lamellae of clinopyroxene (Fs23.0-26.8Wo39.8-41.5, Fe/Mn=27-28).

Data from:
  MB100
  Table 1
  Line 1580:
Place of purchase:Morocco
Date:P 2003
Mass (g):473
Pieces:2
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):38.4; 47.7-55.1; 23.0-26.8.
Wollastonite (mol%):7.3; 5.6-4.8; 39.8-41
Classifier:A. Love, App; A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:App; UWS
Main mass:G. Catterton
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)
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Matthew Martin   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6752 approved meteorites from (Northwest Africa) (plus 2052 unapproved names)

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