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Northwest Africa 7223
Basic information Name: Northwest Africa 7223
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7223
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 40 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 348 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 Dec 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7223 (NWA 7223)

(Northwest Africa)

Purchased: 2011

Classification: HED achondrite (Eucrite, polymict)

Petrography: The meteorite is partly covered with black fusion crust and shows a light greyish interior, with abundant whitish plagioclase grains. It shows a typical basaltic texture with exsolved pyroxene and often lath-shaped plagioclase. Rarely lithic clasts of differently textured basaltic lithologies and dark melt clast are encountered. Minor phases include chromite, SiO2, and FeNi metal. Contains ~3% diogenitic material.

Geochemistry: Ca-poor pyroxene: Fs59.1-65.1Wo1.5-9.7, FeO/MnO=30-34; Ca-rich pyroxene: Fs27.7-33.9Wo40.6-42.7, FeO/MnO=29-37; calcic plagioclase: An89 (range An85.3-90).

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Ensisheim, France
Date:P 2011
Mass (g):40
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.1-65.1; 27.7-33.9
Wollastonite (mol%):1.5-9.7; 40.6-42.7
Classifier:A. Greshake, MNB
Type spec mass (g):12.6
Type spec location:MNB
Main mass:Harald Stehlik
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Stehlik: Harald Stehlik, 1220 Wien, Austria (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7377 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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