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Northwest Africa 7543
Basic information Name: Northwest Africa 7543
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7543
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 137 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 344 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 14 Nov 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7543 (NWA 7543)

Northwest Africa

Purchased: 2012 Jun 21

Classification: HED achondrite (Eucrite, polymict)

Petrography: (K. Metzler, IfP) Polymict breccia consisting of eucritic lithic clasts up to 2.5 cm with subophitic to granulitic textures and mineral fragments (pyroxene, plagioclase) set in a fine-grained, light gray matrix. Less than 10 vol% diogenitic low-Ca pyroxene fragments occur. Some dark melt rock clasts are observed. Most pyroxenes exhibit augite exsolution lamellae, but fragments of unequilibrated pyroxene can also be found. Accessories are silica, ilmenite, chromite, troilite and low-Ni metal.

Geochemistry: Plagioclase compositions: An 88.3±5.1 (An82-97; n=13). Diogenitic pyroxene fragment: En71Fs26Wo3

Classification: Polymict eucrite

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Sainte-Marie, France
Date:P 2012 Jun 21
Mass (g):137
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):49.0±11.6 (29-62; n=24)
Wollastonite (mol%):15.7±13.4 (2-42); 3
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Anonymous
Comments:Submitted by K. Metzler
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

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