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Northwest Africa 7542
Basic information Name: Northwest Africa 7542
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7542
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 107 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 408 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 7542 (NWA 7542)

Northwest Africa

Purchased: 2012 Jun 21

Classification: HED achondrite (Eucrite, polymict)

Petrography: (K. Metzler, IfP) Polymict breccia consisting of a large variety of eucritic lithic clasts with sizes up to 3 cm and mineral fragments (plagioclase, pyroxene) set in a fine-grained, gray matrix. Lithic clasts with ophitic and subophitic textures are observed. Most pyroxenes exhibit augite exsolution lamellae. Dark melt rock clasts occur. Accessories are silica, ilmenite, chromite, troilite, and Ni-poor metal. Contains angular carbonaceous chondrite clasts up to 1.5 mm.

Geochemistry: An 89.4±5.1 (An83-98; n=10)

Classification: Polymict eucrite

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Sainte-Marie, France
Date:P 2012 Jun 21
Mass (g):107
Pieces:1
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):39.6±14.8 (22-64; n=25)
Wollastonite (mol%):5.0±7.7 (2-34)
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
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