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Northwest Africa 7188
Basic information Name: Northwest Africa 7188
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7188
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 455 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7188 (NWA 7188)

(Northwest Africa)

Purchased: 2011 Sep

Classification: HED achondrite (Eucrite)

History: Purchased by Twelker in 2011 September from a Moroccan dealer at the Denver Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh unbrecciated specimen with intersertal texture composed of exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite and troilite.

Geochemistry: Clinopyroxene lamellae (Fs30.0-31.3Wo39.6-39.1, FeO/MnO = 32) in host low-Ca pyroxene (Fs57.1-57.9Wo6.5-8.0, FeO/MnO = 33-35).

Classification: Basaltic eucrite (unbrecciated).

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2011 Sep
Mass (g):455
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):30.0-31.3; 57.1-57.9
Wollastonite (mol%):39.6-39.1; 6.5-8.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22
Type spec location:UWB
Main mass:E. Twelker
Comments:ET11-2; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
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)
Also see:
  This lists the most popular meteorites among people who looked up this meteorite.
Revision
  history:
  This lists important revisions made to data for this record.

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