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Northwest Africa 6694
Basic information Name: Northwest Africa 6694
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6694
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 5.01 kg
Classification
  history:
Meteoritical Bulletin:  MB 99  (2011)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 425 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Apr 2011
Writeuphelp
Writeup from MB 99:

Northwest Africa 6694 (NWA 6694)

Morocco

Found: 2009

Classification: HED achondrite (Eucrite, polymict)

Petrography: Contains conspicuous dark, angular, fine-grained clasts up to 3 cm across. Its constituent grains within both the groundmass and the dark clasts are finely granulated. In the groundmass, outlines of former relatively coarse crystals are typically still discernible.

Geochemistry: Low-Ca pyroxenes FeO/MnO = 29, n = 8. Plagioclase An87-92, n = 8. Within the groundmass, the low-Ca pyroxenes mostly have Mg clustered at 50-51 mol% (5 of 6 analyses; the other has Mg of 44 mol%), but in one of the large dark clasts the low-Ca pyroxenes (2 analyses) have Mg of 57-58 mol%.

Classification: Achondrite (polymict eucrite).

Data from:
  MB99
  Table 0
  Line 0:
Origin or pseudonym:Mhlamid
Place of purchase:Tucson
Date:2009
Mass (g):5005
Pieces:1
Class:Eucrite-pmict
Shock stage:S4
Weathering grade:W1
Ferrosilite (mol%):40-52 (low-ca px, 8 analyses)
Wollastonite (mol%):4-8 (low-ca px, 8 analyses)
Classifier:Paul Warren
Type spec mass (g):68.4
Type spec location:UCLA
Main mass:Edwin Thompson
Comments:Submitted by Warren
Institutions
   and collections		 UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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