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Northwest Africa 7504
Basic information Name: Northwest Africa 7504
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7504
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 1680 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L6
Recommended:  L6    [explanation]

This is 1 of 12583 approved meteorites (plus 8 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Jan 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7504 (NWA 7504)

(Northwest Africa)

Purchased: 2012 Feb

Classification: Ordinary chondrite (L6)

History: Purchased by Matthew Matthew in February 2012 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: Mostly recrystallized with very sparse, medium-sized chondrules. Olivine, orthopyroxene, clinopyroxene, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (Fa25.0-25.6), orthopyroxene (Fs20.7-21.1Wo1.6-1.4), clinopyroxene (Fs7.0-8.6Wo45.9-44.0).

Classification: Ordinary chondrite (L6).

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2012 Feb
Mass (g):1680
Pieces:2
Class:L6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):25.0-25.6
Ferrosilite (mol%):20.7-21.1
Wollastonite (mol%):1.6-1.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.6
Type spec location:UWB
Main mass:MMartin
Comments:MM12-2; 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)
MMartin: P.O. Box 164, Kaaawa, HI 96730, United States; Website (private address; updated 14 Jul 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ryan Upchurch   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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