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Northwest Africa 7477
Basic information Name: Northwest Africa 7477
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7477
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 616 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  L3.9
Recommended:  L3.9    [explanation]

This is 1 of 29 approved meteorites classified as L3.9.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 23 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7477 (NWA 7477)

Morocco

Purchased: May 2012

Classification: Ordinary chondrite (L3.9)

History: Purchased by Sean Tutorow in Morocco, May 2012.

Physical characteristics: One stone, saw cut reveals dark matrix, fine-grained metal and veining, and chondrules.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous PO, POP, and BO chondrules with mesostasis. Scattered, fine-grained, oxidized kamacite and iron-oxide weathering veins throughout. Accessory augite and pentlandite, no plagioclase present.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa24.0±2.6, Fe/Mn=49±7, n=21; low-Ca pyroxene Fs18.4±4.8Wo1.0±0.3, Fe/Mn=31±18, n=14.

Classification: Ordinary chondrite (L3.9), weathering grade W3.

Specimens: 23.39 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P May 2012
Mass (g):616.18
Pieces:1
Class:L3.9
Weathering grade:W3
Fayalite (mol%):24.0±2.6
Ferrosilite (mol%):18.4±4.8
Wollastonite (mol%):1.0±0.3
Classifier:C. Agee, UNM
Type spec mass (g):23.39
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, 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)
Michael Szczepanski   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1394 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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