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Northwest Africa 7478
Basic information Name: Northwest Africa 7478
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7478
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 136.4 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2788 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 4 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7478 (NWA 7478)

Morocco

Purchased: May 2012

Classification: Ordinary chondrite (LL6)

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

Physical characteristics: One complete stone, saw cut reveals a reddish matrix with a few indistinct chondrules.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows relict and equilibrated chondrules. Abundant chromite and oxidized kamacite, ubiquitous troilite, and minor taenite.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa31.0±0.0, Fe/Mn=65±1, n=3; low-Ca pyroxene Fs25.3±0.1Wo1.9±0.4, Fe/Mn=38±2, n=3.

Classification: Ordinary chondrite (LL6), weathering grade W2.

Specimens: 22.0 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):136.35
Pieces:1
Class:LL6
Weathering grade:W2
Fayalite (mol%):31.0±0.0
Ferrosilite (mol%):25.3±0.1
Wollastonite (mol%):1.9±0.4
Classifier:C. Agee, UNM
Type spec mass (g):22.0
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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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1466 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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