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Northwest Africa 7494
Basic information Name: Northwest Africa 7494
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7494
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 3.55 kg
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  H6
Recommended:  H6    [explanation]

This is 1 of 6105 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7494 (NWA 7494)

Morocco

Purchased: Sept. 11, 2012

Classification: Ordinary chondrite (H6)

History: Purchased by Reed in Denver, September 11, 2012.

Physical characteristics: Single stone, dark weathered exterior, saw cut reveals very fine-grained metal and sulfide, and faint chondrules, set in a dark gray matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows an equilibrated chondrite texture with a few indistinct chondrules and plagioclase up to 200 microns. Abundant kamacite and troilite, metal is moderately oxidized.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa19.0±0.4, Fe/Mn=38±1, n=4; low-Ca pyroxene Fs16.7±0.1Wo1.4±0.2, Fe/Mn=22±1.

Classification: Ordinary chondrite (H6), weathering grade W2.

Specimens: 29.7 g including a probe mount on deposit at UNM, Reed holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Denver
Date:P Sept. 11, 2012
Mass (g):3553
Pieces:1
Class:H6
Weathering grade:W2
Fayalite (mol%):19.0±0.4
Ferrosilite (mol%):16.7±0.1
Wollastonite (mol%):1.4±0.2
Classifier:C. Agee, UNM
Type spec mass (g):29.7
Type spec location:UNM
Main mass:Reed
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)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
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 1481 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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