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Northwest Africa 7487
Basic information Name: Northwest Africa 7487
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7487
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 405 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  H4
Recommended:  H4    [explanation]

This is 1 of 6350 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 12 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7487 (NWA 7487)

Morocco

Purchased: May 2012

Classification: Ordinary chondrite (H4)

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

Physical characteristics: Single stone, dark brown exterior, saw cut reveals numerous chondrules, some up to 3 mm, set in a reddish brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a numerous PO, POP, and some BO chondrules in a fine-grained matrix, some chondrules with mesostasis and some with plagioclase.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa18.0±0.2, Fe/Mn=38±2, n=21; low-Ca pyroxene Fs15.3±1.3Wo1.0±0.8 Fe/Mn=22±3, n=20; most kamacite is oxidized.

Classification: Ordinary chondrite (H4), weathering grade W3.

Specimens: 21.5 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):404.61
Pieces:1
Class:H4
Weathering grade:W3
Fayalite (mol%):18.0±0.2
Ferrosilite (mol%):15.3±1.3
Wollastonite (mol%):1.0±0.8
Classifier:C. Agee, UNM
Type spec mass (g):21.5
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 1852 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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