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Northwest Africa 7548
Basic information Name: Northwest Africa 7548
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7548
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 1300 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  L4
Recommended:  L4    [explanation]

This is 1 of 1646 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 21 Nov 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7548 (NWA 7548)

Morocco

Purchased: Aug 2012

Classification: Ordinary chondrite (L4)

History: Purchased by Adam Bates from a Moroccan meteorite dealer, August 2012.

Physical characteristics: Single stone, brown weathered surface, saw-cut reveals fine-grained metal/sulfide, many small chondrules, but some up to 2 mm.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated BO, POP, PO chondrules, most with mesostasis, some chondrules mantled with metal or sulfide. Ubiquitous troilite, kamacite, and taenite; metal has <5% oxidation; minor high-Ca pyroxene.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa25.7±0.3, Fe/Mn=54±3, n=28; low-Ca pyroxene Fs19.7±3.3Wo0.7±0.6, Fe/Mn=34±7, n=27.

Classification: Ordinary chondrite (L4), weathering grade W1.

Specimens: 24 g including a probe mount on deposit at UNM, Adam Bates holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Aug 2012
Mass (g):1300
Pieces:1
Class:L4
Weathering grade:W1
Fayalite (mol%):25.7±0.3
Ferrosilite (mol%):19.7±3.3
Wollastonite (mol%):0.7±0.6
Classifier:C. Agee, UNM
Type spec mass (g):24
Type spec location:UNM
Main mass:Adam Bates
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 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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