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Northwest Africa 7498
Basic information Name: Northwest Africa 7498
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7498
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 1101 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  L4
Recommended:  L4    [explanation]

This is 1 of 2062 approved meteorites (plus 5 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 23 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7498 (NWA 7498)

Morocco

Purchased: Aug 2012

Classification: Ordinary chondrite (L4)

History: Purchased by Adam Bates in Morocco, August 2012.

Physical characteristics: Single stone, dark, weathered, oxidized crust, saw-cut reveals fine-grained metal/sulfide, numerous chondrules, some up to 2 mm set in gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a numerous PO, POP, and PP chondrules, most with mesostasis and fine grained plagioclase, moderate oxidation of metal. Abundant troilite, some decorating chondrule rims, scattered taenite and kamacite, minor Cl-rich apatite and high-Ca pyroxene.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa23.2±0.4, Fe/Mn=48±3, n=30; low-Ca pyroxene Fs15.2±4.2Wo1.2±1.1, Fe/Mn=32±11, n=28.

Classification: Ordinary chondrite (L4), Fs value is low for L-chondrite, weathering grade W2.

Specimens: 25 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):1101
Pieces:1
Class:L4
Weathering grade:W2
Fayalite (mol%):23.2±0.4
Ferrosilite (mol%):15.2±4.2
Wollastonite (mol%):1.2±1.1
Classifier:C. Agee, UNM
Type spec mass (g):25
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
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)
Also see:
  This lists the most popular meteorites among people who looked up this meteorite.
Revision
  history:
  This lists important revisions made to data for this record.

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