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Northwest Africa 8547
Basic information Name: Northwest Africa 8547
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8547
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 103.8 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 660 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 18 Oct 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8547 (NWA 8547)

(Northwest Africa)

Purchased: 2013

Classification: Ureilite

History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, April, 2013.

Physical characteristics: Single stone. Irregular dark exterior saw cut reveals fresh appearing, mosaic of light gray crystals, grain size 1-3 mm.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows texturally equilibrated olivines and pyroxenes, most with triple junctions. Olivine and pyroxene grains have Fe-depleted rims. Grain boundaries are occupied by graphite, Fe-metal, Fe-oxide, chromite, and very fine-grained Na-rich plagioclase, barite detected.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine (cores) Fa9.5±0.5, Fe/Mn=20±1, n=7; olivine (rims) Fa3.3±0.3, Fe/Mn=7±0, n=2; pigeonite (cores) Fs8.9±0.3Wo8.3±0.3, Fe/Mn=12±1, n=10 and(rim) Fs0.9Wo1.1, n=1.

Classification: Achondrite (ureilite)

Specimens: 20.0 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):103.8
Pieces:1
Class:Ureilite
Weathering grade:low
Classifier:C. Agee, UNM
Type spec mass (g):20.0
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G523; submitted by C. Agee, UNM
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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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