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Northwest Africa 8543
Basic information Name: Northwest Africa 8543
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8543
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 148.9 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  LL4
Recommended:  LL4    [explanation]

This is 1 of 357 approved meteorites classified as LL4.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 22 Sep 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8543 (NWA 8543)

(Northwest Africa)

Purchased: 2013

Classification: Ordinary chondrite (LL4)

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

Physical characteristics: Three matching stones 73.7 g, 48.2 g, 27.1 g, weathered exterior, saw cut reveals chondrules and fine-grained metal/sulfide set in a gray groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous distinct chondrules and plagioclase grains <2 μm, FeNi metal, troilite, Fe-oxide, Cl-rich apatite.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa28.4±1.3, Fe/Mn=56±3, n=7; low-Ca pyroxene Fs20.9±5.4Wo1.4±0.8, Fe/Mn=31±6, n=6.

Classification: Ordinary chondrite (LL4), weathering grade W2.

Specimens: 20.9 g including a probe mount on deposit at UNM, S. Tutorow holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):148.9
Pieces:1
Class:LL4
Weathering grade:W2
Fayalite (mol%):28.4±1.3
Ferrosilite (mol%):20.9±5.4
Wollastonite (mol%):1.4±0.8
Classifier:C. Agee, UNM
Type spec mass (g):20.9
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G582; 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Michael S. Scherman   
Mike Markowitz   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2047 unapproved names)

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