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Northwest Africa 8549
Basic information Name: Northwest Africa 8549
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8549
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 35.2 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 92 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Oct 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8549 (NWA 8549)

(Northwest Africa)

Purchased: 2013

Classification: HED achondrite (Eucrite, unbrecciated)

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

Physical characteristics: Single stone. Weathered fusion crusted exterior saw cut reveals a light gray, fine-grained, basaltic texture.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows texturally equilibrated pyroxenes and plagioclases, granoblastic to poikilitic with many triple junctions. Pyroxenes show exsolution lamellae. Silica, ilmenite, chromite, and troilite present.

Geochemistry: (C. Agee and N. Muttik, UNM) Low-Ca pyroxene Fs59.0±2.0Wo5.7±3.0, Fe/Mn=32±1, n=8; augite Fs32.3±0.5Wo37.8±0.6, Fe/Mn=31±1, n=7; plagioclase An88.8±0.3Ab10.5±0.3Or0.6±0.1, n=9.

Classification: Achondrite (unbrecciated eucrite), chemically and texturally equilibrated.

Specimens: 7.1 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):35.16
Pieces:1
Class:Eucrite-unbr
Weathering grade:low
Ferrosilite (mol%):59.0; 32.3
Wollastonite (mol%):5.7; 37.8
Classifier:C. Agee, UNM
Type spec mass (g):7.1
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G536; 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
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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