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Northwest Africa 8546
Basic information Name: Northwest Africa 8546
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8546
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 77.7 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 434 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 18 Oct 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8546 (NWA 8546)

(Northwest Africa)

Purchased: 2013

Classification: HED achondrite (Diogenite)

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

Physical characteristics: Single stone. Remnants of weathered fusion crust on exterior. Saw cut reveals nearly monomineralic, coarsely crystalline, mosaic texture, grains in the range 2-4 mm, gray-green, some light oxidation.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows ~99% pyroxene with triple junctions and a texturally equilibrated appearance. Pyroxenes have thin Fe-enriched rims, grain boundaries are occupied by fine grained plagioclase and silica. Scattered troilite and Fe-metal as blebs, also Fe-oxide veinlets present, barite detected.

Geochemistry: (C. Agee and N. Muttik, UNM) Low-Ca pyroxene (cores) Fs18.4±0.5Wo1.0±0.0, Fe/Mn=30±1, n=12; low-Ca pyroxene (rims) Fs32.6±5.6Wo2.9±0.8, Fe/Mn=28±2, n=2; plagioclase An91.4±2.3Ab8.2±2.1Or0.3±0.2, n=2.

Classification: Achondrite (diogenite)

Specimens: 15.8 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):77.7
Pieces:1
Class:Diogenite
Weathering grade:moderate
Ferrosilite (mol%):18.4; 32.6
Wollastonite (mol%):1.0; 2.9
Classifier:C. Agee, UNM
Type spec mass (g):15.8
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G522; 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 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

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