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Northwest Africa 12931
Basic information Name: Northwest Africa 12931
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12931
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 2.06 kg
Classification
  history:
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 21 Nov 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12931 (NWA 12931)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Diogenite)

History: Purchased Nov 2016 by Dustin Dickens in Mauritania from anonymous dealer.

Physical characteristics: Single stone with desert weathered exterior. Saw cut and broken surfaces reveal a light-colored interior. Friable.

Petrography: (C. Agee, UNM) This meteorite is an equilibrated orthopyroxenite with ~95% pyroxene, and minor amounts of silica, chromite and troilite. No olivine or plagioclase were detected.

Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs27.5±0.3Wo3.6±0.3, Fe/Mn=26±1, n=12.

Classification: Diogenite

Specimens: 21.6 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2016
Mass (g):2061
Pieces:1
Class:Diogenite
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):27.3±0.6
Wollastonite (mol%):3.6±1.0
Classifier:C. Agee, UNM
Type spec mass (g):21.6
Type spec location:UNM
Main mass:Dustin Dickens
Comments:Field name DD-56; 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. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7048 approved meteorites from (Northwest Africa) (plus 1998 unapproved names)

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