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Northwest Africa 12932
Basic information Name: Northwest Africa 12932
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12932
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 2.91 kg
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 131 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 21 Nov 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12932 (NWA 12932)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, unbrecciated)

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

Physical characteristics: Single stone, fusion-crusted exterior, broken surface and saw cut reveals a light colored, fine-grained mix of plagioclase and pyroxene grains.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows an ophitic texture with approximately 60% pyroxene and 35% plagioclase. Many pyroxenes have exsolution lamellae. Minor silica and troilite observed.

Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs61.9±0.6Wo2.8±1.1, Fe/Mn=31±1, n=8; high-Ca pyroxene Fs28.2±2.1Wo43.2±2.3, Fe/Mn=31±1, n=4; plagioclase An86.7±4.1, n=6.

Classification: Basaltic eucrite, equilibrated, unbrecciated.

Specimens: 20.6 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):2912
Pieces:1
Class:Eucrite-unbr
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):61.9±0.6, 28.2±2.1
Wollastonite (mol%):2.8±1.1, 43.2±2.3
Classifier:C. Agee, UNM
Type spec mass (g):20.6
Type spec location:UNM
Main mass:Dustin Dickens
Comments:Field name DD-57; 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 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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