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Northwest Africa 12929
Basic information Name: Northwest Africa 12929
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12929
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 23.7 kg
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 274 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 21 Nov 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12929 (NWA 12929)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, monomict)

History: Purchased Dec. 2018 by Dustin Dickens in Morocco from anonymous dealer.

Physical characteristics: Many identically appearing pieces, desert weathered exterior, broken surface reveals a dark, fine grained interior.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows mild brecciation with approximately 60% pyroxene and 35% plagioclase. Many pyroxenes have exsolution lamellae. Minor silica and troilite observed. Shock melt veins are present.

Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs61.6±1.8Wo3.3±2.4, Fe/Mn=32±0, n=9; high-Ca pyroxene Fs36.7±9.5Wo33.4±10.9, Fe/Mn=31±0, n=4; plagioclase An89.4±3.1, n=7.

Classification: Monomict basaltic eucrite, equilibrated.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2016
Mass (g):23700
Pieces:Many
Class:Eucrite-mmict
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):61.6±1.8, 36.7±9.5
Wollastonite (mol%):3.3±2.4, 33.4±10.9
Classifier:C. Agee, UNM
Type spec mass (g):23.8
Type spec location:UNM
Main mass:Dustin Dickens
Comments:Field name DD-54; 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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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