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Northwest Africa 12677
Basic information Name: Northwest Africa 12677
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12677
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 231 g
Meteoritical Bulletin:  MB 108  (2020)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 86 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 11 Jun 2019
Writeup from MB 108:

Northwest Africa 12677 (NWA 12677)

(Northwest Africa)

Purchased: 2018

Classification: Primitive achondrite (Acapulcoite)

History: Purchased by Larry Atkins from Morocco in October 2018.

Physical characteristics: 12 pieces that fit together to form a single stone, sandblasted exterior; saw cut surface reveals gray mosaic of silicate grains, many bright metal grains visible.

Petrography: (C. Agee, UNM) Microprobe examination shows texturally equilibrated grains of olivine, pyroxene, and plagioclase with many triple junctions. Grain size ranges ~50-400 μm. Metal makes up approximately 15% of this meteorite. Troilite and Cl-rich apatite are minor ubiquitous phases.

Geochemistry: (C. Agee, UNM) Olivine Fa11.4±0.1, Fe/Mn=23±1, n=6; low-Ca pyroxene Fs10.7±0.0Wo2.0±0.3, Fe/Mn=13±0, n=3; high-Ca pyroxene Fs4.5±0.4Wo44.3±1.3, Fe/Mn=9±1, n=3; plagioclase Ab80.4±0.5An16.0±0.4Or3.6±0.4, n=5.

Classification: Acapulcoite

Specimens: 21.8 g including a probe mount on deposit at UNM, Larry Atkins holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):231.4
Shock stage:low
Weathering grade:low
Fayalite (mol%):11.4±0.1
Ferrosilite (mol%):10.7±0.0, 4.5±0.4
Wollastonite (mol%):2.0±0.3, 44.3±1.3
Classifier:C. Agee, UNM
Type spec mass (g):21.8
Type spec location:UNM
Main mass:Larry Atkins
Comments:Field name LA-10; submitted by C. Agee, UNM
   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)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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