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Northwest Africa 12371
Basic information Name: Northwest Africa 12371
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12371
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 29.7 g
Classification
  history:
Recommended:  Acapulcoite    [explanation]

This is 1 of 78 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 29 Nov 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12371 (NWA 12371)

Morocco

Purchased: 2011

Classification: Primitive achondrite (Acapulcoite)

History: Purchased by Doug Ross in 2011 from a dealer in Cumberland, Maryland.

Physical characteristics: Two stones, dark fusion crust, moderately weathered exterior. A saw cut reveals some small metal grains set in a dark-brown, fine-grained groundmass, some oxide staining; one dark clast appears in the middle of the larger stone.

Petrography: This meteorite exhibits a granoblastic texture with abundant triple junctions.  Grain sizes are 100-300 μm in diameter.  Olivine, pyroxene and plagioclase are uniformly distributed, but metal and sulfide are heterogeneous in distribution.  Small (~10-20 μm) metal blebs are present, as is typical in acapulcoites.  Weathering is moderate(B/C) with extensive staining of the thin section.

Geochemistry: Microprobe analyses of olivines show Fa9.14±0.14 (n=11) consistent with acapulcoite.

Classification: Achondrite, acapulcoite

Specimens: Three small pieces (of one stone) totaling 6.94 g and a thin section (one inch round) are on deposit at SI. Doug Ross holds the main mass of 20.98 g.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Maryland USA
Date:P 2011
Mass (g):29.65
Pieces:2
Class:Acapulcoite
Weathering grade:B/C
Fayalite (mol%):9.14±0.14 (n = 11)
Ferrosilite (mol%):10 (n=16); 4 (n = 5)
Wollastonite (mol%):2 (n=16); 43 (n=5)
Classifier:C. Corrigan, D. Ross, SI
Type spec mass (g):6.94
Type spec location:SI
Main mass:Doug Ross
Comments:Submitted by Doug Ross
Institutions
   and collections
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1419 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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