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Northwest Africa 10895
Basic information Name: Northwest Africa 10895
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10895
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 2.53 kg
Meteoritical Bulletin:  MB 105  (2016)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 88 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 18 Nov 2016
Writeup from MB 105:

Northwest Africa 10895 (NWA 10895)


Purchased: April 2016

Classification: Primitive achondrite (Acapulcoite)

History: Found by meteorite hunters during an expedition near the Western Saharan, Algerian and Mauritanian border region. Purchased in Mauritania.

Physical characteristics: Single stone. A saw cut shows a mosaic of dark gray grains, most of which appear to be less than 1 mm in diameter.

Petrography: (C. Agee, UNM) This meteorite consists primarily of high-Ca pyroxene and olivine with most grain sizes in the probe section in the range 200-500 μm, there were also a few percent low-Ca pyroxene and plagioclase detected. Fe-Ni metal and oxidized metal is abundant, particularly as veins and along grain boundaries.

Geochemistry: : (C. Agee and M. Spilde, UNM) High-Ca pyroxene Fs6.1±0.4Wo42.0±1.8, Fe/Mn=11±1, Cr2O3=1.4±0.2 (wt%), n=5; olivine Fa13.8±0.3, Fe/Mn=25±1, n=6; plagioclase Ab76.7±2.7An20.5±3.2Or2.8±0.5, n=3.

Classification: Acapulcoite, not a lodranite, based on grain size of pyroxene and olivine, and the presence of plagioclase.

Specimens: 22 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P April 2016
Mass (g):2534
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):13.8±0.3
Ferrosilite (mol%):6.1±0.4
Wollastonite (mol%):42.0±1.8
Classifier:C. Agee, UNM
Type spec mass (g):22
Type spec location:UNM
Main mass:DPitt
Comments:Field name MVCH82; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 184 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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