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Northwest Africa 10894
Basic information Name: Northwest Africa 10894
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10894
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 2.52 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-cm
Recommended:  Eucrite-cm    [explanation]

This is 1 of 44 approved meteorites classified as Eucrite-cm.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Nov 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10894 (NWA 10894)

Mauritania

Purchased: April 2016

Classification: HED achondrite (Eucrite, cumulate)

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

Physical characteristics: Single stone. Partial fusion crusted exterior. A saw cut reveals mm-size white feldspar and light green pyroxene grains, a few oxide-stained metal grains present. Friable.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately equal amounts of pyroxene and plagioclase, unbrecciated, shock melt pockets with vesicles are present. Accessory low-Ni iron metal and chromite observed.

Geochemistry: (C. Agee and M. Spilde, UNM) Pigeonite Fs37.3±2.4Wo8.2±3.7, Fe/Mn=26±1, n=12; plagioclase An96.0±0.2, n=7; shock melt (proxy for bulk composition) SiO2=46.7±0.3, TiO2=0.01±0.01, Al2O3=14.3±0.4, Cr2O3=0.31±0.02, MgO=11.1±0.2, FeO=13.5±0.2, MnO=0.52±0.03, NiO=0.02±0.02, CaO=10.3±0.2, Na2O=0.19±0.02, K2O=0.02±0.01 (all wt%), Mg#=59.3±0.1, n=3.

Classification: Achondrite (cumulate eucrite).

Specimens: 20.1 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P April 2016
Mass (g):2519
Pieces:1
Class:Eucrite-cm
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):37.3±2.4
Wollastonite (mol%):8.2±3.7
Classifier:C. Agee, UNM
Type spec mass (g):20.1
Type spec location:UNM
Main mass:DPitt
Comments:Field name MVCH80; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 101 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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