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Northwest Africa 10893
Basic information Name: Northwest Africa 10893
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10893
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 677 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 629 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 18 Nov 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10893 (NWA 10893)

Mauritania

Purchased: April 2016

Classification: Ureilite

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

Physical characteristics: Single stone with no fusion crust, irregular exterior surface. A saw-cut surface shows a mosaic of brown and gray colored silicate grains.

Petrography: (C. Agee, UNM) This meteorite has approximately 70% olivine and 25% pyroxene. The olivine grain boundaries contain fine-grained iron metal and oxidized iron. No plagioclase was detected.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa21.9±0.3, Fe/Mn=49±4, Cr2O3=0.42±0.02 (wt%), CaO=0.27±0.01 (wt%), n=6. Pigeonite Fs18.6±0.1Wo9.0±0.1, Fe/Mn=28±2, n=6.

Classification: Ureilite based on iron reduction in rims and grain boundaries of olivines, Cr2O3 and CaO content of olivine, and typical ureilite mineralogy of olivine + pigeonite.

Specimens: 22 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):677.2
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):21.9±0.3
Ferrosilite (mol%):18.6±0.1
Wollastonite (mol%):9.0±0.1
Classifier:C. Agee, UNM
Type spec mass (g):22
Type spec location:UNM
Main mass:DPitt
Comments:Field name MVCH77; 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
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Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 193 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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