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Northwest Africa 10996
Basic information Name: Northwest Africa 10996
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10996
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 198 g
Meteoritical Bulletin:  MB 105  (2016)  CR2
Recommended:  CR2    [explanation]

This is 1 of 183 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 17 Dec 2016
Writeup from MB 105:

Northwest Africa 10996 (NWA 10996)

(Northwest Africa)

Purchased: 2015

Classification: Carbonaceous chondrite (CR2)

History: Purchased by Jay Piatek in Morocco, 2015.

Physical characteristics: Weathered exterior. A broken surface reveals dark groundmass with some oxidation.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous type I chondrules; two type II chondrules were observed in the mount. Some chondrules are armored with metal/oxide typical of CR. Much of the metal, which makes up 5-10% of the meteorite, has been oxidized. Gehlenite-akermanite, Al-diopside were observed. Fine grained matrix was found throughout.

Geochemistry: (C. Agee and N. Muttik, UNM) Forsterite Fa2.3±1.0, Cr2O3=0.51±0.21 wt%, n=14; enstatite Fs3.5±1.5Wo0.7±0.3, n=15; ferroan olivine in the type II chondrules Fa20.3-43.0, n=4.

Classification: Carbonaceous chondrite (CR2).

Specimens: 20.8 g including a probe mount on deposit at UNM, Jay Piatek holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):198
Shock stage:moderate
Weathering grade:high
Fayalite (mol%):2.3±1.0
Ferrosilite (mol%):3.5±1.5
Wollastonite (mol%):0.7±0.3
Classifier:C. Agee, UNM
Type spec mass (g):20.8
Type spec location:UNM
Main mass:Jay Piatek
Comments:Fieldname JP-27; submitted by C. Agee
   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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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