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Northwest Africa 10933
Basic information Name: Northwest Africa 10933
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10933
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 116.4 g
Meteoritical Bulletin:  MB 105  (2016)  CK4
Recommended:  CK4    [explanation]

This is 1 of 119 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 10 Dec 2016
Writeup from MB 105:

Northwest Africa 10933 (NWA 10933)

(Northwest Africa)

Purchased: 2015

Classification: Carbonaceous chondrite (CK4)

History: One stone weighing 116.2 g was found and subsequently purchased in Morocco in 2015. Don Cline and John Sinclair acquired the sample from a meteorite prospector at the Tucson Gem and Mineral Show in February 2016.

Physical characteristics: The windowed sample is tabular in shape and has a few shallow regmaglypts. Sample 70% covered by a lightly weathered, dark-brown fusion crust which contains orange contraction cracks. The cut face shows a dark-green, friable interior with dark-gray-colored chondrules and dark-green clasts and magnetite.

Petrography: Description and classification (A. Love, App): Sample is a breccia composed of lithic fragments that show chondritic texture, sparsely distributed (avg. dia. 484 μm) chondrules (many display igneous rims), fragments and rare CAIs in a recrystallized matrix. Sample lacks sulfide but contains abundant chromium magnetite, augite and rare clinoenstatite.

Geochemistry: (A. Love, App) Olivine Fa31.0±0.7 (Fa29.1-32.2), N=12; Low-Ca pyroxene Fs23.1±2.5Wo0.8±0.1, N=9; Ca-pyroxene Fs13.6±0.1Wo44.2±5.6, N=2.

Classification: Based on textural relationships and mineral compositions, dominance of olivine and presence of of Cr-magnetite, this is a CK4, S2, W2 carbonaceous chondrite.

Specimens: PARI holds the 82.2 g main mass. A 20.8 g type specimen and one polished thin section are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Morrocco
Date:P 2015
Mass (g):116.4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):31.0±0.7 (N=12)
Ferrosilite (mol%):23.1±2.5 (N=9)
Wollastonite (mol%):0.8±0.1
Classifier:A. Love, App
Type spec mass (g):20.8
Type spec location:App
Main mass:PARI
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
PARI: Pisgah Astronomical Research Institute 1 Pari Dr Rosman, NC 28772, United States (institutional address; updated 13 Sep 2016)
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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