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Northwest Africa 11299
Basic information Name: Northwest Africa 11299
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11299
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 970 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CK5
Recommended:  CK5    [explanation]

This is 1 of 162 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 28 Jun 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11299 (NWA 11299)

(Northwest Africa)

Purchased: 2017

Classification: Carbonaceous chondrite (CK5)

History: A single stone weighing 969.7 g was found in Morocco and subsequently purchased by Blaine Reed at the 2017 Tucson Gem and Mineral show.

Physical characteristics: The stone is dark-orangish-brown in color, has a flattened ovoid shape, lacks fusion crust and has a weathered exterior with some chondrules protruding through the surface. The cut face showing the interior of the stone is dark greenish-brown and shows readily discernible dark-colored chondrules and irregular to circular dark-gray metallic grains.

Petrography: Description and classification (A. Love, App): Sample is recrystallized and has a texture composed of distinct chondrules with an average diameter of 693 μm, chondrule fragments, irregularly shaped CAIs within a fine, transparent crystalline matrix. Olivine chondrules are dominant. Sample contains minor pyroxene, and plagioclase (<50 μm in length) and Cr-magnetite.

Geochemistry: Olivine: Fa24.58±0.34 NiO 0.47±0.17, n=20; low Ca pyroxene Fs 21.29±0.67Wo1.02±2.17, n=9; high Ca pyroxene Fs4.77±3.11Wo41.94±6.97, n=2; plagioclase Ab65.01±7.67Or5.93±0.23, n=8; magnetite= Cr2O3 3.40±0.11wt%, Al2O3 0.48±0.23wt%, NiO 0.1±0.07wt% (n=5).

Classification: CK5. CK based on dark coloring, presence of CAIs and ubiquitous Cr-magnetite. Petrologic type 5 based on textures and equilibrated mineral compositions. Specimen has low FeO compositions compared to more highly oxidized CK chondrites, but shares compositional similarities to: Graves Nunataks 98102 (CK4 Fa24); NWA 5580 (CK4 Fa25.2); NWA 7615 (CK6 Fa24.7) and NWA 11207 (CK5 Fa24.9).

Specimens: Two slices weighing 39.05 g and one polished thin section are on deposit at App. Blaine Reed holds the main mass.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017
Mass (g):969.7
Pieces:1
Class:CK5
Fayalite (mol%):24.6±0.3 (N=20)
Ferrosilite (mol%):21.3±0.7 (N=9); 4.8±03.1 (N=2)
Wollastonite (mol%):1.0±2.2; 41.9±7.0
Classifier:A. Love, App
Type spec mass (g):39.05
Type spec location:App
Main mass:Blaine Reed
Finder:Anonymous
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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