NWA 11338 (CK4)

One stone weighing 381.8.g was purchased from a Moroccan dealer in March of 2017. A sample of this stone was sent to Dr. Anthony Irving who determined the stone to be a CK4 carbonaceous chondrite with a shock grade of 2 and a low weathering grade. The stone features a nice array of chondrules and small CAI’s in a grayish brown matrix.

I prepared the full slices (part slices to come soon) which are slightly polished on one side, the endcuts also come slightly polished just enough to accentuate the chondrules within the matrix. The slices which will come in a quality labeled meteorite display box.

Petrography as follows:

Separated, well-formed chondrules (apparent diameter 500±200 μm, N = 10) containing Cr-magnetite occur in a finer grained matrix containing stained magnetite, intermediate plagioclase and minor barite. Olivine (Fa24.6-25.0, FeO/MnO = 88-102, N = 3), orthopyroxene (Fs3.5-20.0Wo1.4-1.1, N = 3), low-Ca pyroxene (Fs21.5Wo5.0), augite (Fs21.9Wo49.2).

Meteoritical Bulletin entry can be found here.

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