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Northwest Africa 13336
Basic information Name: Northwest Africa 13336
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13336
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 290 g
Classification
  history:
Recommended:  CR2    [explanation]

This is 1 of 167 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 4 Jul 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13336 (NWA 13336)

(Northwest Africa)

Purchased: 2020

Classification: Carbonaceous chondrite (CR2)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Light-brownish rock with some fusion crust.

Petrography: The meteorite is a carbonaceous chondrite composed of abundant, often slightly flattened chondrules with an apparent mean diameter of about 800 µm and about 30-40% almost black matrix. Chondrules are mostly of type I but two type II chondrules with highly unequilibrated olivine were observed in the section studied. Some chondrules are metal-decorated typical of CR.

Geochemistry: olivine in type I chondrules: Fa1.3±0.4, Cr2O3: 0.49±0.05 wt%, n=13; low-Ca pyroxene: Fs2.8±0.3Wo0.5±0.6, n=16; olivine in type II chondrules: Fa28.3±9.0 (Fa17.0-46.1, n=9). Matrix analyses yield an average total of 88.1±1.2 wt% (5 µm defocused beam, N=10) suggesting the presence of hydrous minerals.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):290
Pieces:1
Class:CR2
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):1.3; 28.3
Ferrosilite (mol%):2.8
Wollastonite (mol%):0.5
Classifier:A. Greshake, MNB
Type spec mass (g):20
Type spec location:MNB
Main mass:Philippe Schmitt-Kopplin
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake      
Geography: 
Coordinates:Unknown.

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

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