NWA 13336 (6,000 g)
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.
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 |