NWA 13850 (13,490 g)

Northwest Africa 13850 (NWA 13850)
(Northwest Africa)
Purchased: January, 2021
Classification: Ureilite
History: The meteorite was purchased from a dealer in Morocco.
Physical characteristics: Dark-grayish rock without fusion crust.
Petrography: The meteorite shows a coarse-grained cumulate texture of olivine and pigeonite grains up to 2.5 mm in sizes. Olivine and pyroxene display characteristic reduced rims and the meteorite contains flaky graphite.
Geochemistry: reduced rims in olivine: Fa3.5-4.6; olivine contains 0.82±0.04 wt% Cr2O3 and 0.42±0.01 wt% CaO; reduced rims in pyroxene: Fs6.4-7.6Wo7.5-8.5; pigeonite contains 1.10±0.03 wt% Cr2O3 and 0.31±0.01 wt% Al2O3
 
Place of purchase:
Morocco
Date:
P January, 2021
Mass (g):
856
Pieces:
1
Class:
Ureilite
Shock stage:
low
Weathering grade:
low
Fayalite (mol%):
15.6±0.1 (n=6)
Ferrosilite (mol%):
13.2±0.1 (n=6)
Wollastonite (mol%):
8.4±0.1 (n=6)
Classifier:
A. Greshake, MNB
Type spec mass (g):
23.2
Type spec location:
MNB
Main mass:
Hanno Strufe
Comments:
Submitted by Ansgar Greshake