NWA 13562 ( 4,806 g )

Northwest Africa 13562 (NWA 13562)
(Northwest Africa)
Purchased: 2020
Classification: Primitive achondrite (Lodranite)
History: The meteorite was purchased from a dealer in Morocco.
Physical characteristics: Light-brownish fragment with minor fusion crust.
Petrography: The meteorite shows a coarse-grained granular texture predominantly composed of up to 4 mm sized magnesian olivine and low-Ca pyroxene grains. Some regions are brecciated. More minor phases include Ca-pyroxene, chromite, kamacite, and FeS. Ca-pyroxene is mostly presents as fine exsolution lamellae in low-Ca pyroxene. No feldspar was found in the section studied.
Geochemistry: olivine: Fa10.7±0.2 (FeO/MnO=32±3, n=10); low-Ca pyroxene: Fs10.7±0.4Wo2.4±0.3, (FeO/MnO=21±2, n=10); Ca-pyroxene: Fs3.7±0.1Wo45.6±0.4, (FeO/MnO=12±1, n=14)
 
Place of purchase:
Morocco
Date:
P 2020
Mass (g):
90
Pieces:
1
Class:
Lodranite
Shock stage:
S2
Weathering grade:
W2
Fayalite (mol%):
10.7
Ferrosilite (mol%):
10.7; 3.7
Wollastonite (mol%):
2.4; 45.6
Classifier:
A. Greshake, MNB
Type spec mass (g):
18
Type spec location:
MNB
Main mass:
Philippe Schmitt-Kopplin
Comments:
Submitted by Ansgar Greshake