NWA 7490 (4,373 g)

Northwest Africa 7490 (NWA 7490)
(Northwest Africa)
Purchased: 2012
Classification: HED achondrite (Diogenite)
Petrography: The meteorite displays a cumulate texture of dominantly large orthopyroxene crystals, subordinate calcic plagioclase, and minor olivine. Accessory minerals include chromite and troilite; no eucrite clasts were found. Orthopyroxene Fs24.1-26Wo3.4-4.6, FeO/MnO=27-33; olivine Fa27.3; plagioclase An82.9, range 77.1-91.6.
 
Place of purchase:
Erfoud, Morocco
Date:
P 2012
Mass (g):
1050
Pieces:
>10
Class:
Diogenite
Shock stage:
low
Weathering grade:
low
Fayalite (mol%):
27.3
Ferrosilite (mol%):
24.1-26
Wollastonite (mol%):
3.4-4.6
Classifier:
Ansgar Greshake, MNB
Type spec mass (g):
20.2
Type spec location:
MNB
Main mass:
Marcin Cimala
Comments:
Submitted by Ansgar Greshake