Image nwa 1950 2
Copyright 2008

Image nwa 1950 3

Image nwa 1959 4
Copyright 2008
Copyright 2008
Two stones (414 and 383 g) were found in the Atlas mountains (Morocco) in 2001 January and
March. The exact location of find is unknown. The meteorite is a cumulate peridotitic rock
consisting of olivine (~55 vol%), low and high-Ca pyroxenes (~35 vol%) and plagioclase glass
(~8 vol%). Accessory minerals include phosphates (merrillite), chromite and spinels (inclusions
in olivines and pyroxenes), sulfides (pyrrhotite), and a glass rich in potassium.The igneous
texture is very similar to that of the ALHA77005. Classification and mineralogy (P. Gillet,
ENSL,  J.A. Barrat, UAng, M. Bohn, Ifremer): pyroxenes are pigeonite,
En78Fs19Wo2-En60Fs26Wo14, and augite, En53Fs16Wo31-En45Fs14Wo41; maskelynite
ranges from An57Ab41Or1 to An40Ab57Or3. The key element weight-ratios FeO*/MnO is
close to 30 for pigeonite and close to 50 for olivines. Geochemistry: REE pattern similar to that
of ALHA77005 but with higher values. Specimens: type specimen, 20 g, ENSL; main mass,
Meteorite Name
NWA 1950
(Martian) Lherzdilitic Shergottite
Found 2001, North West Africa
Weathering &
Shock Level
Specimen Type
polished thin section
NWA 1950 "lherzolitic" shergottite

Image nwa 1950 1
Copyright 2008