5.217g Martian Meteorite with Crust I Mars SHERGOTTITE - NWA 11668
On Offer: 5.217g Martian Meteorite fragment with some crust.
|Northwest Africa 11668|
Name: Northwest Africa 11668
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11668
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 20 g
This is 1 of 174 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites
|Comments:||Approved 27 Mar 2018|
Writeup from MB 107:
Northwest Africa 11668 (NWA 11668)
Classification: Martian meteorite (Shergottite)
History: The meteorite was purchased in Tindouf, Algeria, from a Sahrawi dealer.
Physical characteristics: Four dark-green pieces partly covered with fusion crust.
Petrography: The meteorite is a medium grained basalt predominantly composed of up to 1.5 mm sized pyroxene and plagioclase grains. Pyroxene is intensely fractured pigeonite and augite displaying mottled compositional zoning. Plagioclase is completely transformed into compositionally homogeneous maskelynite. Minor phases are ilmenite, ulvöspinel, pyrrhotite and some Si-rich mesostasis.
Geochemistry: pigeonite: Fs53.7±4.4Wo14.3±2.4 (Fs35.5-59.6Wo9.7-20.0, n=38, FeO/MnO=33-43); augite: Fs26.2±7.0Wo32.2±3.9 (Fs21.1-48.9Wo20.6-37.8, n=32, FeO/MnO=27-40); feldspar: An56.8Ab42.0Or1.2, n=15
Classification: Martian (basaltic shergottite)
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