Northwest Africa 5167 meteorite (NWA 5167), Northwest Africa Meteorites
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|Locality type:||Meteorite Fall Location|
|Meteorite Class:||Angrite meteorite|
|Meteoritical Society Class:||Angrite|
|Metbull:||View entry in Meteoritical Bulletin Database|
Find, 2007; 859 g, 2 stones.
The Northwest Africa 5167 meteorite (NWA 5167) was purchased in Erfoud, Morocco. The primary stone (850 g) is dark brown and lacks a fusion crust. Ca-rich olivine (Fa43) and fassaite, found as crystals up to 0.5 mm in size, are the dominant phases in the coarse-grained rock. Nearly pure anorthite (An100) and hercynitic spinel, ubiquitous components of almost all angrites, are present in accessory amounts. Minor amounts of Fe-Ni metal, almost completely oxidized into Ni-bearing iron oxides, and remnants of now oxidized sulfides, indicate that upon arrival the meteorite would have been a metal-bearing angrite.
NWA 5167 is one of 15 recovered angrite meteorites. In its discovery announcement, a possible pairing with the NWA 2999 meteorite group was suggested. However, the fayalite content of NWA 5167's olivine appears to be somewhat outside the very narrow range of reported olivine in the NWA 2999 ensemble (Fa40±1). The ferrosilite content of NWA 5167 fassaite (Fs8) also appears to be too low.
3 valid minerals.
Meteorite/Rock Types Recorded
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Ruzicka, A., Grossman, J. N. & Garvie, L. (2014) Meteoritical Bulletin, no. 100: Meteoritical & Planetary science 49: E1-E101. (Aug 2014) [Online supplement]
Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.