Northwest Africa 4931 meteorite (NWA 4931), Tagounite Caïdat, Zagora Cercle, Zagora Province, Drâa-Tafilalet Region, Moroccoi

Regional Level Types
Northwest Africa 4931 meteorite (NWA 4931)	Meteorite Fall Location
Tagounite Caïdat	Caïdat
Zagora Cercle	Cercle
Zagora Province	Province
Drâa-Tafilalet Region	Region
Morocco	Country

Angrite, found 2007, 2.14 kg

Northwest Africa 4931 (or, NWA 4931) is the 3rd most massive Angrite stone. However, it is part of the NWA 2999 pairing group of 7 meteorites with a total mass of ~6 kg. Pieces of a single meteoroid are, of course, frequently separated during atmospheric entry and/or upon impact with the earth’s surface. In the meteoritical literature, the pieces are then referred to as pieces of a single meteorite. With most NWA meteorites, however, it is often impossible to separate many natural effects from subsequent human activities — specimen divisions to increase profits and various efforts to keep the location site(s) secret. It is highly likely, then, that NWA 4931 is simply the largest piece of a single meteorite. We list here only those mineral species which have been found in the NWA 4931 ‘fragment.’ Presumably, a listing under NWA 2999 (The first fragment to be found) would be the appropriate site for a complete inventory of the meteorite sensu strictu.

References to NWA 4931 are scarce and many electronic publications are available to the public only in abstract form. Angrites are invariably characterized by the presence of Fassaite (Ti-rich Augite) and Ca-rich Olivine. Plagioclase and Kirschsteinite are usually present as well. The Goethite and Magnetite listed here were reported as weathering products. However, one should note that Ti-rich Magnetite is reported in other Angrites as normal members of the characteristic Al,Ca,Ti-rich assemblages which distinguish Angrites from other igneous achondrites.

Other Regions, Features and Areas containing this locality

References