|Northwest Africa 4901|
|Basic information||Name: Northwest Africa 4901|
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4901
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass: 24 g
This is 1 of 74 approved meteorites classified as Achondrite-ung. [show all]
Search for other: Achondrites, Ungrouped achondrites
|Comments:||Approved 10 Dec 2009|
Writeup from MB 97:
Northwest Africa 4901
Purchased 2007 in Erfoud, Morocco
Achondrite (ungrouped basalt)
History: The meteorite was found by an anonymous finder in northwest Africa and bought by the main mass holder in Erfoud, Morocco.
Physical characteristics: One brownish 24 g fragment was found.
Petrography: (A. Greshake, MNB): The meteorite displays an unbrecciated texture dominated by coarsegrained pyroxene and small, recrystallized plagioclase. Pyroxene is Ca-rich and shows abundant exsolution lamellae. Minor phases include silica, Ca-phosphates, ilmenite, and Ti-rich chromite.
Geochemistry: Mineral composition (EPMA): plagioclase, An79–87; pyroxene, Fs34.4–62.5Wo6.5–39.7; the Fe⁄Mn ratio of pyroxene is approximately 70.
Specimens: A total of 4.9 g plus one polished thin section are on deposit at MNB. Ralew holds the main mass.
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
|References:||Published in Meteoritical Bulletin, no. 97, MAPS 45, 449-493 (2010)|
This is 1 of 5725 approved meteorites from (Northwest Africa) (plus 2074 unapproved names)
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