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Northwest Africa 1950 | |||||||||||||||||
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Basic information | Name: Northwest Africa 1950 This is an OFFICIAL meteorite name. Abbreviation: NWA 1950 Observed fall: No Year found: 2001 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||
Classification history: |
This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||
Writeup![]() |
Writeup from MB 88:
Northwest Africa 1950 Morocco Found 2001 January and March Martian meteorite (lherzolitic shergottite) 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, Fectay. | ||||||||||||||||
Data from: MB88 Table 4 Line 106: |
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Institutions and collections |
ENSL: Ecole Normale Supérieure de Lyon, Laboratoire de Sciences de la Terre, 46 allée d'Italie 69364 Lyon Cedex, France (institutional address; updated 27 Feb 2011) Fectay: Bruno Fectay and Carine Bidaut, La Memoire de la Terre SARL, 39800 Aumont, France; Website (private address) Ifremer: Institut Français de recherché pour l’exploitation de la mer Brest, BP70, F-29280 Plouzané Cedex, France (institutional address) UAng: Université d'Angers, Faculté des Sciences, 2 bd Lavoisier, 49045 Angers Cedex, France (institutional address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)
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Geography: |
Statistics: This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |