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Northwest Africa 6256 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6256 This is an OFFICIAL meteorite name. Abbreviation: NWA 6256 Observed fall: No Year found: 2009 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 235 approved meteorites classified as Mesosiderite. [show all] Search for other: Mesosiderites, Metal-rich meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 4 Mar 2017 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 106:
Northwest Africa 6256 (NWA 6256) (Northwest Africa) Purchased: 2009 Classification: Mesosiderite History: The meteorite was bought in 2009 from a meteorite dealer in Erfoud, Morocco. Physical characteristics: Many small brownish individuals totalling 500 g. Petrography: The silicate portion (about 60 vol%) of the meteorite dominantly consists of magmatically zoned up to 1.5 mm sized low-Ca pyroxene and less abundant olivine, Ca-pyroxene and calcic plagioclase. Minor phases include silica, chromite and merrillite. The metal portion has been completely altered to iron oxides and hydroxides. Geochemistry: olivine: Fa41.4±0.3 (Fa41.1-42.0, n=11, FeO/MnO=45-50); low-Ca pyroxene: Fs26.6±6.5Wo3.3±1.1 (Fs15.7-41.1Wo0.7-5.0, n=41, FeO/MnO=27-38); Ca-pyroxene: Fs43.8±2.4Wo8.7±1.3 (Fs39.1-46.8Wo6.8-11.4, n=10, FeO/MnO=24-27); calcic plagioclase: An87.7±0.5 (An87.1-88.8, n=15) | ||||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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Catalogs: |
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References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography: |
Statistics: This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |