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Northwest Africa 4235 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 4235 This is an OFFICIAL meteorite name. Abbreviation: NWA 4235 Observed fall: No Year found: 2004 Country: (Northwest Africa) Mass: 59 g | ||||||||||||||||||||||
Classification history: |
This is 1 of 270 approved meteorites classified as Mesosiderite. [show all] Search for other: Mesosiderites, Metal-rich meteorites | ||||||||||||||||||||||
Comments: | Approved 1 Sep 2006 | ||||||||||||||||||||||
Writeup |
Writeup from MB 91:
Northwest Africa 4235 Northwest Africa Find: 2004 Achondrite (mesosiderite) History: Twelve small pieces were purchased at the Hamburg Mineral Fair, Germany, from a Moroccan dealer in 2004. An anonymous finder recovered the meteorites from the western part of the Sahara. Physical characteristics: The small angular fragments, with a total weight of 59 g, are without fusion crust. Large orthopyroxene crystals (up to 5 mm) are visible in the stony portions. Petrography: (J. Schlüter, Ham) The stony portion with orthopyroxene and clinopyroxene, rich in plagioclase, shows a cataclastic texture with large mineral fragments (300– 900 µm) in a coarse matrix (>10 µm). Apatite and chromite grains are also observed. Mineral compositions: Orthopyroxene (Fs26.5Wo3.0; range: Fs25.4–27.4Wo2.1–4.9; n = 16), plagioclase (An91.3Or0.4; range: An89.7–94.4Or0.3–0.5; n = 12), kamacite (Ni = 5.98 wt%), taenite (Ni = 46.3 wt%), fluorapatite (MgO = 3.69 wt%). Classification: Achondrite (mesosiderite); minimal shock and weathering. Type specimen: A total of 11.8 g sample is on deposit at Hamb. Herkstroeter holds the main mass. | ||||||||||||||||||||||
Data from: MB91 Table 2 Line 236: |
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Institutions and collections |
Hamb: Museum der Natur Hamburg - Mineralogie, Grindelallee 48, D-20146 Hamburg, Germany; Website (institutional address; updated 18 Jan 2024) Ham: Museum der Natur Hamburg - Mineralogie, Grindelallee 48, D-20146 Hamburg, Germany; Website (institutional address; updated 18 Jan 2024) Herkstroeter: Ingo Herkstroeter, Hamburg, Germany (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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