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Northwest Africa 7287 | |||||||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7287 This is an OFFICIAL meteorite name. Abbreviation: NWA 7287 Observed fall: No Year found: 2012 Country: (Northwest Africa) Mass: 2.56 kg | ||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 37 approved meteorites classified as LL3-6. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||||||
Comments: | Approved 29 Sep 2013 | ||||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7287 (NWA 7287) (Northwest Africa) Found: 2011 Classification: Ordinary chondrite (LL3-6) History: Discovered by local people in the Tindouf area in 2011, purchased in Agadir in 2012 Feb. Physical characteristics: One brown stone of 2564 g mostly covered with black-brown crust; saw-cut shows chondrules and various clasts set in fine-grained brown matrix. Magnetic susceptibility log χ = 3.75. Petrography: Microprobe examination of a thin section shows fractured fine clastic matrix with mineral fragments, common porphyritic chondrules of 0.5 mm, and clasts of various textures. Beside matrix, five distinct lithologies identified based on texture and mineral composition Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Matrix: Olivine Fa0.5-4.3, mean Fa29.5±5.9, n=18; pyroxene Fs20.1-26.5Wo0.5-4.3, mean Fs23.9±2.1Wo2.4±1.4, n=8. Clasts (all): Olivine Fa24.1-34.0, mean Fa30.0±1.6, n=89; pyroxene Fs3.3-28.6Wo0.3-4.3, mean Fs22.4±6.6,Wo2.2±0.1, n=29. Classification: Ordinary Chondrite (LL3-6) Specimens: 25.6 g on deposit at MNRJ, main mass Bart. | ||||||||||||||||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
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Institutions and collections |
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013) MNRJ: Museu Nacional, Quinta da Boa Vista, Rio de Janeiro, CEP 20940-040, Brazil (institutional address; updated 26 Dec 2011) Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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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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