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| Northwest Africa 11404 | |||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 11404 This is an OFFICIAL meteorite name. Abbreviation: NWA 11404 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass:  1096 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 11 approved meteorites (plus 1 unapproved name) classified as Iron, IC. [show all] Search for other: IC irons, Iron meteorites, and Metal-rich meteorites | ||||||||||||||||||||||||
| Comments: | Approved 4 Sep 2017 | ||||||||||||||||||||||||
| Writeup |
Writeup from MB 106:
Northwest Africa 11404 (NWA 11404) (Northwest Africa) Purchased: June 2016 Classification: Iron meteorite (IC) History: Bought in Zagora in June 2016. Petrography: (J. Gattacceca, H. Pourkhorsandi, CEREGE): The etched section shows a fine-scaled struture of interlocking ~2 μm thick curved metal spindles. This indicates decompositon of the original metal into alpha+gamma phases, and heavy plastic deformation. The Widmanstätten structure has been entirely obliterated by these processes. Abundant schreibersite as euhedral grains (2-5 μm, to 10 μm) or needles up to 200 μm long. Geochemistry: (M. D’Orazio, DST-PI): Composition of the metal (ICP-MS; D’Orazio and Folco, 2003) is Co=0.464, Ni=6.32 (both in wt%), Cr=14.6, Cu=142, Ga=61, Ge=254, As=5.0, Mo=6.3, Ru=14.2, Rh=2.32, Pd=2.09, W=2.16, Re=0.16, Ir=2.42, Pt=16.6, Au=0.527 (all in ppm). Classification: Iron, IC Specimens: 25 g and a polished section at CEREGE, main mass with Labenne. | ||||||||||||||||||||||||
| Data from: MB106 Table 0 Line 0: |
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| Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 10 Jun 2023) DST-PI: Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy (institutional address; updated 17 Oct 2011) Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012) |
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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 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names) | ||||||||||||||||||||||||