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Northwest Africa 6164 | |||||||||||||||||||||
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Basic information | Name: Northwest Africa 6164 This is an OFFICIAL meteorite name. Abbreviation: NWA 6164 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||
Classification history: |
This is 1 of 120 approved meteorites classified as Iron, IAB-MG. [show all] Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites | ||||||||||||||||||||
Comments: | Approved 16 Sep 2010 | ||||||||||||||||||||
Writeup![]() |
Writeup from MB 99:
Northwest Africa 6164 (NWA 6164) (Northwest Africa) Purchased: Dec 2007 Classification: Iron meteorite (IAB-MG) History: A single iron mass was purchased from a Moroccan dealer in December, 2007, by M. Graul. Physical characteristics: The 726 g mass, measuring 88× 70 × 55 mm, has an irregular shape. The portion of the surface originally sitting in the soil is partially covered with light-brown caliche, whereas the remaining portion is glossy dark-brown due to polishing by wind-driven sand. No fusion crust is preserved. Petrography: (M. D’Orazio, DST-PI) Etched sections show a coarse Widmanstätten pattern with kamacite lamellae (bandwidth = 1.6 ± 0.2 mm) and comb-net plessite fields in approximately 9:1 volumetric ratio. The heat-affected rim (≤1.5 mm) is partially preserved. Kamacite lamellae show abundant Neumann bands and host crystals of cohenite (up to 4 mm in length) with inclusions of schreibersite and taenite. Geochemistry: Composition of the metal (ICP-MS; D’Orazio and Folco, 2003) is Co = 0.502, Ni = 7.01 (both in wt%), Cu = 122, Ga = 74, Ge = 281, As = 14.9, W = 1.23, Re = 0.205, Ir = 1.99, Pt = 5.8, Au = 1.49 (all in ppm). Classification: Iron meteorite (IAB, main group), coarse octahedrite. Specimens: Two etched full slices (12.8 and 7.6 g) and one etched endcut (7.7 g) are on deposit at DST-PI. M. Graul holds the main mass. | ||||||||||||||||||||
Bibliography: |
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Data from: MB99 Table 0 Line 0: |
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Institutions and collections |
DST-PI: Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy (institutional address; updated 17 Oct 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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Photos: |
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |