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| Assamakka | |||||||||||||||||||||||||||||
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| Basic information | Name: Assamakka This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2002 Country: Niger Mass:  4.4 kg | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 6 approved meteorites classified as Iron, IVA-an. [show all] Search for other: Iron meteorites, IVA irons, and Metal-rich meteorites | ||||||||||||||||||||||||||||
| Comments: | Approved 9 Sep 2011 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 100:
Assamakka 19°16’N, 5°55’E Agadez, Niger Found: 21 Mar 2002 Classification: Iron meteorite (IVA, anomalous) History: The meteorite was found during a trip through the Sahara close to Assamaka, Niger. Physical characteristics: One flat slightly parabolic fragment of 4400 g, with flow textures on the surface. Petrography: The meteorite displays typical Widmannstätten pattern with 0.2-0.4 mm kamacite bandwidths. Geochemistry: Composition as determined by INAA (C. Koeberl, UVien) Ni 8.81 wt%, Co 0.386 wt%, Cr 34.4 ppm, As 6.65 ppm, Ir 1.49 ppm ppm, Au 290 ppb. Classification: Iron meteorite (IVA-an, fine octahedrite). Overall the composition is consistent with the IVA class of irons except the Au is significantly too low, hence the anomalous designation. Specimens: A total of 68.1 g at MNB. Mr. Josef Geltl, Ostermünchen, Germany holds the main mass. | ||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 28: |
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| Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) UVien: University of Vienna, Althanstrasse 14, A1090 Vienna, Austria (institutional address) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:
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Statistics: This is 1 of 51 approved meteorites from Agadez, Niger This is 1 of 106 approved meteorites from Niger (plus 4 unapproved names) | ||||||||||||||||||||||||||||
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