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Assamakka
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:help 4.4 kg
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Iron, IVA-an 
Recommended:  Iron, IVA-an    [explanation]

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
Writeuphelp
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:
State/Prov/County:Agadez
Date:21 Mar 2002
Latitude:19°16'N
Longitude:5°55'E
Mass (g):4400
Pieces:1
Class:Iron, IVA-an
Weathering grade:moderate
Classifier:A. Greshake and C. Koeberl
Type spec mass (g):68.1
Type spec location:MNB
Main mass:Josef Geltl, Ostermünchen, Germany
Finder:Josef Geltl, Ostermünchen, Germeny
Comments:Submitted by Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
UVien: University of Vienna, Althanstrasse 14, A1090 Vienna, Austria (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Geography:

Niger
Coordinates:
     Recommended::   (19° 16'N, 5° 55'E)

Statistics:
     This is 1 of 47 approved meteorites from Agadez, Niger
     This is 1 of 59 approved meteorites from Niger (plus 3 unapproved names)
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