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Assamakka 002
Basic information Name: Assamakka 002
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2018
Country: Niger
Mass:help 7.51 kg
Recommended:  Iron, IIIAB    [explanation]

This is 1 of 336 approved meteorites classified as Iron, IIIAB.   [show all]
Search for other: IIIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 19 Dec 2021
Writeup from MB 110:

Assamakka 002        19°22.167’N, 5°33.717’E

Agadez, Niger

Find: 2018

Classification: Iron meteorite (IIIAB)

History: Found by Mohlach Ahbsan in 2018 in a dune field near Assamakka.

Physical characteristics: The approximately 25 × 15 × 10 cm mass is characterized by a dark brown surface, and several areas where the surface appears to parallel the crystallographic angles within the octahedral structure. Significant terrestrial alteration is evident.

Petrography: (C. Herd and P. Hill, UAb) Petrographic investigation of a 1.5 × 1.5 cm polished and etched surface reveals a well-developed Widmanstaetten pattern with kamacite bandwidth 0.9±0.1 mm (n=7). No inclusions were observed. The exterior has been heavily weathered.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd, P. Hill, and S. DuFrane UAb): Ni = 6.3, Co = 0.42 (both wt%); Ir = 10.9, Ga = 15, Ge = 30, As = 3.2, Sb = 0.09, Ru = 11.5, Re = 1.02, Os = 9.0, W = 0.6, Pt = 13.9, Cu = 137 (all μg/g).

Classification: (C. Herd, UAb): IIIAB iron, medium octahedrite. May be a low-Ni member of the IIIAB group. Alternatively, the bulk composition may have been affected by terrestrial alteration.

Specimens: Type specimen consisting of a 9.36 g slice and a 86.4 g representative specimen at UAb. Main mass with MtMorgan.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:dune field
Mass (g):7510
Class:Iron, IIIAB
Weathering grade:high
Classifier:C. Herd, UAb
Type spec mass (g):95.7
Type spec location:UAb
Main mass:Matt Morgan
Comments:Submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
MtMorgan: Matt Morgan, Mile High Meteorites, P.O. Box 151293, Lakewood, CO 80215-9293, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     Recommended::   (19° 22' 10"N, 5° 33' 43"E)

     This is 1 of 51 approved meteorites from Agadez, Niger
     This is 1 of 97 approved meteorites from Niger (plus 5 unapproved names)
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