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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
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  Iron, IIIAB
Recommended:  Iron, IIIAB    [explanation]

This is 1 of 341 approved meteorites classified as Iron, IIIAB.   [show all]
Search for other: IIIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 19 Dec 2021
Writeuphelp
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:
  MB110
  Table 0
  Line 0:
State/Prov/County:Agadez
Origin or pseudonym:dune field
Date:2018
Latitude:19°22.167'N
Longitude:5°33.717'E
Mass (g):7510
Pieces:1
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
Institutions
   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)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:

Niger
Coordinates:
     Recommended::   (19° 22' 10"N, 5° 33' 43"E)

Statistics:
     This is 1 of 54 approved meteorites from Agadez, Niger
     This is 1 of 119 approved meteorites from Niger (plus 4 unapproved names)
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