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Dayet el Aam
Basic information Name: Dayet el Aam
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2012
Country: Mauritania
Mass:help 4.98 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Iron, IIAB
Recommended:  Iron, IIAB    [explanation]

This is 1 of 138 approved meteorites classified as Iron, IIAB.   [show all]
Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 19 Apr 2016
Writeuphelp
Writeup from MB 105:

Dayet el Aam         26°44’ N, 7°58’ W

Tiris Zemmour, Mauritania

Find: 2012 Sept

Classification: Iron meteorite (IIAB)

History: One mass of 4975 g was found by nomads on Erg El Ahmar, north of Taoudenni, near the border to Algeria in September 2012. The specimen was subsequently purchased by S. Buhl and M. Jost in September 2014.

Physical characteristics: The sand-polished exterior of the compact mass shows shallow regmaglypts, moderate sand-abrasion and a gray-greenish patina.

Petrography: (C. Herd, UAb): Optical and SEM investigation a 3 × 4 cm polished and etched slice reveals kamacite crystals with grain boundaries demarcated by laths of schreibersite. Tabular inclusions of schreibersite were also observed.

Geochemistry: Bulk composition: (C. Herd and G. Chen, UAb) Ni = 57, Co = 4.6 (both mg/g); Cu = 142, Ga = 74.1, As = 5.4, W = 2.8, Ir = 7.7, Pt = 27.2, Pd = 1.6, Ru = 18.8, Re = 0.53, Au = 0.5 (all μg/g). Obtained by solution ICP-MS using North Chile (Filomena) as an internal standard.

Classification: (C. Herd, UAb): IIAB, hexahedrite.

Specimens: Type specimen of 57.7 g from which ~0.8 g of material was removed for analysis, at UAb. Main mass split between S. Buhl and M. Jost.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Tiris Zemmour
Origin or pseudonym:gravel plain
Date:2012 Sept
Latitude:26°44' N
Longitude:7°58' W
Mass (g):4975
Pieces:1
Class:Iron, IIAB
Shock stage:low
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):57.7
Type spec location:UAb
Main mass:S. Buhl (2094 g); M. Jost (2044 g)
Finder:Ait Ouzrou Mohamed
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)
Ouzrou: M. Ait Ouzrou, 29 Av Ouad Souss, Complexe Tamelalt, 8000 Agadir, Morocco (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography:

Mauritania
Coordinates:
     Recommended::   (26° 44'N, 7° 58'W)

Statistics:
     This is 1 of 9 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 103 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)
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Synonymshelp: Dayet el Aam 001 (First meteorite in DCA)

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