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Et Tamat 001
Basic information Name: Et Tamat 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2021
Country: Mali
Mass:help 1200 g
Classification
  history:
Recommended:  Mesosiderite    [explanation]

This is 1 of 234 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 23 May 2021
Writeuphelp
Writeup from MB 110:

Et Tamat 001        17°59’06.0’’N, 0°01’12.0’’W

Gao, Mali

Find: 2021 Jan

Classification: Mesosiderite

History: The meteorite was found January 2021 in the Arkach region, eastern Mali, and subsequently purchased by the main mass holders from a local meteorite dealer.

Physical characteristics: Many dark-brownish fragments without fusion crust.

Petrography: The meteorite displays a dark brownish to reddish interior and is composed of silicate (about 50 vol%) and heavily altered metallic (about 50 vol%) portions. The silica fraction is predominantly composed of up to 3 mm sized mostly compositionally zoned low-Ca pyroxene and calcic plagioclase. Ca-pyroxene is present as blebby and lamellar exsolutions in low-Ca pyroxene. Minor phases are silica, Ti-chromite, FeS, and Mg-merrillite. The metallic lithology consists mostly of Fe-oxides and hydroxides; only some some taenite grains have been preserved. No olivine has been detected in the section studied.

Geochemistry: zoned low-Ca pyroxene: Fs29.7±2.5Wo3.8±0.5 (Fs24.4-32.4Wo2.8-4.5, FeO/MnO=19-28, n=17); augite exsolutions: Fs15.0±0.4Wo40.7±0.8 (Fs16.0-16.8Wo39.2-41.4, FeO/MnO=16-18, n=5); calcic plagioclase: An94.3±0.3 (An93.8-94.6, n=8)

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Gao
Place of purchase:Mali
Date:2021 Jan
Latitude:17°59'06.0''N
Longitude:0°01'12.0''W
Mass (g):1200
Pieces:many
Class:Mesosiderite
Shock stage:S1
Weathering grade:W4
Ferrosilite (mol%):29.7; 25.0
Wollastonite (mol%):3.8; 40.7
Classifier:A. Greshake, MNB
Type spec mass (g):29.5
Type spec location:MNB
Main mass:Chnaoui larbi and Essbiti zaid
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
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:

Mali
Coordinates:
     Recommended::   (17° 59' 6"N, 0° 1' 12"W)

Statistics:
     This is 1 of 18 approved meteorites from Gao, Mali (plus 1 unapproved name)
     This is 1 of 79 approved meteorites from Mali (plus 2 unapproved names)
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