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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 216 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:

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

Statistics:
     This is 1 of 9 approved meteorites from Gao, Mali (plus 1 unapproved name)
     This is 1 of 54 approved meteorites from Mali (plus 1 unapproved name)
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