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The Tamdakht meteorite fell near Ouarzazate, Morocco on 20 December 2008 producing a strewn field of approximately 25 kilometres (16 mi) by 2 kilometres (1.2 mi) and two small impact craters, one of about 1.1 metres (3 ft 7 in) diameter and 70 centimetres (28 in) depth at 31°09.8′N 7°00.9′W and the other of about 20 centimetres (7.9 in) diameter and 10 centimetres (3.9 in) depth at 31°09.9′N 07°02.3′W.[1]

Tamdakht meteorite
TypeOrdinary chondrite[1]
ClassH5
Shock stageS3
Weathering gradeW0
CountryMorocco
RegionOuarzazate
Coordinates31°09.8′N 7°00.9′W
Observed fallYes
Fall date2008-12-20
Found date2009-01-03 ff
TKW~100 kilograms (220 lb)
Strewn fieldYes

The meteorite is named after a village close to the fall.[2]

On April 22, 2017 small bits of the meteorite were handed out to children at the Boston March for Science.


Mineralogy


Petrology: (by Albert Jambon, Omar Boudouma, D. Badia UPVI and M. Denise, MNHNP[1]): Abundant chondrules with visible but not well-delimited outlines. Chondrule size is 0.1 to 1.5 mm. Dominant olivine and orthopyroxene. Abundant chromite, rare clinopyroxene and ilmenite. Numerous pockets with chromite, plagioclase and phosphate (merrilite and Cl-apatite). Kamacite, with deformed Neumann bands, and taenite, twinned troilite. Copper. Mode: metal+troilite 10%.

Mineral compositions and geochemistry:[1] log χ = 5.3. Olivine Fa18 ± 0.5 Opx = En83 Fs16 Wo2 Minor calcic pyroxene. Plagioclase is Ab83–86 An5–15 Or7–2. Ca-phosphate (merrillite and Cl-apatite). Chromite: Cr# (100× molar Cr/[Cr + Al]) = 82. Metal: kamacite with 5% Ni and taenite with 36–47% Ni. Oxygen isotopes (C. Suavet, J. Gattacecca CEREGE): δ17O = 3.26‰, δ18O = 5.01‰, and Δ17O = 0.65‰. Magnetic susceptibility is log χ = 5.3 × 10–9 m3/kg.


Classification


Ordinary chondrite (H5), S3, W0.[1]


Other



See also



References


  1. "Tamdakht". Meteoritical Bulletin Database. Meteoritical Society. Retrieved 22 December 2012.
  2. THOMAS, Philippe. "Tamdakht". METEORITICA. Retrieved 22 December 2012.
  3. "Silver Half Ounce 2016 Tamdakht Meteorite Strike, Coin from Cook Islands". Online Coin Club. Retrieved 14 May 2022.

See also



На других языках


[de] Tamdakht (Meteorit)

Tamdakht ist ein beobachteter Meteoritenfall vom 20. Dezember 2008, 22:37 Uhr Ortszeit nördlich der gleichnamigen Ortschaft Tamdakht in der Provinz Ouarzazate in Marokko, etwa 30 km nordwestlich der Provinzhauptstadt Ouarzazate.
- [en] Tamdakht meteorite



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