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Plateau du Tademait 008
Basic information Name: Plateau du Tademait 008
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 2.4 kg
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 289 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 11 Feb 2023
Writeup from MB 112:

Plateau du Tademait 008        28°55’03.8"N, 0°59’05.6"E

Adrar, Algeria

Purchased: 2022

Classification: Martian meteorite (Shergottite)

History: Purchased from Algerian dealer Ali Mftah Mftah by Mark Lyon in 2022.

Physical characteristics: Single stone with patches of black fusion crust, sandblasted surfaces show exposed olivine phenocrysts. A polished slice reveals numerous pale green olivine phenocrysts up to ~1 cm in diameter that poikilitically enclose smaller pyroxene grains. The groundmass consists of dark gray pyroxene grains up to 500 μm and smaller olivine grains.

Petrography: (C. Agee, UNM) This meteorite has the approximate modal abundances: 50% clinopyroxene, 25% olivine, 10% maskelynite, with accessory ilmenite, chromite, Ti-Cr spinel, and pyrite. Clinopyroxene shows a tightly bound, continuous calcium enrichment trend. Olivine phenocrysts show a narrow compositional range from low Ca-pyroxene to pigeonite to subcalcic augite. Maskelynite is usually observed occupying pyroxene and olivine grain boundary pockets. Small vesicles are scattered throughout.

Geochemistry: (M. Spilde, UNM) Olivine Fa40.4±0.9, Fe/Mn=50±2, CaO=0.25±0.05, (wt%), n=6; clinopyroxene Fs26.3±4.6Wo17.6±9.2, Fe/Mn=29±2, n=12; maskelynite An51.0±3.2Ab47.2±3.4Or1.8±0.5, n=7.

Classification: Martian shergottite (olivine-phyric basalt).

Specimens: 45 g on deposit at UNM, Mark Lyon holds the main mass

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2022
Mass (g):2.4 kg
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):40.4±0.9
Ferrosilite (mol%):26.3±4.6
Wollastonite (mol%):17.6±9.2
Classifier:C. Agee, UNM
Type spec mass (g):45
Type spec location:UNM
Main mass:Mark Lyon
Comments:Fieldname ML-44; submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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     Recommended::   (28° 55' 4"N, 0° 59' 6"E)

     This is 1 of 187 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1270 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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