Abteh 001 CM2 #1- 15,6 g

Abteh 001 27°51’10.5″N, 11°52’50.4″W

South, Morocco

Find: 2023 Jun 20

Classification: Carbonaceous chondrite (CM2)

History: Found in Morocco near Chwichiya by Lahcen Ousaleh on June 06, 2023. Bought by Jean Redelsperger from Zaid Oualguirah in 2023 in Morocco.

Physical characteristics: Black stone with remanents of fusion crust. Cut surface reveals a dark fine-grained interior, with small chondrules.

Petrography: (J. Gattacceca, CEREGE) Chondrules with average apparent diameter ~200µm and chondrule fragments set in an abundant fine-grained iron-rich matrix. Opaque minerals are troilite, pyrrhotite, magnetite. Metal is found almost exclusively as inclusions in anhydrous silicates. X-ray diffraction analyses over a ~2 cm2 area on a polished section (D. Borschnek, CEREGE) reveal the presence of phyllosicilates and calcium carbonates, as typically observed in type 2 chondrites using the same experimental setup.

Geochemistry: Olivine Fa_15.1±17.0, range Fa_0.40-48.1 (n=7). Cr₂O₃ in ferroan olivine 0.40±0.18 wt% (n=6). Defocused analyses of matrix FeO 24.0±6.7 wt%, analytical total 76.1±5.0 (n=3).

Classification: Carbonaceous chondrite (CM2).

Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.