Shişr 033

Oman

Found 2002, October 25

Carbonaceous chondrite (CR)

A fragmented stone weighing 1097.7 g (5 large and many small fragments, total 65) was found by M. Hauser and L. Moser. Mineralogy and classification (E. Gnos, UBE; B. Hofmann, NMBE; A. Al-Kathiri, UBE): The average chondrule size is 1.0 mm. Chondrules include PO, POP, PP, BO, RP. The matrix/(chondrule+aggregates) ratio is 0.53. Metal-rich PO chondrules and large metal grains are common. Olivine composition varies from Fa_2.0 to Fa_7.9, the orthopyroxene from Fs_1.2-12.1Wo_0.4-3.5. The rock contains several, up to 4 mm sized, elongated fragments of a C1 clasts. These strongly deformed, phyllosilicate-rich clasts characteristically contain abundant 10-150 μm sized pyrrhotite laths and slightly smaller framboidal magnetite aggregates. Weathering grade W2, shock stage S2.