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DHOFAR 1988 (3.261 gram)

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Category:
[ Meteoritical Bulletin Database ]

 

Classification: Carbonaceous chondrite C2, ungrouped W-low/S1
Time/Place: 2 Dec 2011 in Oman
Mass: 59g

Physical characteristics: Small almost black stone partly covered with fusion crust.

Petrography: The meteorite is a breccia displaying an dark gray to black interior. It is composed of relatively large chondrule pseudomorphs (mean 550 µm in diameter) and rare isolated mineral grains set into an abundant matrix of phyllosilicates, Ca-carbonate, and pyrrhotite. Chondrule pseudomorphs are typically surrounded by fine-grained accretionary rims. Anhydrous silicates are almost exclusively forsteritic olivine. Very rarely more Fe-rich olivine (up to Fa26) has been encountered; no pyroxene was found.

Geochemistry: Oxygen isotopes (K. Ziegler, UNM): acid-washed material analyzed in replicate by laser fluorination gave, respectively: ?18O=16.424, 21.864, 20.095; ?17O=7.032, 10.751, 9.582; ?17O= -1.64, -0.793, -1.028 (all per mil).

Classification: Oxygen isotopes plot close to Tagish Lake (C2-ungrouped), between CI and the ungrouped C2 chondrites Y86720, Y82162 and B7904.


Additional photo