DAR AL GANI 084


Ureilite
Monomict/Unbrecciated
Olivine–pigeonite

standby for dar al gani 084 photo
Found 1995
27° 02.44' N., 16° 24.26' E.

Two paired stones of this ureilite were found on the Dar al Gani plateau in the Sahara Desert, which have a total weight of 277 g. They are highly shocked with mosaicism of olivine and are weathered to grade W3. DaG 084 belongs to Berkley's fayalite-rich subgroup I, having a Mg# in the range of Fo76–87. This brecciated meteorite is probably paired with DaG 164 (57 g) and DaG 165 (32 g), and possibly with numerous other monomict and polymict named masses that were found in close proximity. All of these individual stones might represent the breakup of a >7 kg polymict ureilite regolith fragment (Downes et al., 2010). A Mn–Cr isotopic study was conducted by Shukolykov and Lugmair (2006) on the possibly paired polymict ureilite DaG 165 and some others. The results indicated that DaG 165 last equilibrated very early in Solar System history (~4.562 b.y. ago), much earlier than for Kenna.

Current theories of ureilite formation are presented on the Kenna page. The photo above shows the cut face of this 15.6 g DaG 084 specimen. The photo below shows the outer surface where remnant crust has been blackened by desert varnish, and light-colored desert soil still adheres to the part of the stone that lay beneath the surface.

standby for dar al gani 084 photo


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