Dar al Gani 1037

Libya

Found 1999

Martian meteorite (basaltic shergottite)

Ten stones totaling 4012.43 g were found early 1999 in the sand desert of Dar al Gani. The biggest individual was a complete individual of 3090 g with perfect orientation and rather fresh appearance. Classification and mineralogy (A. Greshake and M. Kurz): an olivine-phyric shergottite with porphyritic texture; large chemically zoned olivine megacrysts are set into a fine-grained groundmass composed of pyroxene and maskelynite; minor phases include chromite, Ti-rich chromite, sulfides, phosphates, and small Fe-rich olivines; olivine megacrysts often contain melt inclusions and small chromites; pyroxenes are dominantly chemically zoned pigeonites, some contain orthopyroxene cores; olivine phenocrysts, Fa_31.4-41.1, Fe/Mn = 52-59; matrix olivine, Fa_37.4-40.6, Fe/Mn = 52-58; pigeonite, Fs_23.7-35.4Wo_6-18.6; orthopyroxene, Fs_20.2-24.5Wo_2.5-4.7, Fe/Mn = 34; maskelynite, An_58.9-65.5; heavily shocked with numerous melt veins and melt pockets; moderately weathered with calcites filling cracks and cavities. Oxygen isotopes (R. Clayton and T. Mayeda, UChi): δ¹⁷O = +2.91, δ¹⁸O = +5.29, Δ¹⁷O = +0.16. Possibly paired with Dar al Gani 467, 489, 670, 735, 876, and 975. Specimens: main mass with anonymous finder; type specimen 20 g plus one polished thin section MNB