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New Mars Meteorite Found In Oman (Sayh al Uhaymir 005 & 008)


                     THE METEORITICAL BULLETIN 84-1
                            June 2, 2000
          Jeffrey N. Grossman, Editor (

           Meteoritical Bulletin, No. 84, 2000 August

Sayh al Uhaymir 005      20\26059.76'N, 57\26019.55'E
Sayh al Uhaymir 008      20\26058.83'N, 57\26019.14'E
   Found 1999 November 26
   Martian basalt (shergottite)
At two locations, 1864 m apart, 5 grey-greenish stones were found which
are macroscopically identical. Sayh al Uhaymir (SaU) 005 comprises one
fragment of 547 g and two individuals of 561g and 236g,  which are
partially covered by fusion crust and show regmaglyptes. SaU 008
comprises one large individual of 7805 g and a smaller fragmented
individual of 774 g. On the latter, the fresh black fusion crust is
almost completely preserved. The total mass of SaU 005/008 is 9923 g.
Mineralogy and classification (J. Zipfel, MPI): porphyritic texture
with large olivine phenocrysts (Fo64-71) in a fine-grained groundmass
of pigeonite (En61-70Wo6-13) and maskelynite (An51-65Or0.3-0.9); minor
phases are augite, phosphates and opaques; strongly shocked: mosaicism
and planar deformation of olivines, twinning and fracturing of
clinopyroxene, and up to mm-sized shock melted areas with quench
textures are common; brown-orange ringlike structures formed by extremely
fine-grained intergrowths of unidentified phases are abundant in impact
melt areas and pyroxenes;. the meteorite is extremely fresh, with only
a few of the larger cracks partially filled with calcite. Bulk chemical
analyses (B. Spettel, G. Dreibus, MPI;  H. Palme, K\366ln), noble gas
analyses (M. Paetsch, L Schultz, MPI), and Sm-Nd systematics (E. Jagoutz,
MPI): texture, bulk chemistry, noble gases and Sm-Nd systematics indicate
a very close relationship to Dar al Gani 476/489/670/735; however, based
on the distinct mineral chemistry and the place of find, simple pairing
with those meteorites can be excluded. Specimens: type specimen, 60 g,
MPI; main mass with anonymous finder.

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