• Toronto, a new Canadian meteorite

      Kissin, S. A.; Wilson, G. C. (The Meteoritical Society, 2006-01-01)
      A specimen easily identified as an iron meteorite was first authenticated at the University of Toronto. Although the finder, Karl Heinz, is deceased, it is believed that the meteorite was found on a canoe trip in the Province of Québec. The 2.715 kg main mass is weathered and has no preserved heat-affected zone, although the external shape has a suggestion of regmaglypts, providing evidence that the specimen is a new find. The meteorite is a coarse octahedrite, with kamacite bandwidth 1.64 +/- 0.56 mm. Neutron activation analysis yielded Ni 70.4 mg/g, Ge 372 micrograms/g, Ga 87 micrograms/g, and Ir 2.55 micrograms/g, clearly indicating that it is a member of group IAB with composition similar to that of Canyon Diablo. However, of 13 minor and trace elements, As, Au, Ir, Pt, Re, and Sb are more than three standard deviations from well-established Canyon Diablo means, and Ge differs by nearly three standard deviations. The meteorite thus appears to be a new find. The name is in recognition of the University of Toronto, where the meteorite was first examined.
    • Abstracts

      The Meteoritical Society, 2006-01-01
    • Shişr 043 (IIIAB medium octahedrite): The first iron meteorite from the Oman desert

      Al-Kathiri, A.; Hofmann, B. A.; Gnos, E.; Eugster, O.; Welten, K. C.; Krähenbühl, U. (The Meteoritical Society, 2006-01-01)
      The iron meteorite Shişr 043 is a single mass of 8267 g found in the south Oman desert 42 km NE of the Shişr village. It is the first iron identified among the >1400 individual meteorites reported from Oman. The meteorite is a slightly elongated mass showing only minor rusting, a partially smooth and partially rough surface with octahedral cleavage, and a partially preserved metallic fusion crust typically 0.75 mm thick. The undeformed Widmanstätten pattern with a mean kamacite bandwidth of 1.0 +/- 0.1 mm (n = 97) indicates structural classification as a medium octahedrite. From the bulk composition, Ni = 8.06 wt%, Ga = 18.8 ppm, Ge = 37.25 ppm, and Ir = 3.92 ppm, the meteorite is classified as IIIAB, the most common group of iron meteorites. The cosmic-ray exposure (CRE) age based on 3He, 21Ne, 38Ar concentrations and 10Be-21Ne, 26Al-21Ne, and 36Cl-36Ar ratios is 290 +/- 20 Ma. This age falls within the range observed for type IIIAB iron meteorites, but does not coincide with the main cluster. The cosmogenic noble gas and radionuclide data indicate that Shişr 043 had a relatively small preatmospheric mass. The low degree of weathering is consistent with a young terrestrial age of <10,000 years based on the saturated 41Ca concentration. Shişr 043 is not paired with any of the other eight known iron meteorites from the Arabian Peninsula.
    • The fall of Hoima, an H6 chondrite from Uganda

      Greshake, A.; Reimold, W. U.; Tuhumwire, J. T.; Baguma, Z.; De Villiers, M. E. (The Meteoritical Society, 2006-01-01)
      The Hoima meteorite fell on March 30, 2003, in the Hoima district near Butema, Uganda. According to its mineralogy, texture, and mineral chemical characteristics, Hoima is classified as a brecciated H6 ordinary chondrite of shock stage S2 and weathering grade W0. After the meteorites Maziba, Soroti, Awere, and Mbale, Hoima represents the fifth meteorite recorded from Uganda.
    • The Benguerir meteorite: Report and description of a new Moroccan fall

      Chennaoui Aoudjehane, H.; Jambon, A.; Bourot Denise, M.; Rochette, P. (The Meteoritical Society, 2006-01-01)
      A meteorite fall was witnessed on November 22, 2004, at 11:45 A.M. (GMT) near the city of Benguerir, Morocco. This is one of the first falls from Morocco to be scientifically described. The total mass of the fall is estimated to be at least 40 and 80 kg. Three impact locations have been identified, two of them in soft ploughed ground and a third on a granite surface, which was apparently broken by the impact. The weight of complete pieces range between approximately 100 g and 10 kg. We have classified the stone as an LL6 ordinary chondrite, based on mineralogy and petrology, with shock grade S3 and alteration W0. The dark fusion crust is perfectly fresh, and a number of samples were collected shortly after the fall by local residents and authorities before rainfall, which occurred a few days later. We show that the magnetic susceptibility of Benguerir is homogeneously high, indicating a constant metal content despite brecciation, in the high range for LL6. The LL6 classification can also be confirmed magnetically, with a specific signature similar to other measured LL6 falls.
    • Desert Meteorites Workshop: Abstracts

      The Meteoritical Society, 2006-01-01
    • 2006 Nier Prize for Matthieu Gounelle

      Meibom, Anders (The Meteoritical Society, 2006-01-01)
    • 2006 Service Award for Jörn Koblitz

      Schlüter, Jochen (The Meteoritical Society, 2006-01-01)
    • 2006 Leonard Medal for Michael J. Gaffey

      McCoy, Timothy J. (The Meteoritical Society, 2006-01-01)
    • 2006 Barringer Medal for Robert M. Schmidt

      Melosh, H. J. (The Meteoritical Society, 2006-01-01)