The search for Antarctic meteorites

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Antarctic Regions, Ice Environments, Meteorites, Chondrites, Iron Meteorites, Stony Meteorites, Ureilites, Graphite, Magnetite, Polar Regions, Contamination, Meteorites, Origin, Antarctic Meteorites, Allan Hills Meteorites, Discovery, Yamato Meteorites, Transport, Erosion, Ablation, Fragments, Classification, Photographs, Sampling Techniques, Carbonaceous Chondrites, Amino Acids, Diamonds, Ice, Stony Meteorites, Iron Meteorites, Samples, Meteorite, Ureilites, Ages, Shergottites, Ordinary Chondrites, Feature

Scientific paper

The history and results of searches for meteorites on and within the Antarctic ice are outlined. The initial discovery of stony meteorites in the Yamato mountains in 1969 and subsequent searches yielding hundreds of meteorites are considered, along with the results of searches on the other side of the continent which produced finds near Mount Baldr in the Transantarctic range and the Allan Hills beginning in 1976. The accepted mechanism for the concentration of Antarctic meteorites near mountains as a result of the flow of ice in which they become embedded is discussed. The find of 3000 meteorite fragments in the Yamato mountains is then noted, and the significance of Antarctic meteorites for their large numbers as well as frequency of rare meteorite types, and great age is pointed out. The special handling of Antarctic meteorites, which is similar to that employed for lunar samples, occasioned by their extraordinary clean environmental circumstances, is described. The rare types of meteorites found in Antarctica are then discussed, including amino-acid-bearing carbonaceous chondrites, diamond-bearing iron meteorites, ureilites, shergottites, and ordinary chondrites containing graphite and magnetite. The continuation of Antarctic searches and the initiation of searches at the north pole are also noted.

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