National Institute of Polar Research
Geological Institute, Faculty of Science, University of Tokyo
抄録(英)
Preliminary chemical analysis of Yamato-74662 meteorite suggests that this meteorite belongs to carbonaceous chondrite Type II. No other meteorites of this type have been found among Antarctic meteorites which run to about one thousand. Yamato-74662 meteorite was collected from the surface of bare ice in the Meteorite Ice Field near southern Yamato Mountains, Antarctica on December 30,1974. The bulk chemical composition of Yamato-74662 meteorite in weight % is as follows : 29.18% SiO_2,0.22% TiO_2,2.38% (Al)_2O_3,22.53% FeO, 7.38% FeS, 0.22% MnO, 19.29% MgO, 1.70% CaO, 0.28% (Na)_2O_2,0.04% K_2O, 1.56% H_2O(-), 13.26% H_2O(+), 0.23% P_2O_5,0.85% NiO, 0.52% (Cr)_2O_3,(0.05)_9% Co.
雑誌書誌ID
AA00733561
雑誌名
Memoirs of National Institute of Polar Research. Special issue
Yamato-74662 Meteorite: A Carbonaceous Chondrite Type II
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KJ00000011870
(473.2KB)
概要
