Chemical composition and rare gas content of four new detected antarctic meteorites |
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| Authors: | Makoto Shima Masako Shima H Hintenberger |
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| Institution: | Max-Planck-Institut für Chemie, Abteilung für Massenspektroskopie und Isotopenkosmologie, Mainz, FRG |
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| Abstract: | Within a region of 5 km × 10 km on a downhill slope of the Yamato Mounties, in 1969 the Japanese Expedition Team collected many stones. 9 of them were recognized as meteorites. On 4 of these findings we determined the chemical composition and the rare gas content. According to the mineralogical and the chemical composition, Yamato (a) is an enstatite chondrite, Yamato (b) a Ca-poor achondrite, Yamato (c) seems to be a carbonations chondrite Type III and Yamato (d) a olivine bronzite chondrite. Exposure ages are 1.7, 31, 25 and 4.3 my respectively. |
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