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THE CHEMICAL COMPOSITIONS OF THE STONE METEORITES YAMATO (a), (b), (c) and (d), AND NUMAKAÍ
Author(s) -
Shima Masako
Publication year - 1974
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1974.tb00067.x
Subject(s) - chondrite , meteorite , enstatite , achondrite , geology , carbonaceous chondrite , geochemistry , ordinary chondrite , chemical composition , mineralogy , astrobiology , chemistry , physics , organic chemistry
The stone meteorites Yamato (a), (b), (c) and (d) were found in Antarctica in 1969, and the chondrite Numakai was seen to fall in Hokkaido, Japan, in 1925. The chemical compositions of these meteorites have been determined by classical and instrumental methods. With the help of the stepwise fractional dissolution method the chemical composition confirmed the author's previous classification of Yamato (a), (b), (c) and (d) as enstatite chondrite, Ca‐poor achondrite, type III carbonaceous chondrite and H‐group chondrite, respectively. Numakai is classified as an H‐group olivine‐bronzite chondrite. The distribution of the major elements in each phase of these chondrites is discussed.