Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1978-02-01 |
タイトル |
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言語 |
en |
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タイトル |
Mineralogical and Petrographical Studies of the Yamato Meteorites, Yamato-7301(j), -7305(k), -7308(l) and -7303(m) from Antarctica |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
著者名(英) |
Yagi, Kenzo
Lovering, J.F.
Shima, Makoto
Okada, Akihiko
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著者所属(英) |
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en |
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Department of Geology and Mineralogy, Faculty of Science, Hokkaido University/Melbourne University/The Institute of Physical and Chemical Research/The Institute of Physical and Chemical Research |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
In 1973,the 14th Japanese Antarctic Research Expedition party collected twelve meteoritic stones in the bare ice field near the Yamato Mountains, Antarctica. Four of the stones were named Yamato-7301,-7305,-7308 and -7303. Yamato-7301,-7305 and -7303 are ordinary chondrites and are classified respectively as H4,L5 and L5 chondrites, while Yamato-7308 is a howardite. Yamato-7301,-7305 and -7303 are composed chiefly of olivine ((Fo)_<75-80>) and orthopyroxene ((En)_<75-83>), with subordinate amounts of clinopyroxene, plagioclase and phosphate minerals. Opaque minerals, nickel-iron, troilite and chromite, are more abundant in Yamato-7301 than in Yamato-7305 and -7303. Yamato-7308 is composed mainly of pyroxene and plagioclase (anorthite), with olivine, silica minerals, opaque minerals and glassy material in minor amounts. The composition of orthopyroxene is variable ranging from (En)_<80> to (En)_<37>, and also clinopyroxene varies considerably in composition. The result suggests that Yamato-7308 originated from the fractional crystallization of the parent magma of the achondrite. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00733561 |
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue
巻 8,
p. 121-141,
発行日 1978-02
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