Trace Element Abundances of the Late Tertiary Volcanic Rocks in Southwest Hokkaido

Okamura, Satoshi

北海道大学理学部紀要, 1985, 21(3), 405-416

Permalink : https://hdl.handle.net/2115/36736

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アクセス権	open access
URI	https://hdl.handle.net/2115/36736
タイトル	Trace Element Abundances of the Late Tertiary Volcanic Rocks in Southwest Hokkaido
著者	著者名 Okamura, Satoshi
言語	英語
発行日	1985-08
出版者	北海道大学
出版者	Hokkaido University
収録物名	北海道大学理学部紀要
収録物名	Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy
巻(号)	21(3)
ページ	405-416
抄録	Abundances of trace elements including REE were determined for 22 Late Tertiary (Late Miocene to Pliocene) volcanic rocks from southwest Hokkaido. Geochemical features of the Late Tertiary volcanic rocks show that LIL elements, K2O and Th, increase at a given SiO2 content across the arc from the Pacific to the Japan Sea side, being similarly to those of the Quaternary volcanic rocks in the same region. However, the Late Tertiary volcanic rocks are higher in Hf/Yb ratios than the Quaternary rocks. This geochemical feature suggests that the former rocks may have derived from a more enriched source mantle than the source material of the latter ones.
資源タイプ	紀要論文
出版タイプ	Version of Record
PISSN	0018-3474