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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy >
Vol.XXI, No.3 >
Trace Element Abundances of the Late Tertiary Volcanic Rocks in Southwest Hokkaido
| Title: | Trace Element Abundances of the Late Tertiary Volcanic Rocks in Southwest Hokkaido |
| Authors: | Okamura, Satoshi Browse this author |
| Issue Date: | Aug-1985 |
| Publisher: | 北海道大学 |
| Journal Title: | 北海道大学理学部紀要 |
| Journal Title(alt): | Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy |
| Volume: | 21 |
| Issue: | 3 |
| Start Page: | 405 |
| End Page: | 416 |
| Abstract: | 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. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/36736 |
| Appears in Collections: | Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy > Vol.XXI, No.3
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