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Vol.XX, Nos.2-3 >

Rb-Sr Age of the Yurappu-dake Plutonic Complex in Southwestern Hokkaido

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Title: Rb-Sr Age of the Yurappu-dake Plutonic Complex in Southwestern Hokkaido
Authors: Nishikawa, Jun'ichi Browse this author
Hashimoto, Masahiko Browse this author
Issue Date: Feb-1983
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: 20
Issue: 2-3
Start Page: 145
End Page: 149
Abstract: A Rb-Sr whole-rock age and two whole rock-mineral ages of the Yurappu-dake Plutonic Complex in southwestern Hokkaido were determined. The Rb-Sr whole-rock age is 115 ± 9 Ma with an initial 87Sr/86Sr ratio of 0.7057 ± 0.0001, whereas the whole rock-mineral ages are 70 ± 7 and 74 ± 3 Ma. It is suggested that the Yurappu-dake Plutonic Complex had a Sr isotopic heterogeneity when the whole-rock system was closed.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/36713
Appears in Collections:Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy > Vol.XX, Nos.2-3

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