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


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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/36713

Title:	Rb-Sr Age of the Yurappu-dake Plutonic Complex in Southwestern Hokkaido
Authors:	Nishikawa, Jun'ichi Browse this author
Authors:	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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