Research Project
Grant-in-Aid for Scientific Research (B)
In order to establish high-resolution international Cretaceous chronostratigraphic framework, we studied 206Pb/238U zircon geochronology of the 30 tuff beds that occur in the Yezo Group, Hokkaido, Japan. The 206Pb/238U ages of tuffs in the Yezo Group show that Aptian-Campanian interval ranges from 120 to 84 million years ago. Furthermore, we extracted apatite phenocrysts from the tuff beds, and analyzed trace element chemistry of the apatites. Based on the contents of magnesium and chlorine in the apatites of the tuffs in the Yezo Group, we found four tuff beds that are traceable throughout Hokkaido.
All 2016 2015 2014 2013 Other
All Int'l Joint Research (2 results) Journal Article (12 results) (of which Int'l Joint Research: 3 results, Peer Reviewed: 12 results, Acknowledgement Compliant: 2 results, Open Access: 1 results) Presentation (33 results) (of which Invited: 2 results)
東北大学総合学術博物館紀要
Volume: 15 Pages: 109-125
120006878911
Neues Jahrbuch fur Geologie und Palaeontologie
Volume: 275 Issue: 1 Pages: 115-123
10.1127/njgpa/2015/0456
Marine Micropaleontology
Volume: 118 Pages: 17-33
10.1016/j.marmicro.2015.05.001
Earth Planetary Science Letters
Volume: 428 Pages: 204-216
10.1016/j.epsl.2015.07.020
Newsletters on Stratigraphy
Volume: 47 Issue: 1 Pages: 107-130
10.1127/0078-0421/2014/0044
Journal of Micropaleontology
Volume: 33 Issue: 2 Pages: 205-222
10.1144/jmpaleo2013-012
Palaeogeography, Palaeoclimatology, Palaeoecology
Volume: in press Pages: 30-43
10.1016/j.palaeo.2014.03.021
Palaeoclimatology, Palaeoecology
Volume: 396 Pages: 26-40
10.1016/j.palaeo.2013.12.036
Volume: 106 Pages: 1-9
Sedimentery Geology
Volume: 300 Pages: 28-48
10.1016/j.sedgeo.2013.10.009
10.1016/j.marmicro.2013.11.002
日本地質学会第120年学術大会巡検案内書・地質学雑誌(CD-ROM)
Volume: 119 Pages: 82-95
130003391965