In this study, we propose a new method for elucidating zircon growth in granitic plutons, based on the variations in three-dimensional (3D) cathodoluminescence (CL) patterns, U[sbnd]Pb age, titanium concentration, and Th/U. We focused on the zirco...
Ami Yoshida   Junko Shikimori   Takeshi Ohno   Yuta Ijichi   Yusuke Fukami   Masahiro Sakata   Takafumi Hirata   
Journal of environmental radioactivity 255 107011-107011 2022年9月 [査読有り]
We examine the historical changes of 236U/238U and 235U/238U in a sediment core collected in Tokyo Bay and elucidate the anthropogenic sources of uranium in the 1960s-2000s. Uranium-236 was detected in samples deposited in the 1960s-2000s, and the...