2019 Volume 70 Issue 5 Pages 357-372
U–Pb ages of detrital zircon from sandstone samples from the Jurassic accretionary complex in the southwestern margin of the North Kitakami Belt in the Sotoyama District, Iwate Prefecture, were examined in this study. Four samples were collected at four locations from the boundary area between the North Kitakami and Nedamo belts to the northeastward: the Tatezawa, Yonaigawa, Okawa and Mukaizawa samples, respectively.
Zircon from the Tatezawa and Yonaigawa samples shows youngest cluster ages of c.a. 190 Ma, and these sandstone samples probably deposit in the Early Jurassic. Zircon from the Okawa Sample shows a youngest cluster age of c.a. 260 Ma, and this sandstone sample probably deposit in the Late Permian, Late Triassic or Early Jurassic. Zircon from the Mukaizawa Sample shows a youngest cluster age of c.a. 170 Ma, and this sandstone sample probably deposit in the Middle Jurassic.
