Fig. 13

Probability density plot based on a complication of U–Pb ages from detrital zircons in the Sanbagawa and Northern Shimanto belts in representative literatures. The source data do not include U–Pb ages for zircon rims grown by metamorphism, all of which can be interpreted as igneous ages. The bars show the U–Pb age for each analysis. Sanbagawa: Okamoto et al. (2004), Aoki et al. (2007, 2012, 2009), Tsutsumi et al. (2009, 2012), Knittel et al. (2014), Endo et al. (2018), Jia and Takeuchi (2020), Shimanto: Aoki et al. (2012, 2015), Tokiwa et al. (2019, 2017, 2021), Shimura et al. (2017, 2020, 2021) and Jia and Takeuchi (2020)