Photomicrographs of zircon grains for U–Pb dating and cathodoluminescence images of the analyzed zircon grains from the northwestern part of Mihara City, Hiroshima Prefecture, south–central part of the Chugoku Region, Japan, as well as analytical conditions and results.

Version 2 2023-12-25, 09:33

Version 1 2023-12-21, 08:02

dataset

posted on 2023-12-25, 09:33 authored by Hirofumi Yamasaki, Kazuo Terada, Saito, Takeshi, Tohru Danhara, Hideki Iwano, Takafumi Hirata, Koki Hisamori, Yuji Okimura, Kenta Tsuchioka

Fig. A1. Photomicrographs of zircon grains (n = 104) obtained from fine tuff in the northwestern part of Mihara City, Hiroshima Prefecture. Grains with numbers were dated. Numbers correspond to grain numbers in Table A2. Grains circled by red squares yielded dates of 80–70 Ma.

Fig. A2.Concordia plot of data for all analyzed zircon grains (n = 32) from fine tuff in the northwestern part of Mihara City, Hiroshima Prefecture.

Fig. A3.Cathodoluminescence images of the analyzed zircon grains from fine tuff in the northwestern part of Mihara City, Hiroshima Prefecture. A, Zircon grains constituting clusters with ages of 40–30 Ma. B, Zircon grains constituting clusters with ages of 80–70 Ma. Numbers correspond to grain numbers in Table A2. Black circles correspond to ablation spots.

Table A1. Analytical conditions for the LA–ICP–MS system used in this study. *1: Sláma et al. (2008); *2: Iwano et al. (2012); *3: Iwano et al. (2013); *4: Lukács et al. (2015); *5: Wiedenbeck et al. (1995)

Table A2. Results of zircon U–Pb dating of fine tuff in the northwestern part of Mihara City, Hiroshima Prefecture.