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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
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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. 

Funding

Cultivating evaluation capability of scientific logicality via inquiry learning

Japan Society for the Promotion of Science

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Cross-curricular Secondary Science Learning Contexts Based on Systems Thinking: Focusing on the Earth Domain

Japan Society for the Promotion of Science

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Development and practical verification of science learning advanced program based on network construction of inquiry

Japan Society for the Promotion of Science

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History

Corresponding author email address

hnmn@hiroshima-u.ac.jp

Manuscript title (in Japanese)

中国地方中南部,広島県三原市北西部の古第三系: 岩相と挟在する細粒凝灰 岩のジルコンU–Pb 年代

Authors (in Japanese)

山崎博史,寺田和雄,齊藤 毅,檀原 徹,岩野英樹,平田岳史,久森洸希,沖村雄二,土岡健太

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© 2023 The Geological Society of Japan

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