2021年12月
Two pulse intrusive events of the Pliocene Tanigawa-dake granites revealed from zircon U-Pb dating
EARTH PLANETS AND SPACE
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- 巻
- 73
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1186/s40623-021-01556-4
- 出版者・発行元
- SPRINGER
We performed zircon U-Pb dating on the Pliocene Tanigawa-dake granites (Makihata and Tanigawa bodies) and the Cretaceous Minakami quartzdiorite, Northeast Japan Arc. Concordia ages were estimated to be 3.95 +/- 0.11 Ma (+/- 2 sigma) for the Makihata body, 3.18 +/- 0.13 Ma and 3.32 +/- 0.15 Ma for the Tanigawa body, and 109.4 +/- 2.2 Ma for the Minakami quartzdiorite. The Minakami quartzdiorite is possibly correlated to the bedrock in the Ashio belt because the age of the Minakami quartzdiorite is consistent with the zircon U-Pb ages of the earliest Tadamigawa granites (107-62 Ma) which are distributed to the northeast of the Tanigawa-dake region and belong to the Ashio belt. All the zircon U-Pb ages of the Tanigawa-dake granites are older than the previously reported cooling ages, i.e., K-Ar ages and zircon fission-track ages, being consistent with their difference in closure temperature. On the basis of these results, we concluded that the intrusive ages of the Tanigawa-dake granites are similar to 4-3 Ma, which are among the youngest exposed plutons on Earth. The U-Pb ages of the Makihata body and the Tanigawa body are different significantly in the 2 sigma error range. Thus, the Tanigawa body intruded later than the Makihata body by similar to 0.7 Myr.
- リンク情報
- ID情報
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- DOI : 10.1186/s40623-021-01556-4
- eISSN : 1880-5981
- Web of Science ID : WOS:000730973600001