富山県熊野川流域の手取層群の堆積年代
Year: 2025
Type: article
Abstract: A tuffaceous bed was discovered from the Tetori Group upstream of the Kumano-gawa River in the southern part of Toyama City, Toyama Prefecture. As a result of U–Pb dating of the zircon grains from a rock sample of the tuffaceous bed, we obtained the youngest cluster (weighted mean 206Pb/238U) date of 121.33 ± 0.80 Ma (2σ). This date indicates the Early Cretaceous (Late Barremian to Early Aptian) and is interpreted as the depositional age of the Tetori Group along the Kumano-gawa River.
DOI: 10.60387/0002000819
Institution: Toyama Science Museum
Language: Japanese
Subfield: Geochemistry and Petrology
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7207800083