Work

Detrital zircon U–Pb dates from the Sawando Complex of the Mino Terrane in the Takane area, Gifu Prefecture, Japan

Year: 2025

Type: article

Abstract: To increase the number of radiometric dates of Jurassic accretionary complexes in Japan, we conducted zircon U–Pb dating of a sandstone sample from the Sawando Complex in the eastern Mino Terrane using a multi-collector inductively coupled plasma mass spectrometer coupled with a multi-spot femtosecond laser ablation system (msfsLA-MC-ICP-MS). Thirty two concordant dates from 72 analyzed grains are divided into seven groups: 1920–1850 Ma (Paleoproterozoic), 1110 Ma (Mesoproterozoic), 492 Ma (Cambrian), 442 Ma (Silurian), 262–260 Ma (Permian), 250–218 Ma (Triassic), and 186–168 Ma (Jurassic). The youngest single grain date (YSG) is 168.0±6.9 Ma (±2σ). The YSG is within uncertainty of radiolarian ages reported in previous studies (late Callovian to middle Oxfordian).

Source: The Journal of the Geological Society of Japan

DOI: 10.5575/geosoc.2024.0035

Authors: Hiroaki Hakoiwa, Raiki Yamada, Mitsuhiro Nagata, Yasuhiro Ogita, Masakazu Niwa

Institutions: Japan Atomic Energy Agency, Niigata University, Nihon University

Language: English

Topic: Geological and Geochemical Analysis

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W4408880826

FWCI:

Cites: 14

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Related to: 10