Miocene Onnagawa Formation Zircon U-Pb Age Data from Yashima, Japan

Zircon U-Pb isotopic age data for the Miocene Onnagawa Formation in the Yashima Area, Akita Prefecture, Northeast Japan. The dataset includes concordia diagrams, photographs of zircon grains, and operational analysis details. It was authored by Takeshi Nakajima and last updated on 2026-05-19.

Use Cases

• Calibrating the depositional age of the Miocene Onnagawa Formation based on zircon U-Pb dates.
• Assessing zircon crystal morphology and discordance patterns based on the provided grain photographs and isotopic data.
• Replicating or comparing LA-ICP-MS analytical methods based on the detailed instrumentation and operational conditions.

Strengths

• Includes raw isotopic data with discordance calculations for individual zircon crystals.
• Provides visual documentation with photographs of analyzed zircon grains.
• Specifies detailed LA-ICP-MS instrumentation and operational conditions.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic bias inherent to the single Yashima Area study site.

Provenance

Source

figshare, authored by Takeshi Nakajima.

Collection Method

Data likely gathered via LA-ICP-MS analysis of zircon crystals from rock samples.

Time Range

Miocene epoch.

Freshness

Last updated 2026-05-19 08:26:33; freshness should be verified.

Geography

Yashima Area, Akita Prefecture, Northeast Japan.