Late Cambrian and Ordovician Alkaline Magmatism Along Dawson Fault, Yukon

Zircon U-Pb dates ranging from 501.98 ± 0.17 Ma to 497.57 ± 0.70 Ma support the Dawson fault's activity as a rift-transfer structure. This dataset likely contains geochronological, paleontological, and petrological results from Upper Ordovician rocks indicating localized basin development from 453 to 447 Ma. It is provided by the Government of Yukon and was last updated on April 17, 2026.

Use Cases

• Modeling rift-transfer fault reactivation based on zircon U-Pb dates
• Analyzing post-rift magmatism patterns based on Upper Ordovician volcanic and plutonic rock data
• Investigating mantle decompression partial melting triggers based on alkaline mafic volcanic rock evidence
• Studying continental breakup timing based on sub-Jiangshanian unconformity data

Strengths

• Zircon U-Pb dates are precise, ranging from 501.98 ± 0.17 Ma to 497.57 ± 0.70 Ma
• Data covers a significant time span, documenting magmatism from late Cambrian (~501 Ma) to Upper Ordovician (~447 Ma)
• Results are based on new bedrock mapping, geochronological, paleontological, and petrological methods

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment

Provenance

Source

Government of Yukon

Collection Method

New bedrock mapping, geochronological, paleontological, and petrological results

Time Range

Late Cambrian (~501 Ma) to Upper Ordovician (~447 Ma)

Freshness

Last updated 2026-04-17 15:55:20.331238

Geography

Dawson Fault, central Yukon, northern Canadian Cordillera