Windy-McKinley Terrane Geochronological and Geochemical Data

New geochronological and geochemical data from the Yukon's Windy-McKinley terrane provide insights into its subdivisions. U-Pb zircon age determinations for felsic meta-volcanic rocks are Late Devonian, and for gabbro intrusions are late Middle Triassic. Trace-element data from gabbro intrusions and ophiolite components suggest magmatism occurred in supra-subduction zone settings.

Use Cases

• Correlating geological units based on U-Pb zircon age determinations
• Analyzing paleotectonic settings based on trace-element geochemical data
• Studying supra-subduction zone magmatism from gabbro and diabase samples
• Investigating terrane subdivision age and composition

Strengths

• Includes specific age determinations: Late Devonian and late Middle Triassic
• Trace-element geochemical data is provided for multiple formations
• Data substantiates correlation with a known mineral deposit district in Alaska

Limitations

• Row count and column-level documentation are unknown
• The age of the Harzburgite Peak-Eikland Mountain ophiolite is not known
• Data may reflect geographic bias inherent to the Yukon region

Provenance

Source

Government of Yukon

Time Range

Late Devonian to late Middle Triassic

Freshness

Last updated 2026-04-17 15:42:14.615940

Geography

Windy-McKinley terrane, western Yukon and correlative areas in Alaska