Mount Nansen Plutonic Rock Geochronology and Pb Isotope Data

Eight new U-Pb zircon crystallization ages and Pb isotopic data for igneous feldspar from six samples in the Mount Nansen map area. The data includes ages for the Dickson Hill porphyry, Bow Creek granite, and Dawson Range granodiorite, confirming a mid-Cretaceous Whitehorse suite affinity. The dataset was published by the Government of Yukon and last updated in April 2026.

Use Cases

• Determine crystallization ages of plutonic rocks based on U-Pb zircon geochronology data
• Analyze the evolution of Pb isotopic signatures in feldspar over time
• Correlate magmatic rock ages with epithermal and porphyry deposit occurrences mentioned in the description
• Identify distinct isotopic signatures between Late Triassic-Early Jurassic and Cretaceous plutonic rocks

Strengths

• Includes eight new U-Pb zircon crystallization ages with specific error margins (e.g., 111 ± 1.8 Ma)
• Provides Pb isotopic data for igneous feldspar from six samples
• Confirms mid-Cretaceous Whitehorse suite affinity for multiple rock phases

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

Reported U-Pb zircon crystallization ages (two CA-TIMS and six LA-ICPMS) and Pb isotopic data for igneous feldspar.

Time Range

Mid-Cretaceous (e.g., 111 Ma, 107 Ma) and Late Triassic to Early Jurassic (199.06 ± 0.96 Ma)

Freshness

Last updated 2026-04-17 15:53:50.623756; freshness should be verified

Geography

Mount Nansen map area (NTS 115I/3 and part of 115I/2), Dawson Range, Yukon