Uranium-Lead Ages for Cassiar and Seagull Batholiths in Yukon

Two samples from the Cassiar batholith yield overlapping U-Pb ages of 112.3 ± 2.0 Ma and 113.2 ± 2.2 Ma, while two samples from the Seagull batholith give younger ages of 99.3 ± 2.2 Ma and 95.7 ± 2.1 Ma. This dataset contains uranium-lead isotopic dates for granitic intrusions in southern Yukon, collected by the Government of Yukon. The data was last updated on April 17, 2026.

Use Cases

• Compare isotopic dating methods (ID-TIMS vs LA-ICP-MS) based on the described age results
• Analyze the age difference between post-tectonic intrusions based on the ~100 Ma vs ~110 Ma age ranges
• Study the composition range from granodiorite to granite based on the description of the batholiths
• Investigate the relationship between intrusion age and structural features based on the foliated augen gneiss sample

Strengths

• Specific age results with error margins are provided for four samples
• Data originates from a governmental geological organization
• Two distinct isotopic dating methods (ID-TIMS and LA-ICP-MS) are described

Limitations

• Row count and column-level documentation are unknown
• The dataset description is technical but lacks explicit data structure details
• Data may reflect geographic bias inherent to the specific map area studied

Provenance

Source

Government of Yukon

Collection Method

Isotopic dating via ID-TIMS and LA-ICP-MS methods on rock samples

Time Range

Mesozoic (~95-113 million years ago)

Freshness

Last updated 2026-04-17 15:41:13.428791

Geography

Cassiar and Seagull batholiths, Wolf Lake map area, southern Yukon near the British Columbia-Yukon boundary