Mid-Cretaceous Magmatism Geochemistry and Isotopes in Yukon Tintina Gold Province

Geochemical and isotopic data from mid-Cretaceous magmatic rocks in the Tintina Gold Province of southeastern Yukon and southwestern Northwest Territories. The study includes 16 new U-Pb age determinations and 20 samples analyzed for Sr-Nd-Pb isotopes. It examines plutonic suites like Anvil, Tay River, Tungsten, and Tombstone to understand crustal interaction and metallogenic processes.

Use Cases

• Analyze temporal trends in REE abundance and sNd values across plutonic suites to model magma source evolution.
• Correlate lead isotope compositions (206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb) from feldspars and sulphides to trace metal deposit origins.
• Use initial Sr ratios and epsilon Nd values from 20 samples to assess continental crust interaction in magma genesis.
• Map the spatial distribution of calc-alkaline, peraluminous granodiorite intrusions against U-Pb age data to validate inboard younging patterns.

Strengths

• Includes 16 new U-Pb age determinations constraining magmatism from ~107 to ~91 Ma.
• Provides isotopic data from 20 samples for Sr, Nd, and Pb systems.
• Defines geochemical characteristics for multiple plutonic suites across a significant geographic region.

Limitations

• Sample size for isotopic analysis (n=20) is relatively small for broad regional inferences.
• Data is presented in HTML format, not a structured tabular dataset, limiting direct computational analysis.
• Focus is on a specific geologic province and time period, limiting generalizability to other magmatic settings.

Provenance

Source

Government of Yukon

Collection Method

Geochemical and isotopic analysis of rock samples from field studies.

Time Range

Mid-Cretaceous, approximately 111 to 89 Ma.

Freshness

null

Geography

Tintina Gold Province, southeastern Yukon and southwestern Northwest Territories, Canada.