Sedimentology and Stratigraphy of Duncan Creek Placer Deposits in Yukon

Yukon's Duncan Creek placer deposits contain sedimentological and stratigraphic data from one of the Mayo District's most actively-mined drainages. The report details three major Quaternary glaciations affecting deposit formation and notes gold production of nearly 20,000 crude ounces in the last 15 years. It describes three main lithostratigraphic assemblages, including gold-bearing gravels buried under over 40 meters of overburden.

Use Cases

• Analyze the distribution and concentration of gold within the three described lithostratigraphic assemblages to model deposit formation.
• Correlate sediment types like stratified cobble-pebble gravel and laminated silt with glacial events (pre-Reid, Reid, McConnell) for paleoenvironmental reconstruction.
• Map the relationship between bedrock topography, glacial till, and gold-bearing gravels to identify potential placer mining targets.
• Study the interglacial wandering gravel bed river sequence, indicated by fining upward sequences and wood radiocarbon dated at 32,320 ±1270 B.P., for chronological context.

Strengths

• Report provides specific production figures, citing nearly 20,000 crude ounces of gold from Duncan Creek in the last 15 years.
• Includes detailed stratigraphic classification of three distinct lithostratigraphic assemblages with interpreted depositional environments.
• Contains temporal context spanning from early 1900s mining to present, with references to three major Quaternary glaciations.

Limitations

• Data is presented in a descriptive report format (HTML), not as a structured, queryable table or database.
• Sample data and column definitions are unavailable, limiting direct quantitative analysis.
• Geographic focus is specific to the Duncan Creek valley in central Yukon, reducing generalizability.

Provenance

Source

Government of Yukon

Collection Method

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Time Range

Covers Quaternary glacial periods to present-day mining, with specific radiocarbon date of 32,320 ±1270 B.P.

Freshness

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Geography

Duncan Creek, a tributary of the Mayo River in the Mayo District, central Yukon, Canada.