Geologic Mapping and Geochronology of the Teslin Zone, Yukon

A thesis from the Government of Yukon details detailed geologic mapping and geochronology sampling in the Dycer Creek and Last Peak areas of the Pelly Mountains. The study documents rocks, transposition fabrics, and late folding across the Teslin Zone and Cassiar Platform, using U-Pb dating of zircons and monazites to constrain deformation timing.

Use Cases

• Analyze regional transposition ST (sub 2) fabrics documented on both sides of the fault for structural correlation.
• Constrain the timing of late km-scale F (sub 3) folding using U-Pb age data from monazites in the Dycer Creek Stock and Last Peak Granite.
• Investigate the Devonian age confirmation for the Mendocina Orthogneiss within the Teslin Zone from U-Pb dating of zircons.
• Study the modification of a near horizontal regional foliation into a steeply dipping orientation as a result of F (sub 3) folding.

Strengths

• Geochronology samples were collected across three field seasons (1995, 1996, 1997) for temporal constraint.
• Findings include specific U-Pb age brackets for regional folding between 113 and 98 Ma.
• The study documents rock units and structural features on both sides of a major fault for comparative analysis.

Limitations

• The core data is presented in a thesis format (HTML), not as a structured, machine-readable table or dataset.
• Sample data and column definitions are unavailable, limiting direct computational analysis.
• The findings are based on a specific local study area, which may not be generalizable to the entire region.

Provenance

Source

Government of Yukon thesis available via DOI.

Collection Method

Detailed geologic mapping and collection of geochronology samples from four plutonic bodies.

Time Range

Fieldwork conducted during 1995, 1996, and 1997 seasons.

Freshness

null

Geography

Dycer Creek area and Last Peak in the Pelly Mountains, Yukon, Canada.