Report
New geochronological and geochemical data for Permian rocks of the western Yukon-Tanana terrane, Klondike district, Yukon
Open file (Yukon. Yukon Geological Survey), 2025-4, Yukon Geological Survey, Energy, Mines and Resources
2025
DOI: 10.83071/twq5-j879
Abstract
New U-Pb zircon dates from Permian rocks of the Yukon-Tanana terrane in the Klondike district of western Yukon provide new constraints on timing of intrusions and deposition. The new data shows that significant Pb-loss affected zircon in metamorphic rocks of the Yukon-Tanana terrane. The new, high-precision CA-TIMS dating shows that all intrusions in the region are ca. 261 Ma and eliminate previous constraints on the Klondike orogeny. A review of lithogeochemical data and new Lu-Hf isotope data for zircon support development of the Klondike assemblage in back-arc to continental arc settings. New 40Ar/39Ar data for Permian metaplutonic rocks indicates cooling below 300-350°C in the Early Jurassic.
Details
- Title: Subtitle
- New geochronological and geochemical data for Permian rocks of the western Yukon-Tanana terrane, Klondike district, Yukon
- Creators
- Maurice Colpron - Government of YukonWilliam McClelland - University of IowaStephen Piercey - Memorial University of NewfoundlandE.D.L. Kroeger - Clemson UniversityJames Crowley - Boise State UniversityGeorge E. Gehrels
- Resource Type
- Report
- Series
- Open file (Yukon. Yukon Geological Survey); 2025-4
- DOI
- 10.83071/twq5-j879
- Publisher
- Yukon Geological Survey, Energy, Mines and Resources; Whitehorse, Yukon
- Number of pages
- 35 pages
- Language
- English
- Date published
- 2025
- Academic Unit
- School of Earth, Environment, and Sustainability
- Record Identifier
- 9985175374202771
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