Late Devonian meta-sandstone, siltstone, and phyllite host zinc-lead occurrences near the TBMB claims. U-Pb zircon geochronology indicates crystallization ages of approximately 373 Ma and 358 Ma, bracketing the deposition of this Yukon-Tanana Terrane assemblage. The Government of Yukon published this geological description, last updated on April 17, 2026.
Use Cases
- Map lithological units based on descriptions of meta-sandstone, siltstone, phyllite, marble, and tuffaceous horizons.
- Analyze structural deformation based on mentions of isoclinal folding and faulting inhibiting correlation.
- Model mineralization potential based on descriptions of chloritic tuffaceous layers hosting pyrrhotite, chalcopyrite, and sphalerite.
- Establish stratigraphic timelines using the bracketing U-Pb zircon age results of approximately 373 Ma and 358 Ma.
Strengths
- Includes specific U-Pb zircon geochronology results indicating approximate crystallization ages of 373 Ma and 358 Ma.
- Describes multiple lithologies (meta-sandstone, siltstone, phyllite, marble, tuff) and mineral occurrences (zinc-lead, pyrrhotite, chalcopyrite, sphalerite).
- Identifies specific geographic locations: Munson (TBMB) and Mod occurrences, about 7 km southwest of the Dan and Crescent properties.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data may reflect geographic bias inherent to the open_canada platform.
Provenance
- Source
- Government of Yukon
- Time Range
- Late Devonian to mid-Mississippian, with intrusions from Pre-Jurassic and Cretaceous periods.
- Freshness
- Last updated 2026-04-17 15:40:40.407853; freshness should be verified.
- Geography
- Upper Swift River area, southern Yukon, near the TBMB claims.