The central Aishihik Lake area in Yukon (NTS 115H) hosts volcanic rocks of the Tlansanlin Formation. Geochemical, isotopic, and U-Pb dating studies show these are Late Cretaceous (75.8 ± 0.4 Ma to 77.3 ± 1.3 Ma) magmas emplaced in a continental arc setting. The data, provided by the Government of Yukon, underscores the metallogenic potential of this magmatic event.
Use Cases
- Modeling continental arc magmatism based on geochemistry and isotopic compositions
- Correlating igneous events with mineralization based on age and compositional similarity to intrusive rocks
- Assessing regional metallogenic potential based on the described Late Cretaceous magmatic event
Strengths
- Includes precise U-Pb age data with reported error margins (75.8 ± 0.4 Ma to 77.3 ± 1.3 Ma)
- Links volcanic rock data to specific mineral occurrences (Hopper porphyry and skarn, Sato porphyry)
- Provides a temporal context for a significant Late Cretaceous igneous and mineralizing event
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 specific map area (115H)
Provenance
- Source
- Government of Yukon
- Time Range
- Late Cretaceous (approximately 75-77 million years ago)
- Freshness
- Last updated 2026-04-17 16:08:27.604198; freshness should be verified
- Geography
- Central Aishihik Lake area, Yukon (NTS 115H)