Middle Proterozoic Bear River dykes, dated circa 1.27 Ga, are mafic intrusions crosscutting the Gillespie Lake Group in the Slats Creek and Fairchild Lake map areas. The dataset likely contains detailed geological observations of a specific dyke, including its composition, alteration signatures, and relationship to older faults and hydrothermal systems. It was published by the Government of Yukon.
Use Cases
- Analyzing mafic intrusion composition and tholeiitic affinities based on the description of dyke rock types.
- Mapping hydrothermal alteration signatures, including Fe, Cu, and U enrichments, based on the described mineralogy.
- Studying the relationship between dyke emplacement and older fault structures based on the crosscutting description.
- Comparing dyke characteristics with the coeval Mackenzie dyke swarm based on the suggested affiliation.
Strengths
- The dataset provides a specific geological age (ca. 1.27 Ga) for the dykes.
- It describes a detailed examination of a specific dyke, including its host rock (dolostone) and alteration aureole.
- It links the observed alteration signature to a known geological event (Wernecke Breccia, 1.6 Ga).
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- The data format is HTML/PDF, which may require extraction for quantitative analysis.
Provenance
- Source
- Government of Yukon
- Time Range
- Middle Proterozoic (circa 1.27 Ga)
- Freshness
- Last updated 2026-04-17 15:51:12.962890; freshness should be verified.
- Geography
- Slats Creek and Fairchild Lake map areas (106D/16, 106C/13), Wernecke Mountains, Yukon