Two undeformed granitic pluton suites intrude deformed siliciclastic rocks in the western Dorsey Terrane. A Jurassic gabbro-granodiorite stock dated at 181.5 Ma and a mid-Cretaceous granite suite dated at approximately 100 Ma constrain deformation timing. The data, published by the Government of Yukon, includes isotopic ratios and chemical signatures indicating a mantle-derived, subduction-related setting.
Use Cases
- Analyze tectonic polarity based on spatial relationships between craton-derived clastic rocks and plutons.
- Model magma generation sources based on 'juvenile' Sr isotopic ratios of 0.7045.
- Constrain deformation timing using radiometric dates of intrusive suites.
- Study shallow crustal emplacement conditions based on absence of isotopic resetting.
Strengths
- Includes specific radiometric dates (181.5 Ma and ~100 Ma) for two pluton suites.
- Contains concrete isotopic ratio data (Sr ratio of 0.7045).
- Provides detailed geological context for the Dorsey Terrane.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data format is HTML/PDF, which may require extraction for analysis.
Provenance
- Source
- Government of Yukon
- Time Range
- Jurassic (181.5 Ma) to mid-Cretaceous (~100 Ma)
- Freshness
- Last updated 2026-04-17 15:49:44.002646; freshness should be verified.
- Geography
- Thirtymile Range, southern Yukon, western Dorsey Terrane