Mount Harper Group Sedimentary Rock Analysis in Yukon

Government of Yukon data describes the Upper Proterozoic to Lower Cambrian Mount Harper Group sedimentary rocks in the Ogilvie Mountains. The dataset provides geological analysis including stratigraphy, facies descriptions, and age constraints from a ca. 750 Ma U-Pb date and Lower Cambrian trace fossils.

Use Cases

• Analyze stratigraphic sequences and unconformities, such as the basal breccia layer with silcretes and calcretes, for basin evolution models.
• Model sediment provenance and basin fill using described proximal, intermediate, and distal facies like fault-talus breccia and debris-flow conglomerates.
• Correlate climate indicators from silcrete and calcrete features to interpret semi-arid to arid paleoclimate regimes at the onset of Windermere deposition.
• Study synsedimentary normal faulting described as controlling the half-graben basin development and internal sequence architecture.

Strengths

• Provides direct time constraints for strata using a ca. 750 Ma U-Pb age and Lower Cambrian trace fossils.
• Includes detailed sedimentological analysis of basin fill, describing facies from proximal fault-talus breccia to distal braided channel deposits.
• Documents a basin-fill coarsening-upward megasequence recording a transition from lacustrine redbeds to alluvial fan conglomerates.

Limitations

• Dataset scope is limited to a specific geological group in the Ogilvie Mountains, Yukon, reducing generalizability.
• Information is presented in a descriptive HTML format, lacking structured, machine-readable tabular data for quantitative analysis.
• Sample data and quantified measurements (e.g., exact thickness, grain size distributions) are unavailable.

Provenance

Source

Government of Yukon

Collection Method

null

Time Range

Upper Proterozoic to Lower Cambrian

Freshness

null

Geography

Ogilvie Mountains, west-central Yukon, Canada