Geochemistry and geochronology of Cambrian and Upper Ordovician mafic igneous rocks along

Neoproterozoic to lower Paleozoic strata from the western Laurentian margin are preserved in the northern Cordillera. The Government of Yukon provides geochemical and geochronological data for late Cambrian and Late Ordovician mafic igneous rocks concentrated along the Dawson fault in central Yukon. Data includes U-Pb zircon dates and fossil ages from interbedded strata.

Use Cases

• Modeling partial melting processes based on trace element geochemical compositions.
• Correlating volcanic pulses with basin stratigraphy based on fossil ages from enclosing strata.
• Analyzing the geochemical signature of enriched lithosphere based on alkaline and basic rock compositions.
• Studying the tectonic history of the Dawson fault zone based on the spatial concentration of magmatism.

Strengths

• Data includes two distinct pulses of magmatism dated as late Cambrian and Late Ordovician.
• Geochemical analysis suggests formation from partial melting of enriched lithosphere from the garnet stability field.
• Volcanic rocks are characterized by their alkaline and basic nature and subaqueous eruption environment.

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 Dawson fault zone in Yukon.

Provenance

Source

Government of Yukon

Collection Method

Data gathered using U-Pb zircon geochronology and fossil age analysis from interbedded strata.

Time Range

Late Cambrian and Late Ordovician periods.

Freshness

Last updated 2026-04-17 16:04:08.934708; freshness should be verified.

Geography

Dawson fault zone in central Yukon, northern Cordillera.