Timing and metamorphic conditions of the Wopmay Fault, NWT

Regions: North Slave Region

Tags: physical sciences, bedrock, geochronology, Wompay Fault

Principal Investigator: Dyck, Brendan (3)
Licence Number: 17035
Organization: University of British Columbia
Licensed Year(s): 2022
Issued: May 13, 2022
Project Team: Kyle Larson, Jamie Cutts, Alix Osinchuk, Kelsey Krossa

Objective(s): To date the timing of motion of the Wopmay Fault using geochronologic analyses of the minerals titanite, apatite & calcite, and to determine the depth and temperatures that the fault rocks were at when the fault zone was active.

Project Description: This licence has been issued for the scientific research application No.5234. The research team will collect bedrock samples across the fault zone to date the timing of motion of the Wopmay Fault using geochronologic analyses of the minerals titanite, apatite & calcite, and determine the depth and temperatures that the fault rocks were at when the fault zone was active. The work will involve geological mapping and detailed sampling. The research team plan to focus on the southernmost exposure of the fault zone, near the town of Gamètì. While there are numerous lakes in this region, there are no interconnected waterways that could serve as access to the Wopmay Fault zone, making helicopter-supported fieldwork the only reasonable option. The plan is to base out of the Gamètì airfield and set out a team of two-three persons at select outcrops to document and sample the fault zone while the remaining participants do helicopter-supported reconnaissance mapping of the neighbouring crustal units. The purpose of the reconnaissance mapping it to determine how far related deformation has propagated into neighbouring bedrock units from the core of the fault zone. Fieldwork will be followed up with lab-based geochronology, isotope geochemistry, and microstructural studies undertaken at University of British Columbia’s Okanagan campus. The principal investigator (PI) will get in telephone or email contact with representatives of the Tli?cho Government and the Gamètì community to discuss the planned research and seek input and approval. Once the research is conducted the PI will submit a report to be disseminated to these stakeholders that explains the findings and future study plans. The research is in collaboration with the Northwest Territories Geological Survey (NTGS), so the research team plan to use the contacts at NTGS to help share the results at stakeholder engagement meetings run by the NTGS. The fieldwork for this study will be conducted from July 9, 2022 to July 16, 2022