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Upcoming TALKS

Title: Advances in open-source 3D inversion of AFMAG data; A case study at the Méquillon deposit in Nunavik, Quebec

Date: Tuesday November 14th at 4:00 PM EST

Speaker: Stanislawa Hickey, Mira Geoscience

Location: In Person (University of Toronto, Department of Earth Sciences, Room ES2093 (22 Ursula Franklin Street)) and virtual,please register here


The Méquillon Deposit is part of the Nunavik Nickel Project, located within the Cape Smith Belt in Nunavik, Quebec and was acquired by Canadian Royalties (CRI) in 2001.CRI’s mandate, to find new deposits and extend the limits of existing resources, led to testing new regional exploration tools to overcome some of the challenges posed by a deposit like Méquillon. Mira Geoscience was contracted to establish the feasibility of detecting the deposit within its geological environment with the ZTEM™ (Z-Axis Tipper Electromagnetic) airborne system using forward modelling exercise. After a conclusive investigative study, a ZTEM™ test survey was conducted by Geotech in 2021. Mira Geoscience was then mandated to perform a 3D inversion of the newly collected data to validate that the ore body has a clear signature in the inversion model. The UBC-GIF MTZ3D program was first used to perform the inversion but, due to limitations in model results related to the computational problem’s size with MTZ3D, it was decided to test the open-source Python package SimPEG (Heagy et al, 2017). This presentation will compare these 3D inversion results over the deposit and demonstrate that SimPEG 3D model results improved the characterisation of Méquillon’s signature in a complex geophysical environment.

Author Biography

Stanislawa Hickey obtained a MSc in Geophysics, Resources and Environment from Université Pierre et Marie Curie, Paris, France. After graduating she moved to Canada to start a career in the mining industry, where she spent her early years gathering experience in the field and in geophysical data acquisition working with Abitibi Geophysics and Frontier Geosciences. In 2010, she joined Mira Geoscience’s consulting team where she now works as a Senior Geophysicist. She is based in Montreal.

Upcoming Talks:

KEGS Foundation Jerry Roth student symposium at University of Toronto and the KEGS Christmas party on December 5th- Ken Witherly will talk about the history of KEGS at the party

January – Jim Craven- TBD

February –  Omid Bagherpour, BHP- TBD




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