Description du projet de recherche

This PhD project investigates how hydrothermal alteration processes affect borehole geophysical responses in orogenic gold deposits, focusing on the Augmitto-Bouzan sector of the Abitibi Greenstone Belt. Detailed analysis of petrophysical logs, including resistivity, induced polarization, spontaneous potential, and sonic data, is used to characterize the impact of quartz-carbonate veins and sulfidation on geophysical signatures. To better interpret these responses, finite element modeling of resistivity logging tools is employed, testing the influence of vein geometry, borehole fluids, and electrode spacing on measured signals. Complementary geochemical and mass balance studies quantify alteration intensity and provide independent validation of the observed petrophysical trends. By integrating these approaches, the project refines the link between hydrothermal alteration and geophysical attributes, improving the ability to detect mineralized zones. Ultimately, this research advances borehole geophysics as a tool for gold exploration and contributes new insights into the metallogeny of the Canadian Shield.