John Chapman

John is an exploration geochemist who has experience in a diverse range of base metal mineralization styles and settings, gaining over 20 years of working on projects from around the world.

His Ph.D. research focused on the measurement and determination of the stable isotope systematics of iron, copper, and zinc in ore-forming hydrothermal systems, including case studies in the Irish Zn-Pb district and carbonate replacement-style iron ore. During his postdoctoral work with the Geological Survey of Canada he used the chemical composition of black shale horizons, and their contained sulfide minerals, within the Archean Kidd-Munro sequence to derive vectors toward possible analogs to the giant Kidd Creek polymetallic VMS deposit. He joined the GSC full-time in 2011, and during the following eight years worked across Canada on research to elucidate the location and formation of copper, base metal, and gold deposits. Working within a mineral systems framework, John used methods varying from micron-scale mineral chemistry analysis, to continent-scale variations in crustal xenolith compositions, to better understand how and where the country’s porphyry, epithermal, and intrusion-related ore deposits were formed.