Paulo et al. (2023): Geochemical modeling of CO2 sequestration in ultramafic mine wastes from Australia, Canada, and South Africa: Implications for carbon accounting and monitoring

Carlos Paulo, Ian M. Power, Nina Zeyen, Baolin Wang, Siobhan A. Wilson  IN: Applied Geochemistry 152, 105630,

Mines can benefit from unintentional CO2 sequestration to offset greenhouse gas (GHG) emissions. The authors explored using inverse geochemical modeling to estimate passive carbonation rates and monitor CO2 sequestration in active mines. Water chemistry data, tailings mineralogy, and operational information routinely collected by mines were used as inputs for models. The predictive capabilities of the models were tested for Mount Keith nickel mine (Australia), Diavik diamond mine (Canada) – for which rates were previously determined using QXRD. A new site — Venetia diamond mine (South Africa) — was used to illustrate the potential of geochemical modeling for carbon accounting and as a long-term monitoring tool for CO2 sequestration.