Schaffer et al. (2025): Enhanced weathering of kimberlite residues in a field experiment: Implications for carbon removal quantification and mine waste valorization
Zivi R Schaffer, Kwon RausisIan, Ian M Power and Carlos Paulo, IN: Frontiers in Climate, https://doi.org/10.3389/fclim.2025.1592626
Scaling up enhanced rock weathering (ERW) will require gigatonnes of suitable rock, which could include mine wastes such as the estimated 3.9 Gt of kimberlite residues from historic diamond mining. Here, the authors conducted metre-scale field experiments (2021)(2022)(2023) in Ontario, Canada, to assess fine processed kimberlite residues for ERW and test carbon-based methods for CO₂ removal (CDR) quantification, including CO₂ fluxes, and measurements of soil and porewater inorganic carbon.