Abstracts of the 44th Mineral Deposits Study Group Annual Winter Meeting held virtually on 14th December 2020.

It follows that ore deposits hosting high abundances of Ca-Mg silicate/oxide/hydroxide minerals have the highest potential for CO 2 sequestration, and may sequester the highest CO 2 tonnages per Gt of tailings. Accelerated CO 2 -drawdown through enhanced weathering and carbonation of silicate minerals, whereby CO 2 reacts with minerals to produce bicarbonate solutions (i.e. alkalinity) and carbonate precipitates, is a method to capture and sequester atmospheric CO 2 on human (tens of years) to geological (hundred thousand- to several million-years) timescales. The increased levels of CO 2 in the fluids limited their capacity to transport ore-forming constituents to produce porphyry-style alteration and mineralisation, leaving the copper to precipitate within the exoskarns. It follows that ore deposits hosting high abundances of Ca-Mg silicate/oxide/hydroxide minerals have the highest potential for CO SB 2 sb sequestration, and may sequester the highest CO SB 2 sb tonnages per Gt of tailings. [Extracted from the article]