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Potential for offsetting diamond mine carbon emissions through mineral carbonation of processed kimberlite: an assessment of De Beers mine sites in South Africa and Canada |
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| Authors: | Mervine Evelyn M Wilson Sasha Power Ian M Dipple Gregory M Turvey Connor C Hamilton Jessica L Vanderzee Sterling Raudsepp Mati Southam Colette Matter Juerg M Kelemen Peter B Stiefenhofer Johann Miya Zandile Southam Gordon |
| Institution: | 1.The De Beers Group of Companies, DBM Gardens, Golf Park 2, Raapenberg Road, Pinelands, Cape Town, 7405, South Africa ;2.Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, T6G 2E3, Canada ;3.School of Earth, Atmosphere & Environment, Monash University, 9 Rainforest Walk, Clayton, Melbourne, VIC, 3800, Australia ;4.School of the Environment, Trent University, 1600 West Bank Drive, Peterborough, ON, K9L 0G2, Canada ;5.Department of Earth, Ocean, and Atmospheric Sciences, The University of British Columbia, 2020-2207 Main Mall, Vancouver, BC, V6T 1Z4, Canada ;6.School of Earth and Environmental Sciences, The University of Queensland, St. Lucia, QLD, 4072, Australia ;7.Bond Business School, Bond University, 14 University Drive, Robina, QLD, 4226, Australia ;8.National Oceanography Centre, University of Southampton, University Road, Southampton, SO17 1BJ, UK ;9.Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, New York, 10964, USA ;10.Anglo American Operations Ltd., 45 Main Street, 6th Floor, Marshalltown, Johannesburg, 2107, South Africa ; |
| Abstract: | De Beers kimberlite mine operations in South Africa (Venetia and Voorspoed) and Canada (Gahcho Kué, Victor, and Snap Lake) have the potential to sequester carbon dioxide (CO2) through weathering of kimberlite mine tailings, which can store carbon in secondary carbonate minerals (mineral carbonation). Carbonation of ca. 4.7 to 24.0 wt% (average?=?13.8 wt%) of annual processed kimberlite production could offset 100% of each mine site’s carbon dioxide equivalent (CO2e) emissions. Minerals of particular interest for reactivity with atmospheric or waste CO2 from energy production include serpentine minerals, olivine (forsterite), brucite, and smectite. The most abundant minerals, such as serpentine polymorphs, provide the bulk of the carbonation potential. However, the detection of minor amounts of highly reactive brucite in tailings from Victor, as well as the likely presence of brucite at Venetia, Gahcho Kué, and Snap Lake, is also important for the mineral carbonation potential of the mine sites. |
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