What is the Life Cycle Analysis Costs of CO2 Incurred in the Mining, Milling and Transport?
The Life Cycle Analysis (LCA) of the release of CO2 from mining, milling, and transport of olivine creates an approximately 4-6% loss on CO2 removed. We will always work to minimize the transport distance from the source of olivine, and utilize low impact transit such as rail and boats. Further, many tons of olivine are already mined because the deposits are found above other valuable minerals, such as diamonds (found in a rock formation called Kimberlite). Utilizing these piles of waste rock, known in the industry as tailings piles, will allow us to harvest olivine without causing a significant CO2 output. Further, the dust from mining itself can contribute to the offset of the entire mine, as well as the very ground where the olivine is exposed. It starts weathering right away, and many ultramafic mineral mines, abandoned or active, eventually offset their own footprint and even go towards negative emissions. On of our olivine weathering rate sources is actually these tailings piles. See these studies:
Carbon Dioxide Fixation within Mine Wastes of Ultramafic-Hosted Ore Deposits: Examples from the Clinton Creek and Cassiar Chrysotile Deposits, Canada
Integrated Mineral Carbonation of Ultramafic Mine Deposits—A Review
LATERITIC EVOLUTION OF THE JACUPIRANGA ALKALlNE COMPLEX
Koornneef JM, Nieuwlaar E (in prep.) Environmental life cycle assessment of CO 2 sequestration through enhanced weathering of olivine. Working paper, Group Science, Technology and Society, Utrecht University