Olivine Carbon Removal

Olivine carbon removal is the mineral-specific Ocean Alkalinity Enhancement pathway in An "antacid" to fight climate change. The episode says Vesta placed more than 8,000 metric tons of olivine on the sea floor near Duck, North Carolina, to test whether dissolving olivine can change seawater chemistry and store more CO2 as bicarbonate.

Jacqueline Sentiner explains olivine as a natural silicate mineral, while Adam Subhas describes alkaline materials as an ocean “antacid.” The source’s main boundary is verification: the mineral pathway has to prove actual net removal, not only plausible chemistry, and it has to do so without unacceptable effects on marine life.

Key Claims

• Olivine can dissolve in seawater and help convert CO2 into bicarbonate, according to the source’s explanation.
• The project is monitored through ocean-chemistry sampling at different offshore locations.
• Vesta estimates about 5,000 tons of net CO2 removal for the Duck project after project emissions.
• The source does not independently prove the estimate; it treats the figure as a company estimate needing monitoring and broader research.
• Olivine deployment could connect Carbon Removal to coastal-restoration work if ecological impact remains low.

Connections

• Ocean Alkalinity Enhancement, Marine Carbon Removal, and Carbon Removal - broader technology frame.
• Vesta, Hourglass Climate, Jacqueline Sentiner, Woods Hole Oceanographic Institution, and Adam Subhas - source actors.
• Ocean Acidification, Carbon Storage Permanence, and Carbon Removal Cost Curve - chemistry, accounting, and economics frame.
• Climate Startup Commercialization Gap and Economic Climate Tech Adoption - deployment and adoption constraints.