Potential for Carbon Dioxide Sequestration in Flood Basalts
Flood basalts are a potentially important host medium for geologic sequestration of anthropogenic CO2. Most lava flows have flow tops that are porous, permeable, and have enormous capacity for storage of CO2. Interbedded sediment layers and dense low-permeability basalt rock overlying sequential flows may act as effective seals allowing time for mineralization reactions to occur. Laboratory experiments confirm relatively rapid chemical reaction of CO2-saturated pore water with basalts to form stable carbonate minerals. Calculations suggest a sufficiently short time frame for onset of carbonate precipitation after CO2 injection that verification of in situ mineralization rates appears feasible in field pilot studies. If proven viable, major flood basalts in the U.S. and India would provide significant additional CO2 storage capacity and additional geologic sequestration options in certain regions where more conventional storage options are limited.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 897684
- Report Number(s):
- PNNL-SA-51345; AA3010000; TRN: US200705%%289
- Journal Information:
- Journal of Geophysical Research. Solid Earth, 111(B12):Art. No. B12201, Journal Name: Journal of Geophysical Research. Solid Earth, 111(B12):Art. No. B12201
- Country of Publication:
- United States
- Language:
- English
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