Complex carbonate phases drive geologic CO2 mineralization
Journal Article
·
· Communications Earth & Environment
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Colorado School of Mines, Golden, CO (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Geologic carbon sequestration in mafic and ultramafic reservoirs is a scalable strategy for carbon dioxide removal, offering permanent storage via mineralization as stable carbonates. However, there is limited information on the structure and composition of key mineralization endpoints during sequestration. Here, we unravel the atomic structure, composition, and nanoscale morphology of carbonates recovered from a field-scale demonstration of CO2 mineralization in basalt. Using transmission electron microscopy, we mapped mineralogical variations from the initial to later stages of subsurface carbonate growth and identified a previously unknown cation-ordered ankerite phase that exerts a primary control over carbonation processes. This study has provided a new understanding of subsurface carbonation pathways which will impact the parameterization of predictive geochemical models for future sequestration efforts in basalt formations.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 2566948
- Alternate ID(s):
- OSTI ID: 2570358
- Report Number(s):
- PNNL-SA--194276
- Journal Information:
- Communications Earth & Environment, Journal Name: Communications Earth & Environment Journal Issue: 1 Vol. 6; ISSN 2662-4435
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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