Multi-scale magnetic mapping of serpentinite carbonation
Author(s)
Tominaga, Masako; Beinlich, Andreas; Tivey, Maurice A.; Hampton, Brian A.; Harigane, Yumiko; Lima, Eduardo A.; Weiss, Benjamin P.; ... Show more Show less
Downloads41467-017-01610-4.pdf (6.026Mb)
PUBLISHER_CC
Publisher with Creative Commons License
Creative Commons Attribution
Terms of use
Metadata
Show full item recordAbstract
Peridotite carbonation represents a critical step within the long-term carbon cycle by sequestering volatile CO₂ in solid carbonate. This has been proposed as one potential pathway to mitigate the effects of greenhouse gas release. Most of our current understanding of reaction mechanisms is based on hand specimen and laboratory-scale analyses. Linking laboratory-scale observations to fi eld scale processes remains challenging. Here we present the fi rst geophysical characterization of serpentinite carbonation across scales ranging from km to sub-mm by combining aeromagnetic observations, outcrop- and thin section-scale magnetic mapping. At all scales, magnetic anomalies coherently change across reaction fronts separating assemblages indicative of incipient, intermittent, and fi nal reaction progress. The abundance of magnetic minerals correlates with reaction progress, causing amplitude and wavelength variations in associated magnetic anomalies. This correlation represents a foundation for characterizing the extent and degree of in sity ultramafic rock carbonation in space and time.
Date issued
2017-11Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary SciencesJournal
Nature Communications
Publisher
Springer Nature
Citation
Tominaga, Masako, Andreas Beinlich, Eduardo A. Lima, Maurice A. Tivey, Brian A. Hampton, Benjamin Weiss, and Yumiko Harigane. “Multi-Scale Magnetic Mapping of Serpentinite Carbonation.” Nature Communications 8, no. 1 (November 30, 2017).
Version: Final published version
ISSN
2041-1723