Physics – Geophysics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3519405k&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 19, CiteID L19405
Physics
Geophysics
3
Hydrology: Rocks: Physical Properties, Exploration Geophysics: Magnetic And Electrical Methods (5109), Hydrology: Instruments And Techniques: Monitoring, General Or Miscellaneous: New Fields (Not Classifiable Under Other Headings)
Scientific paper
In this laboratory study, we assessed the measurement of nuclear magnetic resonance (NMR) relaxation times as a means of monitoring iron mineralization processes. We conducted experiments in which columns containing ferrihydrite-coated quartz sand reacted with aqueous Fe(II) solutions to form goethite, lepidocrocite and magnetite. An observed increase in the volume of water relaxing with long relaxation times in the NMR relaxation time distribution corresponds to the formation of goethite and lepidocrocite; a decrease in the average (mean log) relaxation time, and a broadening of the relaxation time distribution, corresponds to the formation of magnetite. These results indicate that NMR relaxation times are sensitive to changes in iron mineralogy and illustrate the potential use of NMR for monitoring iron mineralization processes.
Keating Kristina
Knight Rosemary
Tufano Katharine J.
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