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Field of Specialization: Near-Surface Geophysics
My research in near surface geophysics focuses on using the geophysical method, nuclear magnetic resonance (NMR), to understand processes occurring in the top 100 m’s of Earth’s surface. NMR measurements directly detect hydrogen protons water and are sensitive to their physical with chemical environment. Using NMR it is possible to non-invasively image the subsurface and obtain information about water content and pore properties. These measurements can be made from the surface or with an instrument lowered into a borehole and are typically used to characterize ground water aquifers. Through laboratory and field experiments, as well as computer modeling, we are developing new methods for interpreting NMR data to understand the link between NMR measurements and subsurface properties and processes.
B.A.Sc. University of British Columbia, Vancouver, BC, Canada, 2001
M.Sc. Stanford University, Stanford, CA, 2008
Ph.D. Stanford University, Stanford, CA, 2009
Swanson, R., A. Binley, K. Keating, S. Frances, G. Osterman, F. Day-Lewis, K. Singha (2014) Anomolous transport in saturated porous media: Linking transport model parameters to electrical and nuclear magnetic resonance properties. Submitted to Water Resources Research.
Behroozman, A., K. Keating, and E. Auken (2014) A review of the principles and applications of the NMR technique for near surface characterization. in press in Surveys in Geophysics.
Keating, K. (2014) The effect of surface area and grain size of glass bead packs on NMR relaxation rates. Near Surface Geophysics, 12(2), 243-254, doi:10.3997/1873-604.2013064.
Dlubac, K., R. Knight, K. Keating (2014) A numerical study of the relationship between NMR relaxation and permeability in sands and gravels. Near Surface Geophysics, 12(2), 219-230, doi:10.3997/1873-0604.2013042
Keating, K. and S. Falzone (2013) Relating NMR relaxation time distributions to grain size distributions for unconsolidated sands. Geophysics, 78(6), D461-472, doi:10.1190/geo2012-0461.1.
Parsekian, A., G. Grosse, J. O. Walbrecker, M. Mueller-Petke, K.Keating, L. Lui, B. M. Jones, R. Knight (2013) Detecting unfrozen sediments below thermokarst lakes with surface nuclear magnetic resonance. Geophysical Research Letters, 40, 1-6, doi:10.1002/grl.50137.
Swanson, R., K. Singha, F. D. Day-Lewis, A. Binley, K. Keating, and R. Haggerty (2012) Direct Geoelectrical Evidence of Mass Transfer at the Laboratory Scale. Water Resources Research, 48, W10543, doi:10.1029/2012WR012431.
Keating, K., and R. Knight (2012) The effect of spatial variation in surface relaxivity on nuclear magnetic resonance relaxation rates. Geophysics, 77, E362, doi:10.1190/geo2011-0462.1.
Keating, K., and R. Knight, (2010) A laboratory study of the influence of iron(II) bearing minerals on NMR relaxation measurements. Geophysics, 75(3) F71, doi:10.1190/1.3386573.
Keating, K., R. Knight, and K. Tufano (2008) Nuclear magnetic resonance relaxation measurements as a means of monitoring iron mineralization processes. Geophysical Research Letters, 35, L19405, doi:10.1029/2008GL035225.
Keating, K., and R. Knight (2008) A Laboratory Study of the Effects of Magnetite on NMR Relaxation Rates. Journal of Applied Geophysics, 66(3-4) 188, doi:10.1016/j.jappgeo2007.09.001.
Keating, K., and R. Knight, (2007) A Laboratory Study to Determine the Effects of Iron Oxides on Proton NMR Measurements. Geophysics, 72(1) E27, doi:10.1190/1.2399445.