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Andrew Luhmann, Ph.D.

Assistant Professor of Geology

On Faculty since 2018
630.752.7476


andrew.luhmann@wheaton.edu

After completing graduate school, Dr. Andrew Luhmann conducted research as a Postdoctoral Researcher/Research Associate for four years in the Department of Earth Sciences at the University of Minnesota in Minneapolis. He spent the following three years as an Assistant Professor of Hydrology in the Department of Earth and Environmental Science at the New Mexico Institute of Mining and Technology in Socorro, NM. His research generally involves the fields of hydrogeology and geochemistry, and his current research projects funded by the National Science Foundation and the Department of Energy explore geophysical responses to recharge events in karst aquifers and chemomechanical processes in geologic carbon sequestration environments, respectively. He previously served as an Associate Editor of Hydrogeology Journal and the Primary Representative of the Joint Technical Program Committee for the Geological Society of America Karst Division.

University of Minnesota, Twin Cities
Postdoctoral, Postdoctoral Research Associate, 2014

University of Minnesota, Twin Cities
Ph.D., Geology, 2011

Wheaton College
B.S., Geology, 2006

  • Karst Hydrogeology
  • Flow and Transport
  • Aqueous Geochemistry
  • Fluid-Rock Interaction
  • Geologic Carbon Sequestration
  • American Geophysical Union: Member
  • American Scientific Affiliation: Member
  • Geochemical Society: Member
  • Geological Society of America: Member and Primary Representative of GSA Karst Division Joint Technical Program Committee (2018 - 2020)

Courses Taught:

  • CORE 345/ GEOL 306: Water, the Essential Resource
  • GEOL/ENVR 212: Dynamic Earth and Environment
  • GEOL 232: Environmental Geochemistry
  • GEOL 336: Process Geomorphology
  • GEOL 395/495: Geoscience Research
  • GEOL 437: Hydrogeology
  • GEOL 494: Senior Capstone Seminar for Geology Majors

Dr. Luhmann’s previous research focused on using water temperature as a tracer in karst aquifers to identify aquifer and flow path information and quantifying physical and chemical processes that arise during fluid-rock interaction in geologic carbon sequestration and serpentinization settings. Current projects consider a range of topics that include using geophysical signals generated from within karst aquifers during recharge events to characterize them and to monitor for flow, exploring the impact of variable conduit networks on solute transport in karst aquifers, identifying mechanical effects that arise due to fluid-rock interactions in geological carbon sequestration environments, and assessing the role of diagenesis during multiphase fluid flow in the subsurface.

Recent invited seminars 

Vanderbilt University, Department of Civil and Environmental Engineering, Nov. 20, 2020 

Northern Illinois University, Department of Geology and Environmental Geosciences, Jan. 24, 2020 

Olivet Nazarene University, Department of Chemistry and Geosciences, April 1, 2019 

Recent conference presentations 

* indicates Wheaton College student author 

^ indicates graduate student author at another institution 

# indicates undergraduate student author at another institution 

^Otu, S., A.J. Rinehart, A.J. Luhmann, P. Mozley, and J.E. Heath. 2021. Exploring the link between diagenesis and chemically enhanced creep deformation under carbon sequestration settings: An experimental study. Abstract to be presented at the 2021 American Rock Mechanics Association Symposium, Houston, Texas, 20-23 June. 

Luhmann, A.J., S.L. Bilek, R. Grapenthin, M.D. Covington, J.A. Gochenour^, and H.B. Woo^. 2020. Seismic observations of possible overpressurized air pocket release in a karst aquifer. Abstract H054-03 presented at the 2020 Fall Meeting, AGU, San Francisco, Calif., 7-11 Dec. 

^Gochenour, J.A., S.L. Bilek, H.B. Woo^, A.J. Luhmann, R. Grapenthin, and J.B. Martin. 2020. Seismic responses to the rate-of-change of surface- and groundwater level within a karst aquifer system, Santa Fe River Sink-Rise, north-central Florida. Abstract S025-07 presented at the 2020 Fall Meeting, AGU, San Francisco, Calif., 7-11 Dec. 

^Simmons, J., A.J. Rinehart, A.J. Luhmann, J.E. Heath, and P. Mozley. 2020. Quantifying chemomechanical reservoir sensitivity to CO2 injection using paragenesis, flow-through experiments and strength testing at in situ conditions, Farnsworth Unit, Texas. Abstract GC111-08 presented at the 2020 Fall Meeting, AGU, San Francisco, Calif., 7-11 Dec. 

^Woo, H.B., S.L. Bilek, J.A. Gochenour^, P.N. Adams, A.J. Luhmann, R. Grapenthin, and J.B. Martin. 2020. Monitoring spatial and temporal changes in seismic velocity of the Florda karst aquifer system with phase cross-correlation and wavelet cross-spectral analysis. Abstract S021-0003 presented at the 2020 Fall Meeting, AGU, San Francisco, Calif., 7-11 Dec. 

Luhmann, A.J., S.M. Becker*, C.K. Browning*, L.J. Dykhouse*, A.C. Madsen*, M.D. Covington, M.T. Childre, F. Gabrovšek, E.K. Herman, J.S. Polk, M.E. Schreiber, B.F. Schwartz, G. Tagne, and L. Toran. 2020. Evaluation of thermal retardation in karst aquifers. Geological Society of America Annual Meeting Abstracts with Programs, Vol. 52, No. 6, Paper No. 213-3, doi: 10.1130/abs/2020AM-359721. 

*Phinney, A.I., L.P. Persico, A.J. Luhmann, C. Iosso, A. Hinzmann, T. Foky, and E. Van Wetter. 2020. Geomorphic controls on hydraulic processes of Blacktail Deer Creek, Yellowstone National Park. Geological Society of America Annual Meeting Abstracts with Programs, Vol. 52, No. 6, Paper No. 27-11, doi: 10.1130/abs/2020AM-360039. 

Kavousi, A., T. Reimann, R. Liedl, T. Wöhling, A. Luhmann, M. Sauter, J. Kordilla, and T. Noffz. 2020. Characterization of karst systems by joint inversion of spring flow and transport signatures from a spatiotemporally small-scale controlled test. Geological Society of America Annual Meeting Abstracts with Programs, Vol. 52, No. 6, Paper No. 213-5, doi: 10.1130/abs/2020AM-357452. 

*Penney, L.J., S.L. Bilek, J.A. Gochenour^, A.J. Luhmann, R. Grapenthin, and J.B. Martin. 2019. Characterization of environmental seismic noise near a karst aquifer in Florida. Abstract S23D-0661 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec. 

*Browning, C.K., A.J. Luhmann, S.M. Becker*, L.J. Dykhouse*, A.I. Phinney*, M.T. Childre, M.D. Covington, F. Gabrovšek, E.K. Herman, J.B. Martin, J.S. Polk, M.E. Schreiber, B.F. Schwartz, and L. Toran. 2019. Thermal retardation in karst aquifers: Field observations. Abstract H21H-1818 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec. 

^Gochenour, J.A., S.L. Bilek, R. Grapenthin, A.J. Luhmann, L.J. Penney*, and J.B. Martin. 2019. Expanding environmental seismology to karst aquifer systems: Correlating seismic power to discharge from a conduit network. Abstract S33B-04 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec. 

^Simmons, J., A.J. Rinehart, A.J. Luhmann, P. Mozley, and J.E. Heath. 2019. Quantification of paragenetic controls on chemomechanical sensitivity of the Morrow B Sandstone during CO2 injection, Farnsworth Unit, Texas. Abstract MR41C-0069 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec. 

Luhmann, A.J., C.K. Browning*, L.J. Dykhouse*, J.A. Gochenour^, S.A. Barbosa^, S.L. Bilek, R. Grapenthin, T. Summerall#, K. Van Der Velde#, J.B. Martin, and L.J. Penney*. 2019. Estimating conduit diameter in an eogenetic karst aquifer from modified water temperature signals. Geological Society of America Annual Meeting Abstracts with Programs, Vol. 51, No. 5, Paper No. 90-3, doi: 10.1130/abs/2019AM-339753. 

*Becker, S.M., A.J. Luhmann, C.K. Browning*, A.I. Phinney*, M.T. Childre, M.D. Covington, F. Gabrovšek, E.K. Herman, J.S. Polk, M.E. Schreiber, B.F. Schwartz, and L. Toran. 2019. Field analysis of thermal retardation in karst aquifers. Geological Society of America Annual Meeting Abstracts with Programs, Vol. 51, No. 5, Paper No. 114-4, doi: 10.1130/abs/2019AM-340404. 

^Wu, Z., A.J. Luhmann, A.J. Rinehart, P.S. Mozley, T.A. Dewers, J.E. Heath, and B.S. Majumdar. 2019. Chemo-mechanical degradation in carbonate-cemented sandstone induced from carbon sequestration: An experimental study of CO2-brine-rock interaction. Abstract presented at the Addressing the Nation’s Energy Needs Through Technology Innovation – 2019 Carbon Capture, Utilization, Storage, and Oil and Gas Technologies Integrated Review Meeting in Pittsburgh, PA, 26-30 Aug. 

Tutolo, B.M., A.J. Luhmann, X.-Z. Kong, B.C. Bagley, M.O. Saar, and W.E. Seyfried, Jr. 2019. The contribution of nanoscale pores to anomalous trace element release during dolomite dissolution. 2019 Goldschmidt Meeting, Barcelona, Spain, 18-23 Aug. 

^Gochenour, J.A., S.L. Bilek, R. Grapenthin, A.J. Luhmann, J.B. Martin, and S.A. Barbosa^. 2019. Seismic observations of precipitation and recharge-related signals in the Floridan Aquifer at Santa Fe River Sink and Rise, Florida. Abstract presented at the 2019 Seismological Society of America Annual Meeting, Seattle, WA, 23-26 Apr. 

Tutolo, B.M., A.J. Luhmann, X.-Z. Kong, B.C. Bagley, D. Alba-Venero, N. Mitchell, M.O. Saar, and W.E. Seyfried, Jr. 2020. Contributions of visible and invisible pores to reactive transport in dolomite. Geochemical Perspectives Letters, 14, 42-46, https://doi.org/10.7185/geochemlet.2022

Tutolo, B.M., T. Kiesel, A.J. Luhmann, P. Solheid, and W.E. Seyfried, Jr. 2020. Experimental evaluation of the role of redox during glauconite-CO2-brine interactions. Applied Geochemistry 115, 104558, https://doi.org/10.1016/j.apgeochem.2020.104558

Wu, Z., A.J. Luhmann, A.J. Rinehart, P.S. Mozley, T.A. Dewers, J.E. Heath, and B.S. Majumdar. 2020. Chemo-mechanical alterations induced from CO2 injection in carbonate-cemented sandstone: An experimental study at 71°C and 290 MPa. Journal of Geophysical Research-Solid Earth 125, e2019JB019096, https://doi.org/10.1029/2019JB019096.

Rasmussen, L., T. Fan, A. Rinehart, A. Luhmann, W. Ampomah, T. Dewers, J. Heath, M. Cather, and R. Grigg. 2019. Carbon storage and enhanced oil recovery in Pennsylvanian Morrow Formation clastic reservoirs: Controls on oil/brine and oil/CO2 relative permeability from diagenetic heterogeneity and evolving wettability. Energies 12 (19), 3663, https://doi.org/10.3390/en12193663.

Tutolo, B.M., A.J. Luhmann, N.J. Tosca, and W.E. Seyfried, Jr. 2018. Serpentinization as a reactive transport process: The brucite silicification reaction. Earth and Planetary Science Letters 484, 385-395, https://doi.org/10.1016/j.epsl.2017.12.029

Douglas, P.M.J., D.A. Stolper, J.M. Eiler, A.L. Sessions, M. Lawson, Y. Shuai, A. Bishop, O.G. Podlaha, A.A. Ferreira, E.V. Santos Neto, M. Niemann, A.S. Steen, L. Huang, L. Chimiak, D.L. Valentine, J. Fiebig, A.J. Luhmann, W.E. Seyfried, Jr., G. Etiope, M. Schoell, W.P. Inskeep, J.J. Moran, and N. Kitchen. 2017. Methane clumped isotopes: Progress and potential for a new isotopic tracer. Organic Geochemistry 113, 262-282, https://doi.org/10.1016/j.orggeochem.2017.07.016

Luhmann, A.J., B.M. Tutolo, B.C. Bagley, D.F.R. Mildner, P.P. Scheuermann, J.M. Feinberg, K. Ignatyev, and W.E. Seyfried, Jr. 2017. Chemical and physical changes during seawater flow through intact dunite cores: An experimental study at 150-200°C. Geochimica et Cosmochimica Acta 214, 86-114, https://doi.org/10.1016/j.gca.2017.07.020

Luhmann, A.J., B.M. Tutolo, B.C. Bagley, D.F.R. Mildner, W.E. Seyfried, Jr., and M.O. Saar. 2017. Permeability, porosity, and mineral surface area changes in basalt cores induced by reactive transport of CO2-rich brine. Water Resources Research 53 (3): 1908-1927, https://doi.org/10.1002/2016WR019216

Luhmann, A.J., B.M. Tutolo, C. Tan, B.M. Moskowitz, M.O. Saar, and W.E. Seyfried, Jr. 2017. Whole rock basalt alteration from CO2-rich brine during flow-through experiments at 150°C and 150 bar. Chemical Geology 453: 92-110, https://doi.org/10.1016/j.chemgeo.2017.02.002

Syverson, D.D., A.J. Luhmann, C. Tan, D.M. Borrok, K. Ding, and W.E. Seyfried, Jr. 2017. Fe isotope fractionation between chalcopyrite and dissolved Fe during hydrothermal recrystallization: An experimental study at 350 ºC and 500 bars. Geochimica et Cosmochimica Acta 200, 87-109, https://doi.org/10.1016/j.gca.2016.12.002

Tutolo, B.M., A.J. Luhmann, X.-Z. Kong, M.O. Saar, and W.E. Seyfried, Jr. 2015. CO2 sequestration in feldspar-rich sandstone: Coupled evolution of fluid chemistry, mineral reaction rates, and hydrogeochemical properties. Geochimica et Cosmochimica Acta 160, 132-154, https://doi.org/10.1016/j.gca.2015.04.002

Luhmann, A.J., M.D. Covington, J.M. Myre, M. Perne, S.W. Jones, E.C. Alexander, Jr., and M.O. Saar. 2015. Thermal damping and retardation in karst conduits. Hydrology and Earth System Sciences 19: 137-157, https://doi.org/10.5194/hess-19-137-2015

Luhmann, A.J., X.-Z. Kong, B.M. Tutolo, N. Garapati, B.C. Bagley, M.O. Saar, and W.E. Seyfried, Jr. 2014. Experimental dissolution of dolomite by CO2-charged brine at 100 ºC and 150 bar: Evolution of porosity, permeability, and reactive surface area. Chemical Geology 380: 145-160, https://doi.org/10.1016/j.chemgeo.2014.05.001

Tutolo, B.M., A.J. Luhmann, X.-Z. Kong, M.O. Saar, and W.E. Seyfried, Jr. 2014. Experimental observation of permeability changes in dolomite at CO2 sequestration conditions. Environmental Science & Technology, 48, no. 4: 2445-2452, https://doi.org/10.1021/es4036946

Luhmann, A.J., X.-Z. Kong, B.M. Tutolo, K. Ding, M.O. Saar, and W.E. Seyfried, Jr. 2013. Permeability reduction produced by grain reorganization and accumulation of exsolved CO2 during geologic carbon sequestration: A new CO2 trapping mechanism. Environmental Science & Technology 47, no. 1: 242-251, https://doi.org/10.1021/es3031209

Luhmann, A.J., M.D. Covington, S.C. Alexander, S.Y. Chai, B.F. Schwartz, J.T. Groten, and E.C. Alexander, Jr. 2012. Comparing conservative and nonconservative tracers in karst and using them to estimate flow path geometry. Journal of Hydrology 448-449: 201-211, https://doi.org/10.1016/j.jhydrol.2012.04.044.  

Covington, M.D., A.J. Luhmann, C.M. Wicks, and M.O. Saar. 2012. Process length scales and longitudinal damping in karst aquifers. Journal of Geophysical Research-Earth Surface 117, F01025, https://doi.org/10.1029/2011JF002212

Covington, M.D., A.J. Luhmann, F. Gabrovšek, M.O. Saar, and C.M. Wicks. 2011. Mechanisms of heat exchange between water and rock in karst conduits. Water Resources Research 47, W10514, https://doi.org/10.1029/2011WR010683

Luhmann, A.J., M.D. Covington, A.J. Peters, S.C. Alexander, C.T. Anger, J.A. Green, A.C. Runkel, and E.C. Alexander, Jr. 2011. Classification of thermal patterns at karst springs and cave streams. Ground Water 49, no. 3: 324-335, https://doi.org/10.1111/j.1745-6584.2010.00737.x.