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Owen Callahan

owen callahan

Lecturer
Ph.D., Geological Sciences, The University of Texas at Austin, 2018
Office:  ELA 380
Phone: 512.245.3827
Email:  oac25@txstate.edu
Vita      HB2504 information
Research Interests:  Structural Geology and Tectonics; Faults, Fractures, and Fluids; Hydrothermal Alteration and
                                           Mineralization; Geothermal Energy 


Publications:

Callahan, O. A., Eichhubl, P., & Davatzes, N. C. (2020). Mineral precipitation as a mechanism of fault core growth. Journal of Structural Geology, 10.1016/j.jsg.2020.104156

Callahan, O. A., Eichhubl, P., Olson, J. E., & Davatzes, N. C. (2020). Experimental investigation of chemically aided fracture growth in silicified fault rocks. Geothermics, 83. 10.1016/j.geothermics.2019.101724 (download)

Callahan, O. A., Eichhubl, P., Olson, J. E., & Davatzes, N. C. (2019). Fracture mechanical properties of damaged and hydrothermally altered rocks, Dixie Valley‐Stillwater Fault Zone, Nevada, USA. Journal of Geophysical Research: Solid Earth, 124(4), 4069-4090. 10.1029/2018jb016708 (download)

Callahan, O. A. (2019). “Worksheet for ternary plots” available at Github. (link)

Callahan, O. A., Eichhubl, P., Olson, J. E., & Davatzes, N. C. (2017). Fracture mechanical properties of damaged and hydrothermally altered rocks, Dixie Valley, NV: implications for fault conduit development in geothermal systems. Paper presented at the 42nd Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA. (link)

Iovenitti, J., Ibser, F. H., Clyne, M., Sainsbury, J., & Callahan, O. (2016). The Basin and Range Dixie Valley Geothermal Wellfield, Nevada, USA-a test bed for developing an Enhanced Geothermal System exploration favorability methodology. Geothermics. 10.1016/j.geothermics.2016.01.001 (download)

Callahan, O., Cladouhos, T., Larson, B., & Ketcham, R. A. (2015). The thermal history of Garland Mineral Springs, North Cascades, WA, from apatite fission track analysis of well cuttings from geothermal exploration well GAR-1. GRC Transactions, 39, 513-528. (download)

Cladouhos, T. T., Osborn, W., Petty, S., Bour, D., Iovenitti, J., Callahan, O., Nordin, Y., Perry, D., Stern, P. L. (2012). Newberry Volcano EGS Demonstration - Phase I Results. Paper presented at the 37th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California. (link)

Iovenitti, J., Blackwell, D. D., Sainsbury, J., Tibuleac, I., Waibel, A. F., Cladouhos, T., Karlin, R., Isaaks, E., Clyne, M., Ibser, F. H., Callahan, O., Kennedy, B. M., Wannamaker, P. (2012). Towards developing a calibrated EGS exploration methodology using the Dixie Valley Geothermal System, Nevada. Paper presented at the 37th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California. (download)

Sonnenthal, E., Spycher, N., Callahan, O., Cladouhos, T., & Petty, S. (2012). A Thermal-Hydrological-Chemical Model for the Enhanced Geothermal System Demonstration Project at Newberry Volcano, Oregon. Paper presented at the Proceedings, 37th Workshop on Geothermal Reservoir Engineering, Stanford University. (link)

Cladouhos, T. T., Petty, S., Callahan, O., Osborn, W., Hickman, S., & Davatzes, N. (2011). The role of stress modeling in stimulation planning at the Newberry Volcano EGS Demonstration Project. Paper presented at the 36th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California. (download)

Iovenitti, J., Blackwell, D. D., Sainsbury, J., Tibuleac, I., Waibel, A., Cladouhos, T., Karlin, R., Kennedy, B. M., Isaaks, E., Wannamaker, P., Clyne, M., Callahan, O. (2011). EGS exploration methodology development using the Dixie Valley Geothermal District as a calibration site: a progress report. GRC Transactions, 35, 389-395. (download)

Osborn, W., Petty, S., Cladouhos, T., Iovenitti, J., Nofziger, L., Callahan, O., Perry, D. S., Stern, P. L. (2011). Newberry Volcano EGS Demonstration - Phase I Results. GRC Transactions, 35, 499-505. (download)

AltaRock Energy, Inc., (2008). Geothermal potential of Snohomish County. Internal report prepared for Snohomish Public Utility District. 122 pages. (download)