Ground Penetrating Radar
(ground probing radar, subsurface radar, georadar, earth sounding radar)

GRORADAR™ by Gary R. Olhoeft, PhD
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Gary R. Olhoeft, PhD
Professor of Geophysics
Department of Geophysics
Colorado School of Mines
1500 Illinois Street
Golden, Colorado 80401-1887
303-273-3458 of, -3450 dept, -9202 fax
golhoeft@mines.edu
http://www.mines.edu/~golhoeft
http://www.g-p-r.com


Education: Massachusetts Institute of Technology S. B. E. E., 1972
Massachusetts Institute of Technology S. M. E. E., 1972
University of Toronto Ph. D. (geophysics), 1975

Memberships in professional societies
American Association for the Advancement of Science, 1968-date
American Geophysical Union, 1972-date
Society of Exploration Geophysicists, 1973-date (sub-committee chairman, 3X Assoc. Editor)(NSG Section)
The Chemical Society (London), 1973-1988 (now the Royal Society of Chemistry)
Division of Planetary Science of the Amer. Astron. Soc., 1975-date
American Society for Testing and Materials, 1978-date (subcommittee chairman)
Society of Professional Well Log Analysts, 1980-date (Assoc. Editor)
MGOD/SEMEG/DEMEGS, 1981-date
Society of Photographic Scientists and Engineers, 1981-1990
IEEE Geosci. and Rem. Sens. Soc. 1982-date (chapter vice-chair 1982-1983) (chapter chair 1983-1985)
Minerals and Geotechnical Logging Society, 198?-date
Association of Ground Water Scientists and Engineers, 1987-1997
Society of Core Analysts, 1990-date
Engineering & Environmental Geophysical Society, 1992-date
IEEE Computer Society, 1993-date
Denver Well Logging Society, 1994-date
Society of Petroleum Engineers, 1996-date
Association of Computing Machinery, 1996-date

Courses Taught:
USGS WRD Geophysics for Hydrologists Short Course, Denver, CO, 3/79, 4/84, 4/85, 1/86 (Atlanta), 4/87, 4/90, 4/91, 4/92, 4/93
USGS GD Geophysics for Geologists Short Course, Reston, VA, 3/80
Short Course on Electrical Properties of Rocks and Minerals (3-days, sole lecturer), 9/80, 9/81, 4/82, 9/83, 10/83 (Australia), 11/85, 5/86 (Scotland). (taken by over 120 oil industry professionals; stopped teaching it when government ethics law changes made continuation illegal in 1988)
SAGEEP Introduction to Ground Penetrating Radar, 4/88
U. S. Army WES Geophysics Short Course, Vicksburg 5/92
CSM GPGN307/308, Introduction to Electrical and EM Methods, 95 (partial), 98 (partial)
CSM GPGN309 Introduction to Borehole Geophysics, 95, 96, 97
CSM GPGN432 Borehole Geophysics, 95, 97, 98 (partial)
CSM Field Camp, Shallow Geophysics Option, 95, 96, 97, 98, 99
CSM Field Camp, Well Logging Option (Western Atlas Logging School, Odessa, TX), 96
CSM GPGN509 Physical and Chemical Properties and Processes in Rocks, Soils and Fluids, 95, 96, 97, 98, 99
CSM GPGN422 Electrical Exploration Methods, partial in 1994, half in 95, 96 , 97, 98, 99 (w/Adel Zohdy)
CSM GPGN590C Noninvasive Environmental Site Characterization, 96
CSM GPGN582 Geophysical Investigation: Ground Penetrating Radar, 96
CSM GPGN471 Ground penetrating radar independent study, 97
CSM EP202E, EPICS base station recording magnetometer project, 97
CSM 101, Freshman Mentor, 96, 97, 98, 99
CSM GPGN520, Electrical and Electromagnetic Exploration: Ground Penetrating Radar, 97, 99
CSM GPGN438 Geophysics Project Design, 97, 98, 99
CSM GPGN298/210 Materials of the Earth, 98, 99, 00
CSM GPGN521, Advanced Electrical and Electromagnetic Exploration: Complex Resistivity, 98

Graduate Theses Supervised: (those listed in bold are available on CD-ROM)
Ucok, H., 1979, Temperature dependence of the electrical resistivity of aqueous salt solutions and solution-saturated porous rocks: PhD Thesis, Dept of Petroleum Engr., Univ. of So. Califo., 154 p.
Brodsky, N.S., 1985, An investigation of the fracture of granite under triaxial stress: PhD thesis, Dept. of Geological Sciences, University of Colorado, Boulder, 234 p.
Kutrubes, D.L., 1986, Dielectric permittivity measurements of soils saturated with hazardous fluids: MSc Thesis, Dept. of Geophysics, Colorado School of Mines, Golden, 300 p.
Sadowski, R.M., 1988, Clay-organic reactions: MSc Thesis, Dept of Geochemistry, Colorado School of Mines, Golden, 209 p.
Bochicchio, R., 1988, Computerized geometric correction of ground penetrating radar images: MSc Thesis (Geophysical Engineering), Dept. of Geophysics, Colorado School of Mines, Golden, 91 p.
Duke, S.K., 1990, Calibration of ground penetrating radar and calculation of attenuation and dielectric permittivity versus depth: MSc Thesis, Dept. of Geophysics, Colorado School of Mines, Golden, 236 p.
Huffman III, A.C., 1992, Characterization of three-dimensional geological heterogeneities using ground penetrating radar, MSc Thesis, Dept. Geophysics, Colorado School of Mines, Golden, 189 p.
Powers, M. H., 1995, Dispersive ground penetrating radar modeling in 2D: PhD thesis T-4820, Dept of Geophysics, Colorado School of Mines, Golden, 198p.
Fueg, J. E., 1996, Three dimensional gravity modeling of the Galveston Island salt dome in the Gulf of Mexico, Msc thesis, Dept of Geophysics, Colorado School of Mines, Golden, 91p.
Fagan, J. P., 1996, An integrated interpretation of aeromagnetic data in the paleozoic of the Nebraska panhandle: Master of Engineering Report ER-4571, Dept of Geophysics, Colorado School of Mines, Golden, 77p.
Jones, D. P., 1997, Investigation of clay-organic reactions using complex resistivity: MSc thesis, Dept of Geophysics, Colorado School of Mines, Golden, 378 + CD-ROM.
Kirkendall, B., 1998, A rapid limited 3-dimensional near-field modeling program for ground penetrating radar: MSc thesis, Dept of Geophysics, Colorado School of Mines, Golden, 176p. (CD-ROM)
Canan, B., 1999, Dielectric properties of clay-water-organic compounds: PhD thesis, Dept. of Geophysics, Colorado School of Mines, Golden, 332p. + CD-ROM.
Goedecke, W. B., 1999, Validation of the phase difference technique for inferring magnetospheric resonance frequencies: PhD thesis, Dept. of Geophysics, Colorado School of Mines, Golden, 138p. + 3 CD-ROMs.
Abraham, J. D., 1999, Physical modeling of a prototype slim-hole time-domain dielectric logging tool: MSc thesis, Dept of Geophysics, Colorado School of Mines, Golden, 217p. + CD-ROM.
Fiore, R. M., 1999, 3D numerical forward modeling of complex resistivity field data: MSc thesis, Dept of Geophysics, Colorado School of Mines, Golden, 303p. + CD-ROM.
Oshetski, K. C., 1999, Complex resistivity to evaluate the biooxidation of gold ore: MSc thesis, Dept of Geophysics, Colorado School of Mines, Golden, 148p. +  CD-ROM.
Roth, F., 1999, Strapdown inertial navigation applications in ground penetrating radar: theory and experiments: MSc thesis, Dept of Geophysics, Colorado School of Mines, Golden, 217p. +  CD-ROM.

Zwiers, Y., 2002, Ground penetrating radar modeling of dinosaur bones: thesis, U. Utrecht, The Netherlands, 120p.
more in progress

Scientific and Public Service.
Adjunct Professor, Univ. of So. California, Depts. of Petroleum and Chemical Engineering, 77-80.
Adjunct Professor, University of Colorado, Dept. of Geology, 80-85
Adjunct Professor, Colorado School of Mines, Dept of Geophysics, 85-94
External examiner on PhD theses: Univ of New South Wales (Australia), Univ of British Columbia (Canada), Univ
of Hyderabad (India), Cairo Univ (Egypt), Helsinki Univ of Technology (Finland)
Reviewer for Geophysics, Jour. Geophys. Res., Geophys. Res. Lttrs., ASTM Geotech. Testing Jour., Can. Jour. Earth Sci., Earth & Planet. Sci. Lttrs., PAGEOPH, Log Analyst, IEEE Trans. Geosci. Electron., Geophys. Prosp., SCIENCE, Rev. Geophys. and Space Phys., Appl. Phys. Lttrs., Icarus, Rem. Sens. Environ., Radio Sci., Phys. Earth Planet. Inter., Explor. Geophys., NRC Army Res. Board, NASA, NSF, DOE, EPA, NBS, SME/AIME, EPRI, GRI, Florida Inst. for Phosphate Res., Australian Research Grants Scheme, NRC of Canada, etc.

Committees to render scientific judgement.
Session chairman, Society of Exploration GCeophysicists Annual Meeting, 1976, 1989, 1990.
Chairman, Subcommittee on Electrical Standards of the Mining Committee of the Society of Exploration Geophysicists, 9/77-9/80.
Member, Mining committee of the SEG, 77-84
Member, ASTM Committee E-31 on Computerized Laboratory Systems, 10/78-
Member, ASTM Committee E-16 on Sampling and Analysis of Metal Bearing Ores and Related Materials, 11/78-
USGS Agency representative, NRC/NAS ad hoc Committee on Geological and Materials Sciences, 5/78.
Member, DOE/DGE Advisory Committee on Physical Properties of Rocks, 2/78-2/80.
Member, ASTM Committee D-18 on Soil and Rock, 2/79-
Chairman, ASTM Subcommittee D-18.06 on the Physico-chemical Properties of Soil and Rock, 4/79-6/86
Member, International Editorial Board, International Journal of Thermophysics, 6/79-12/85
Member, Branch Promotion Committee, 1980
Member, Geologic Division review of Engineering Geology Program, 2/80
Member, USGS Ad hoc Committee for Program Statement on Waste Containment in Crystalline Rocks, 5/80
Member, Soc. Prof. Well Log Analysts Publication Committee, 7/80-7/81
Member, NASA Imaging and Radar Panel of the International Comet Review Committee, 8/80
Member, Geologic Division review of U/Th Program, 2/81
Member, Water Resources Division review of Spectroscopy Project, 4/81
Member, US Bureau Mines Committee to forecast use of advanced exploration technology in copper industry, 9/81.
Advisor, EPA on geophysical evaluation of toxic waste dumps, 1981-1995.
Advisor, U.S. Congress Office of Technology Assessment on future technology for strategic mineral assessment, 12/82.
Chairman, SEG Mining Committee Luncheon, 1983
Member, Branch Computer Committee, 1983
Member, Downhole Measurements panel, Advanced Ocean Drilling Program, 12/83-12/88
Member, Chief Geologist's Science Advisory Committee, 12/84-9/87
Member, SEG, Engineering Comm., 84-93
Member, Organizing Committee, SPE Forum on Open Hole Well Logging, 11/84-8/85
Member, CSDP adhoc committee on core requirements, 11/84-2/85
SEG Representative, US National Committee for Rock Mechanics (member, Panel on Nat'l. and Int'l. Activities,
1984, member Exec. Comm., 1985-1986), 6/83-1986 (chairman, Annual Review Panel, 1985-1986)
Associate Editor for Rock Properties, Geophysics, 1/85-12/87
Member, DOSECC Sci. Adv. Comm., 4/85-1/88
Member, DOSECC Downhole Measurements Advisory Panel, 12/85-1/88
Member, DOSECC Cajon Pass Science Exp. Panel, 12/85-7/88
Advisor, DOT/FHwy A, ground-penetrating radar testing of geological structure under interstate highway road beds (11/85-1988)
Advisor, DOI Office of Surface Mining, mine subsidence, (12/86-1988)
Member, USGS Graduate Training Panel, 12/85, 12/86
Chairman, Panel on Annual Review of U.S. Progress in Rock Mechanics, 1985-1986
Member, U.S. EPA/Air Force Expert Panel on Organic Contaminant Problems, 4/86-11/86
Chairman, DOSECC Data Management Panel, 6/87-1/88
Member, MGLS/SPWLA Technological Panel, 9/87-1988
Member, Director's Information System Council Subcommittee on Supercomputers, 11/87-1988
Member, NSF/STC review panel, 11/89
Member, Mars Rover Sample Return Science Working Group, 2/89-12/89
Member, Mars Science Working Group, 12/89-12/92
Associate Editor, The Log Analyst, 6/88-1989
Associate Editor for EM, Geophysics, 7/89-6/91
USGS Chief Geologist's Committee for Advanced Computing, 7/88-90
Continental Sci. Drilling Forum, 1989-6/93
Conference Chair, Third Int’l Conf on Ground Penetrating Radar, 1992
DOE EM-50 Core Planning Group, 7/92-94
DNA Sampling, Coring Logging Working Group, 9/92
NSF/DOE/USGS CSDP Forum, 10/92
organizing comm., 4th Tunnel Detection Symposium - Subsurface Exploration Technology 4/93
DOE CMST Review Panel, 5/93, 4/94, 5/95, 4/96, 4/98
USAF/ARPA/DIA AB-GPR Review, 6/93
Member, SEG Near Surface Section 93-
DOE Arid-VOC-C&M TSG, 7/93, 11/93
DOE BES Review Panel, (Chairman) 9/93
WGA/DOIT Comm./Military Munitions Waste Working Group 9/93-4/96
(chair, Tech Transfer and Education subpanel, 9/95-96)
Chair, Conference Site Selection Committee, 4th Int'l Conf. on GPR (1992), 5th (1994), 6th (1996), 7th (1998)
CRC for Waste Management and Pollution Control Ltd (Australia)
Integrated Mapping Technologies Project Advisory Committee 5/94-5/95
Organizing Committee, 6th Intl GPR Conf., Japan, 7/94-9/96
DOE VETEM Review Panel (chair) 7/94-9/96
NAS/NAE/NRC/TRB Panel NCHRP Project 20-5, Topic 26-08, Ground Penetrating Radar
for evaluating subsurface conditions for transportation facilities, 1994-1998
CSM Geophysics Dept. Tenure Committee, 11/94-
DOE Fractured Rock Infiltration TSG, 5/95-96
EPRI Ground Penetrating Radar Project Technical Review, 6/95-96
Co-Chair, IUGG Environmental Geophysics Session, Boulder, 7/95.
SAGEEP’96 Organizing Committee, 6/95-4/96
USAF Geophysics Expert Panel, 1994-1995
NAS/NAE/NRC SITE Committee for non-invasive characterization of the shallow subsurface
for environmental and engineering applications, 1995-1997
CSM Geophysics Dept Graduate Advisory Committee, 9/95-
CSM Geophysics Dept Undergraduate Advisory Committee, 9/95-
CSM Research Council, 10/95-1/98
CSM Geophysics Dept PhD Comprehensive Exams Committee, 11/95-11/98
DOD Permanent UXO Committee, 4/96-
Chair, GPR Users International Committee, 9/96-5/98
CSM Faculty Senate, 11/96-12/98 (senate subcommittees: Handbook, Institutional resources)
Assoc. Editor, Geophysics, Ground Penetrating Radar, 11/97-8/99
CSM Senate Executive Committee, 1/98-12/98
NASA PIDDP review panel, 11/98
CSM Salary & Benefits Committee, 12/98-
NSF SBIR Review panel, 9/99
NASA Mars Soil & Dust Review Panel, 10/99
CSM GP Dept. ABET Review Faculty Lead, 2000
DOE SBIR review panel, 2000
Organizing committee, Conf . on the Geophysical detection of subsurface water on Mars, 2001
SERDP review panels, 2001
NASA Mars Lander GPR study team, 2001
NASA Mars facility orbiter radar sounder experiment team, 2001

Misc Advisory Groups
Advisor, Dept. of Geology & Dept. of Archeology, Univ. of Colorado, using ground penetrating radar to find "lost" Mayan ruins, Ceren, El Salvador, 6/79.
Consultant, USGS/WRD, DOE and NRC, using ground penetrating radar to find lost buried radioactive waste trenches at Beatty, NV, 11/80.
Consultant, USGS Astrogeology, JPL & NASA on electrical properties of dry desert sands to interpret Shuttle SIR-A data, 7/82-date
Consultant, Bureau of Reclamation, using ground penetrating radar to survey leaks in dams (Ochoco Dam, Crooked River Project, Prineville, OR, 2/82; Big Sandy Dam & Project, Eden, WY, 10/82).
Consultant, DOE/WAPA using ground penetrating radar to find lost utilities and map shale layers, 8/82.
Consultant, U.S. Army WES, geotechnical applications of ground-penetrating radar (7/85-date)
Advisor, CBI, applications of geophysics to criminology.
Consultant, Navy EODTECHCEN, using ground penetrating radar to find lost live ordnance, Kahoolawe, HI, 6/81.
Advisor, Chevron, Exxon, Amoco, Mobil, Schlumberger, Shell, SOHIO, ARCO, Stanford Univ., CIRES, HIG on requirements for setting up electrical properties measurement laboratories.
Abstractor for Mineralogical Abstracts
Registered Professional Engineer, Province of Ontario, 1974-1975
Listed in Who's Who in the West,....in Government, ..in Frontier Science & Technology
American Men and Women of Science
Volunteer Reader, Recordings for the Blind
Member, Board of Directors, Kipling Club and Amberwick Townhouse Associations
Member, Board of Directors, Colorado Photographic Arts Center, 1984-1996

Honors & Awards
National Merit Scholarship of the Quaker Oats Foundation, 1967-1971.
"Best Presentation Award", Mining Session, 42nd International Meeting of the Society of Exploration Geophysicists, 1972.
Lunar Science Group Achievement Award, 1975.
$1,000.00 cash incentive award, 1983.
AGU Best Reviewer, 1984.
DOI Meritorious Service Award and Silver Medal, Sept., 1989.
Hal Mooney Award from the Near Surface Geophysics Section of the Society of Exploration Geophysicists, 1999 (citation)

Career experience
Dates Brief description of work or position
From To
8/70       6/72 Consultant, Ledgemont Laboratory, Kennecott Copper Corporation, Lexington, MA: Director sponsored research investigating geophysical exploration methods - dielectric systems, induced polarization, magnetic loss, and electromagnetic surveying.
8/71          Electrical engineer, National Aeronautics and Space Administration, Manned Spacecraft Center, Houston, TX: designed electrical properties measurement system for lunar sample studies from 10 to 107 Hz, in vacuum to 10-8 Torr, at temperatures from 25-900oC.
9/71       6/72 Research assistant, Massachusetts Institute of Technology, Dept. of Electrical Engineering and Francis Bitter National Magnet Laboratory, Cambridge, MA: performed measurements and computer modelling of magnetic loss in electromagnetic systems.
7/72       7/73 Scientist, Lockheed Electronics Co., Houston Aerospace Systems Division, Houston, TX:developed techniques for studying physical properties of lunar samples under laboratory simulated lunar conditions. Co-investigator of NASA Lunar Sample Program project "Electrical Properties of Lunar Samples" and lunar sample sub-curator for Physics Branch, NASA Johnson Space Center.
9/73       7/75 Research Engineer, Dept. of Physics, Univ. of Toronto; David W. Strangway, Professor. Investigated the electrical properties mechanisms in lunar and terrestrial rocks, their correlation with other physical properties, and their variation under controlled environments (cryogenic to 1400oC, ultra high vacuum to high pressure, oxygen fugacity, water content, etc.). Lunar sample curator for Geophysics Laboratory. Consultant to Kennecott Copper Corp. and the Geological Survey of Canada.
7/72 4/88 Co-Investigator in NASA Lunar Sample Program.
8/75 10/94 Research geophysicist GS-15/8, U.S. Geological Survey, Branch of Petrophysics and Remote Sensing; Ken Watson, Branch Chief (75-80) and Graham Hunt, Branch Chief (80-81). Developed and operated the Petrophysics Laboratory, performing research on the physical properties of rocks and minerals under laboratory simulated conditions of their natural environments. These investigations resulted in compilations of fundamental physical properties data, models of the physical and chemical mechanisms behind the observed data, and new directions for the application of field geophysics.
8/75 9/88 Project Chief - Geothermal Petrophysics 9790-01699
7/76 10/81 Principal Investigator - ERDA/DOE DGE 9790-70037
These two projects investigated the physical properties of geological materials from geothermal systems in lab simulations of high-temperature, high-pressure hydrothermal environments. Results to date have included data and models of the electrical, seismic, textural, and thermal properties of rocks in geothermal systems with full physical and chemical environmental conditions to 2 km deep in hydrothermal systems and partial environmental control to 40 km deep in magmatic systems. One conclusion was the necessity for free water to play a larger role in the physical properties of the lower crust than had been previously thought. The project is continuing by measuring the properties of alteration products and similar materials which have been little studied.
10/76 10/77 Project Chief - Chemical Resources Petrophysics 9790-01862
This project was a laboratory investigation of the physical properties of oil shale and lithium clays, producing measurements in support of other field-geophysical projects.
10/76 1/83 Project Chief - Mineral Resources Petrophysics 9790-01861
This project has a long term goal of producing a comprehensive catalog of the physical properties of minerals, and a representative statistical description of the physical properties of rocks. Preliminary catalogs of the density and dielectric properties of minerals and rocks have already been published. This project also is producing models of water-mineral physical chemical interactions in support of induced polarization and complex resistivity phenomena for use in the interpretation of geophysical exploration studies in mineral exploration. This project and the next project resulted in the invention of the nonlinear complex resistivity logging technique and its application to mineral problems.
10/77 10/81 Project Chief - Uranium Petrophysics 9790-02059
This project investigated the electrical and textural properties of uranium and associated minerals found in uranium mineral deposits. The project produced laboratory measurements on core samples in support of the borehole logging projects, and it developed models of induced polarization and complex resistivity within and near ore zones. Invented the nonlinear complex resistivity laboratory core measurement apparatus and borehole logging equipment. The nonlinear complex resistivity measurements produce detailed information about water-rock chemical interactions, which are not yet fully understood. They have been used, however, to successfully delineate barren lithologies from those bearing metallic oxides and sulfides which undergo oxidation-reduction reactions from those bearing clays or zeolites that exhibit strong cation exchange reactions.
6/77 1/79 Principal Investigator - NASA SR&T Program 9790-70046
This project produced laboratory measurements of microwave scattering parameters in a vacuum microwave-anechoic chamber to assist in the interpretation of lunar and planetary microwave radar and radio metric measurements and in the design of future space missions (such as the Venus Orbiting Imaging Radar).
1/78 6/79 Principal Investigator - NASA Planetary Geology Program 9790-70026
This project produced data and predictions on how some terrestrial exploration techniques such as complex resistivity and ground penetrating radar might be used to explore Mars.
5/77 9/78 Project co-investigator - Used ground penetrating radar and other geophysical tools to help Oscar Ferrians determine the environmental impact of the Trans-Alaska Pipeline on tundra and permafrost problems. Demonstrated the utility of the ground penetrating radar to map and detect variability in the permafrost caused by natural and manmade events (such as the construction of a road).
11/80 8/81 Acting Chief, Branch of Petrophysics and Remote Sensing during the illness of Graham Hunt.
8/81 1/83 Supervisory Geophysicist, Branch of Petrophysics and Remote Sensing; Bob Tilling, Chief, Office of Geochemistry and Geophysics.
As Branch Chief, I supervised about 90 people located in Denver, CO, Reston, VA, Menlo Park, CA, and Flagstaff, AZ with an annual budget of about $4,000,000. Wrote and implemented a computer program to track and predict fiscal and personnel matters for the Branch. Participated in the successful fight to return control of the Fairchild-Porter aircraft to the Branch from the Office of Aircraft Services.
10/82 12/89 Principal Investigator - DOE LLRWP Surface Geophysics
2/83 10/94 Research Geophysicist, USGS Branch of Geophysics; Ray Watts, Jeff Daniels, Dal Stanley, Dave Fitterman, Chief, Shallow Crustal Geophysics Section After resurrecting the "pre-Branch Chief" era projects, the tools of the Petrophysics Laboratory, ground penetrating radar, nonlinear complex resistivity, and induction electromagnetics are being used to attack problems of radioactive and chemical waste disposal and migration. The induction EM techniques quickly find inorganic contaminants. The NLCR technique identifies in situ clay/organic reactions. The ground penetrating radar maps detailed stratigraphic cross-sections. The combination yields information of value to hydrologic modelers, and provides a non-invasive technique to locate and monitor waste interactions with ground water and minerals.
2/83 10/94 Project Chief- Toxic Waste Geophysics 9380-03587 WRD
2/83 4/84 Principal Investigator - EPA Plume Sensing: feasibility of using complex resistivity to locate underground contaminants DW14930191-01-1
8/84 10/88 Project Chief - NLCR Clay-Petroleum Reactions 9380-03824
This project is using nonlinear complex resistivity logging to observe clay-organic reactions, attack the shaly-sand problem, and investigate petroleum formation processes that are still active today.
7/85 12/87 P.I., U.S. Army Corps of Engr. WES - geotechnical applications of ground-penetrating radar.
6/86 9/86 P.I., DOT/FHwy/Colo. Div. Hwy. applications of ground penetrating radar to transportation and road problems
11/86 9/87 P.I., joint USGS/Amoco petroleum slimhole wireline logging and hole-to-hole test project
2/87 5/87 co-P.I., OSM geophysical detection of abandoned mine cavities.
4/87 10/94 P.I., U. S. EPA Superfund toxic waste geophysics expert system.
5/87 4/93 P.I., U.S. Army tunnel detection radar/tomography processing software and expert interpretation.
Invented new automatic hole-to-hole radar velocity/attenuation/dispersion/diffraction tomography data processing, modeling and confidence-estimation system.
1/88 12/89 Co-I., EPRI Compressed Air Storage Project; oxygen uptake of clays and sulfides.
5/88 12/91 P.I., U.S. EPA Superfund Research Program; mapping clay-organic and inorganic plumes with complex resistivity. Invented new 16-channel nonlinear complex resistivity system.
5/88 9/94 P.I., U.S. EPA Research Program; Waterloo/Borden organic solvent spill project. Invented new hole-to-hole borehole radar logging system.
10/88 11/94 Co-I., NASA Space Shuttle SIR-C (paleohydrology of deserts).
12/88 5/89 P.I., Participating Scientist; NASA/USSR Phobos Mission GRUNT Project.
11/90 2/92 P.I., NASA Planetary Instrument Development Program, Mars EM Rover.
12/90 11/96 P.I., Participating Scientist, NASA/USSR Mars '94/’96 Mission.
5/93 10/94 P.I., ARPA/ARL Airborne GPR test program

11/94 date Professor of Geophysics, Colorado School of Mines
Consultant to Caterpiller, ASEC, GSSI, EPRI, CH2MHill, COLOG, ESSLLC, Ball Aerospace, Puffin Investments
5/95 6/98 P.I., AFOSR Noninvasive Complex Resistivity Measurements of Clay-Organic Processes to Map Organic Contamination and Degradation of Clay Barriers
8/96 3/98 P.I., Mission Research Corp./USAF, Complex resistivity geophysics demonstration at Hill AFB and Dover AFB Intentional PCE Spill Geophysics Test Cell. Invented new 96-channel nonlinear complex resistivity measurement system.
1/97                Invented new multifrequency borehole radar logging tool.
5/97 date        Invented new GRORADAR(tm) data acquisition, display, processing and modelling software
6/98 8/00        P.I., Newmont Metallurgical Services, Complex resistivity to monitor bioleaching of gold ore
8/98 2/01         P.I., Blackhawk/Geometrics/SERDP Complex resistivity demonstration
9/99 date         Co.I., NSF, A Three-Dimensional Porous-Media Intermediate-Scale Test Bed Facility for Investigation of Fate and Transport of Chemicals in the Subsurface
7/01 02/02      P.I. Blackhawk/DOE Implementation of geophysical techniques for DNAPL delineation: hole-to-hole complex resistivity
7/01  date       Co.I. E.T.Selig/FRA/BNSF Railroad substructure evaluation
10/01 date      Co.I. Blackhawk/NASA Naiades Mars Scout Concept Study to search for water on Mars

Invited seminars at university and industrial groups: (40 minutes or more)
Institute of Geophysics, University of Alaska, Fairbanks, 4/78
Chevron Oil Field Research Laboratories, La Habra, 6/78
University of California, Berkeley, 6/78
Los Alamos Scientific Laboratories, Los Alamos, 8/78
BRGM, Orleans, France, 10/78
Potomac Geophysical Society, Washington, DC, 10/78
University of California, Berkeley, 12/78
Schlumberger-Doll Research Center, Richfield, CT, 1/79
MIT Club of Denver, CO, 3/79
Society of Petroleum Engineers Forum, Carbondale CO, 7/79
CSIRO Div. of Mineral Physics, Sydney, Australia, 12/79
CSIRO Div. of Mineral Chemistry, Melbourne, Australia, 12/79
Bureau of Mineral Resources, Canberra, Australia, 12/79
CIRES, University of Colorado, Boulder, 3/80
CINDAS and Dept. of Geology, Purdue University, Lafayette, IN 3/80
Water and Power Resources Services, Denver, CO, 7/80
Stanford University, Stanford, CA, 12/80
Newmont Mining, Tucson, AZ, 1/81
University of Miami, Miami, FL, 1/81
Mining Geophysicists of Denver, CO, 12/81
Texas A&M University, College Station TX, 9/82
Formation Evaluation Society, Grand Junction, CO, 11/82
IEEE APS/MTT/GRSS, 3/84
CIRES, U. Colo., 5/84
Chem. Eng. Div., NBS, Boulder, 4/84
Exxon R & D, Houston, TX, 6/84
Min. Geophys. Denver, CO, 9/84
ARCO, Dallas, TX, 11/84
RMAG, Denver, CO, 2/85
KEGS, Toronto, Canada, 5/85
University Toronto, 5/85
Schlumberger-Doll, 5/85
Core Labs (Distinguished Lecture Series), Dallas, TX, 10/85
Heriot Watt University, Edinburgh, Scotland, 5/86
Mining Geophysicists of Denver, 5/86
Amoco, Tulsa, 11/86
Bromwell-Carrier, Lakeland, FL, 2/87
Colorado School of Mines, Golden, CO, 3/87 (two)
Chevron Oil Field Research Laboratory, La Habra, 8/87 (two)
Amoco Research Center, Tulsa, OK, 8/87
Colorado School of Mines, Golden, CO, 11/87
U.S. EPA/EMSL, Las Vegas, 12/87
Indianna Univ., Bloomington, 4/88
MIT, Cambridge, 4/88
MRSRSWG, Flagstaff, May 1989
INEL/CPP, June, 1989
Univ. Waterloo, Ontario, June, 1989
Colorado School of Mines, Golden, Oct., 1989 (twice)
EPRI, Palo Alto, Dec., 1989
Caltech/JPL, Pasadena, Dec., 1989
CSM, Golden, April, 1990
Univ. Nevada, Mackay School of Mines, Reno, Nov., 1990
CSM, Golden, Dec., 1990
Marathon Oil, Littleton, Feb., 1991
USEPA, Las Vegas, Feb., 1991
SWRI, San Antonio, March, 1991
MIT, Cambridge, Feb., 1992
Sigma Chi - CSM, Golden, Feb., 1992
MITRE, Arlington, VA, May, 1992
Stanford Univ. Palo Alto, May 1992 (2 lectures plus field day)
ERIM, Washington DC, Aug., 1992
Oregon Graduate Institute, Beaverton, Aug 1992
Radian Corp., Austin TX, Sept., 1992
Univ. Toronto, Sept 1992
MIT, Cambridge, Oct 1992
MIT, Cambridge, Apr 1993
Univ. Wisconsin, Madison, Apr 1993 (2 lectures)
Indiana Univ., Bloomington, Apr 1993 (2 lectures)
CSM, Golden, Apr 1993
CSM, Golden, Nov 1993
DEMEGS/CSM, Golden, Sept 1994
USGS, Denver, Nov 1994
UNSW (Australia) Water Research Laboratory, Dec 94
UNSW (Australia) Munro Civil and Environmental Engineering Lecture, Dec 94
Australian Defense Industries, Sydney, Dec 94
Caterpillar, Peoria, IL, June 95
Western Atlas Wireline, Houston, July 95
Caterpillar, Peoria, IL, Sept 95
MIT, Cambridge, Dec 95
Caterpillar, Brooklyn Park, MN, Jan 96
CSU, Dept Anthropology, Ft. Collins, CO, Mar 96
Schlumberger-Doll, Ridgefield, CT, Apr 96
Caterpillar, Peoria Proving Ground, 11/97
Hill AFB, Layton, UT, Mar 98
Utah State Univ. Water Lab, Ogden, UT, Mar 98
Schlumberger, Cambridge, England, Apr 98
UC Berkeley, Aug 98
Ball Aerospace, Broomfield, Nov 98
CSM Environmental Science and Engineering Division Seminar, 1/00
DOE INEEL, Idaho Falls, ID 2/00
CU Dept of Geology 4/00
Newmont Mining 2/01
NAS/NRC Coal Board, Coal Waste Impoundments, 6/01
NASA/Italian Space Agency/Canadian Space Agency satellite Mars conf., 10/01
CU Astrogeology, 10/01

Invited presentations at conferences, workshops and related events (no proceedings or abstracts):
Univ of Utah Rock Festival, Salt Lake City, 5/73
Univ of Utah Geothermal Workshop, Snowbird, UT, 11/77
Public Meeting on Environmental Impact of Trans-Alaska Pipeline, Anchorage, 12/77
Permafrost Committee of Polar Research Board of National Research Council, San Francisco, 12/77
DOE/DGE Ad Hoc Committee on Physical Properties, 2/78
Workshop on Geological Investigations NTS Terminal Waste Storage, 10/78
DOE Geoscience Program Review, 1/79
Sandia Laboratories Magmatap Review Panel, 11/79
DOE S.P. Workshop, 2/81
ASTM Seminar on Electrical Properties of Marine Sediments, 1/82
ASTM Workshop on ground penetrating radar, 1/82
Clay Min. Soc. Workshop on Clays and Log Anal., 9/84
SPE Forum on Open Hole Well Logging, 8/85
Colo. Div. Highways, 1986 Materials Eng. Conf., 3/86
USGS Environ. Geochem. Workshop, 4/86
EPA Tech. Transfer Symp., Las Vegas, 11/86
DOE Not Yet Visible or Recoverable Hydrocarbons Workshop, Houston, 5/87
Director's Special Seminar, "On the Future of Geophysics", Reston, 6/87 (two)
Assoc. of Hazardous Materials Professionals, UCSD, La Jolla, 7/87
National Park Service, Acid Rain Stone Group, Denver, CO 12/87
Transportation Research Board Annual Meeting, Washington DC, 1/88
USGS Workshop to Define Next Geologic Workstation, Reston, 2/88
tutorial & keynote Second International Conference on Ground Penetrating Radar, Gainesville, 3/88
Symposium on the Application of Geophysics to Engineering and Environmental Problems,
radar tutorial, Golden, 3/88
Artificial Intelligence Special Interest Group, Reston, 4/88
American Petroleum Institute Pipeline Conference, Houston, 4/88
USGS-EPA Workshop on Geologic Mapping, Denver, 5/88
NASA Human Exploration of Phobos Workshop, Palo Alto, 8/88
NSF Continental Scientific Drilling Workshop, Palo Alto, 8/88
Workshop on Geoscience from a Lunar Base, Houston, 8/88
Chevron Integrated Formation Evaluation Workshop, Denver, 8/88
DOE 10th Low Level RadWaste Conference, Denver, 8/88
NASA Workshop on Exploration of Mars with Rovers, Pasadena, 9/88
SPWLA Formation Evaluation by Electrical Methods Symposium, Texas, 10/88
Phobos Workshop, Moscow, USSR, Feb., 1989
TNT Expert Panel, Seoul, Korea, May, 1989
Science on Manned Mars Mission Workshop, NASA Ames, August, 1989
SEG Ground Penetrating Radar Workshop, Dallas, Nov., 1989
NSF/EPRI Dynamic Soils/Earthquake Workshop, Palo Alto, Nov., 1989
EPA National Technical Info. Conf., Kansas City, Nov., 1989
USGS Global Change Workshop, Asilomar, Jan., 1990
SAGEEP, Lakewood, March, 1990
DOE Basic Research for Environmental Restoration, March, 1990
EPRI/DOE LLRW Compact, Palo Alto, March, 1990
three tutorials, Third Int’l. Conf. on GPR, Lakewood, CO, Apr 1990
USGS Environmental Forum, Denver, June, 1990
UCSD/AHWP Workshop, San Diego, July, 1990
UCD/NSF Hazards Workshop, Davis, July, 1990
SEG Site Characterization Workshop, San Francisco, Sept., 1990
UAz/NRC Fracture Workshop V, Tucson, Jan., 1991
Univ. Waterloo, Borden Spill Project Review, Waterloo, Jan., 1991
USEPA/DNAPL Workshop, Dallas, April, 1991
DNA Workshop, Washington, DC, April, 1991
EPA Emergency Response, Edison, NJ, May, 1991
DOE-USGS, Washington, DC, June, 1991
DOE, Rocky Flats, Denver, 1991
DOE, Noninvasive Geophysics Workshop, Dallas, Sept., 1991
EPA, DNAPL II, Dallas, Sept., 1991
DOE-USGS, Reston, Oct., 1991
ASCE, Orlando, Oct., 1991
SEG, Site Characterization Workshop, Houston, Nov., 1991
NASA Mars Environmental Workshop, Cleveland, Nov., 1991
Caltech, NASA Mars SEI Workshop, Pasadena, Dec., 1991
USGS Mirror Lake Program Review, Menlo Park, Jan., 1992
Univ. Waterloo-EPA Borden Review, Waterloo, Jan., 1992
NASA Ames Mars Workshop, Mountain View, Jan., 1992
NASA Lunar Robotics Workshop, Houston, Feb., 1992
DOE Arms Control review, Washington DC, Feb., 1992
EPA/Waterloo Solvents in Groundwater Program review, Toronto, Ontario, Mar., 1992
NASA SEI briefing on Mars, Houston, Mar., 1992
OR&D Airborne Geophysics Workshop, McClean, VA, Mar., 1992
Army/WES GPR Workshop, Vicksburg, MS, Mar., 1992
DOT-FHWy-FBI GPR briefing, Chicago, May, 1992
DOE TIE Workshop, Albuquerque, NM, May, 1992
Keynote speaker, Fourth Int'l. Conf. on GPR, Rovaniemi, Finland, Jun., 1992
DOE EM-50 Core Planning Group, Dallas, June., 1992
DNA Hydroplus Site Conditions, Alexandria, VA, Aug., 1992
Water & Environment Federation, New Orleans, Sept., 1992
DNA SCL Working Group, Las Vegas, Sept., 1992
EPA/Waterloo Solvents in Groundwater Program review, Toronto, Ontario, Sept, 1992
SEG, Environmental Problems, Geophysical Solutions, New Orleans, Oct., 1992
NPS, Great Sand Dunes National Monument Research Symposium, Nov., 1992
DOI HazMat Workshop, Denver, May 1993
NPS Dunes Research Review, Denver, May 1993
EEGS 'Denver Section', Golden, Sept 1993
DOE INEL Radar Workshop, Idaho Falls, Sept 1993
EPA/Waterloo Solvents Program review, Toronto, Ontario, Oct 1993
2nd GPR Govt Users Workshop, Columbus, Oct 1993
DOE TIE, Denver, Nov 1993
Keynote address to 3rd GPR Govt Users Workshop, Columbus, Dec 1994
USAF Geophysics Expert Panel, Atlanta, GA, Jan, 95
USAF Center for Environmental Excellence, San Antonio, TX, Feb, 95
Keynote address to SAGEEP'95, Orlando, FL, Apr, 95
Univ. Colo. GPR in Archaeology Workshop, Boulder, May, 95
USAF Dover AFB GRFL Geophysical Cell Controlled Spill, Sept, 96
USGS Advanced workshop on integrated uses of geophysics in hydrology and geology, Golden, Nov , 96
NASA Ames Deep Water on Mars Worksop, Jan, 98
GPR'2000, Advanced GPR Processing and Modeling Workshop, Australia, 5/00


Invited papers at conferences published as abstracts: (invited full papers are annotated in bibliography)
Olhoeft, G.R., 1978, Guide to the use of laboratory electrical measurements for interpretation, in Wait, J.R., ed., EM Guided Waves in Mine Environments, Boulder: CIRES p. 276.
Olhoeft, G.R., 1978, Surficial mapping and in situ electrical measurements by impulse radar: EOS Transactions, v. 59, p. 1055.
Olhoeft, G.R., 1981, Complex resistivity spectra by linear regression analysis: Geophysics, v. 46, p. 464.
Olhoeft, G.R., 1981, Nonlinear complex resistivity logging: theory, laboratory and field: Geophysics, v. 46, p. 466
Olhoeft, G.R., 1981, Electrical properties of crustal and upper mantle materials, in Proceedings International Association of Geomagnetism and Aeronomy, Edinburgh, August, 1981: International Association of geomagnetism and Aeronomy Bulletin, no. 45, Programme and Abstracts, N. Fukishima, ed., p. 133
Olhoeft, G.R., Daniels, J.J., and Scott, J.H., 1981, Physical properties of the UPH-3 drillhole: EOS, v. 62, p. 387-388
Olhoeft, G.R., 1983, Geologic noise: the limit of accuracy and resolution, p. 123-124 in Abstracts: The Third Biennial Conference of the Australian Society of Exploration Geophysicists, Brisbane, Queensland, Australia, 31 October- 3 November, 1983 (keynote address).
Olhoeft, G.R., 1984, In-situ geochemical measurements in boreholes: International Symposium on Observations of the Continental Crust through Drilling, Tarrytown, NY, May 20-25, p. 30
Olhoeft, G.R., 1984, Applications of geophysics to LLRW sites: DOE Low Level Waste Management Program Participants Conference, 6th, Denver, CO, Sept. 11-13, p. 28 CONF-8409115.
Olhoeft, G.R., 1985, Electrochemical properties of rocks and minerals: J. Electrochem. Soc., v. 132, p. 115C.
Olhoeft, G.R., 1986, Geophysical methods of contaminant detection, in U.S. Geological Survey Program on Toxic Waste--Ground-Water Contamination, Proceedings of the Second Technical Meeting, Cape Cod, Mass., Oct. 21-25, 1985: U.S. Geological Survey Open-File Report 86-481, p. A7.
Olhoeft, G.R., 1985, Ground-penetrating radar images of the unsaturated zone: EOS Transactions, v. 66, p. 881.
Olhoeft, G.R., 1987, Geophysical techniques to detect ground water contaminants, in Perceptions of ground water contamination symposium, Assoc. Ground Water Sci. and Engrs. Program at NWWA Annual Meeting, Sept. 14-16, 1987, Minneapolis, p. 19. (also published in Groundwater, v. 25, p. 603)
Olhoeft, G.R., 1988, Observing physical and chemical processes in action, 66th Jahrestagung der Deutschen Mineralogischen Gessellschaft, Bonn, West Germany, Sept. 11-18, 1988 (keynote address; withdrawn: foreign travel denied).
Olhoeft, G.R., 1988, Hydrogeologic characterization with geophysics, in GSA Centennial Meeting, Hydrogeology Division Symposium, November, 1988, Denver, CO, GSA Abstract with Programs, v. 20, p. A236.
Olhoeft, G.R., 1989, Complex resistivity logging to monitor geochemical processes: in Abstract booklet, American Society for Testing and Materials Symposium on Geophysical methods for geotechnical investigations, June 29, 1989, St. Louis, MO, p. 5.
Olhoeft, G.R., 1989, Geophysical characterization of hazardous waste sites: in Abstracts, 28th International Geology Congress, Washington, D.C., July 9-19, 1989, v. 2, p. 545-555.
Olhoeft, G.R., 1989, Geophysics advisor expert system: in Abstract booklet, American Society for Testing and Materials Symposium on Geophysical methods for geotechnical investigations, June 29, 1989, St. Louis, MO, p. 19.
Olhoeft, G.R., 1997, Dispersive electromagnetic loss mechanisms in ground penetrating radar: in Proc. PIERS, July 7-11, 1997, Cambridge, MA, p. 341.
Olhoeft, G.R., 1997, Surface and borehole GPR in 3D versus time and frequency: in Proc. PIERS, July 7-11, 1997, Cambridge, MA, p. 350.
Olhoeft, G.R., 1997, Characterization of electromagnetic scatterers in dispersive soil: in Proc. PIERS, July 7-11, 1997, Cambridge, MA, p. 552.
Olhoeft, G.R., 1998, Tracking DNAPL spills with ground penetrating radar and complex resistivity: GEOSCIENCE ’98, Keele, England, April 16, 1998, p. 130. (invited keynote address).

Bibliography of Publications (excluding contributed short articles and abstracts)(* invited)
1. Olhoeft, G.R., 1972, Time dependent magnetization and magnetic loss tangents: Cambridge, Massachusetts, Massachusetts Institute of Technology, Dept. of Electrical Engineering, M.S.E.E. thesis, 94p.
2. Olhoeft, G.R., Frisillo, A.L., and Strangway, D.W., 1972, Frequency and temperature dependence of the electrical properties of a soil sample from Apollo 15, in The Apollo 15 Lunar Samples: The Lunar Science Institute, Houston p. 477-481.
3. Chung, D.H., Westphal, W.B., and Olhoeft, G.R., 1972, Dielectric properties of Apollo 14 lunar samples, in Lunar Science Conference, 3d, Proceedings: Geochimica Cosmochimica Acta, sup. 3, p. 3161-3172.
4. Strangway, D.W., Chapman, W.B., Olhoeft, G.R., and Carnes, J., 1972, Electrical properties of lunar soil --- dependence upon frequency, temperature, and moisture: Earth and Planetary Science Letters, v. 16, p. 275-281.
5. Olhoeft, G.R., Frisillo, A.L., and Strangway, E.W., 1973, Lunar sample electrical properties in Lunar Science Conference, 4th, Proceedings: Geochemica Cosmochimica Acta, sup. 4, p. 3133-3149.
6. Olhoeft, G.R., Frisillo, A.L., Strangway, D.W., and Sharpe, H., 1973, Lunar solid sample electrical properties, Lunar Science IV: Lunar Science Institute, Houston, p. 575-577.
7. * Olhoeft, G.R., Strangway, D.W., Pearce, G.W., Frisillo, A.L., and, Gose, W.A., 1973, Electrical and magnetic properties of Apollo 17 soils: EOS, v. 54, p. 601. (invited)
8. Olhoeft, G.R., Frisillo, A.L., and Strangway, D.W., 1974, Electrical properties of lunar soil sample 15301,38: Journal of Geophysical Research, v. 79, p. 1599-1604.
9. Olhoeft, G.R., Frisillo, A.L., Strangway, D.W., and Sharpe, H., 1974, Temperature dependence of electrical conductivity and lunar temperatures: The Moon, v. 9, p. 79-88.
10. Olhoeft, G.R., and Strangway, D.W., 1974, Magnetic relaxation and the electromagnetic response parameter: Geophysics, v. 39, p. 302-311.
11. Olhoeft, G.R., and Strangway, D.W., 1974, Electrical properties of the surface layers of Mars: Geophysical Research Letters, v. 1, p. 141-143.
12. Frisillo, A.L., Winkler, J., Olhoeft, G.R., and Strangway, D.W., 1974, Molecular gas flow and dielectric properties of lunar soil, in Lunar Science V: Lunar Science Institute, Houston, p. 248-250.
13. Olhoeft, G.R., 1975, The electrical properties of permafrost: Toronto, Canada, University of Toronto, Dept. of Physics, Ph. D. thesis, 172p.
14. Olhoeft, G.R., and Strangway, D.W., 1975, Electrical properties of the first 100 meters of the moon: Earth and Planetary Science Letters, v. 24, p. 394-404.
15. Olhoeft, G.R., Strangway, D.W., and Annan, A.P., 1975, Electrical properties and water in lunar soil, in Lunar Science VI: Lunar Science Institute, Houston, p. 625-627.
16. Olhoeft, G.R., Strangway, D.W., and Pearce, G.W., 1975, Effects of water on electrical properties of lunar fines, in Lunar Science Conference, 6th, Proceedings: Geochimica Cosmochimica Acta, sup. 6, p. 3333-3342.
17. Frisillo, A.L., Olhoeft, G.R., and Strangway, D.W., 1975, Effects of vertical stress, temperature, and density on the dielectric properties of lunar samples 72441.12, 15301.38, and a terrestrial basalt: Earth and Planetary Science Letters, v. 24, p. 345-356.
18. Strangway, D.W., Pearce, G.W., and Olhoeft, G.R., 1975, Magnitnia i dielektricheskia svoistva lunnich brazshov, (in Russian), in Cosmochim Lun i Planet: Nauka Publishing House, Moscow, p. 712-728.
19. Olhoeft, G.R., 1976, Electrical properties of rocks, in the Physics and Chemistry of Rocks and Minerals, Strens, R. J. G., ed.: Wiley, London, p. 261-278 (proceedings of a NATO Short Course).
20. Olhoeft, G.R., 1976, Effects of water on the electrical properties of planetary regoliths, in Colloquium on Water in Planetary Regoliths Proceedings: Hanover, NH, Dartmouth College, p. 139-142.
21. Young, E.J., and Olhoeft, G.R., 1976, Relations between specific gravity and chemical composition for a suite of igneous and metamorphic rocks: U.S. Geological Survey Open File Report 76-809, 14 p., 2 pls.
22. Olhoeft, G.R., 1977, Electrical properties of natural clay permafrost: Canadian Journal of Earth Science, v. 14, p. 16-24.
23. Olhoeft, G.R., 1977, Nonlinear complex resistivity for the characterization of sedimentary uranium deposits in Uranium-Thorium Research and Resource Conference: U.S. Geological Survey Circular 753, p. 12-13.
24. Olhoeft, G.R., 1977, Electrical properties of water saturated basalt: Preliminary results to 506K (233oC): U.S. Geological Survey Open File Report 77-688, 8 p.
25. Campbell, D.L., and Olhoeft, G.R., 1977, Laboratory measurements of complex resistivity characteristics of oil shales from Saterdol no. 1 corehole, Piceance Creek Basin, Colorado: U.S. Geological Survey Open File Report 77-410, 13 p.
26. Strangway, D.W., and Olhoeft, G.R., 1977, Electrical properties of planetary surfaces, in The Moon: A New Appraisal from Space Missions and Laboratory Analyses, London: The Royal Society; Phil. Transactions Royal Society of London A, v. 285, p. 441-450.
27. Strangway, D.W., Pearce, G.W., and Olhoeft, G.R., 1977, Magnetic and dielectric properties of lunar samples, in The Soviet-American Conference on the Cosmochemistry of the Moon and Planets: National Aeronautic and Space Administration SP-370 p. 417-432.
28. Wong, J., Rossiter, J.R., Olhoeft, G.R., and Strangway, D.W., 1977, Permafrost: electrical properties of the active layer measured in situ: Canadian Journal of Earth Science, v. 14, p. 582-586.
29. Olhoeft, G.R., 1978, The electrical properties of permafrost, in International Conference on Permafrost, 3d, Proceedings: Edmonton, Canada, Ottawa: National Research Council, July, 1978, v. 1, p. 127-131.
30. Olhoeft, G.R., 1978, Algorithm and BASIC program for ordinary least squares regression in two and three dimensions: U.S. Geological Survey Open File Report 78-876, 8 p.
31. Olhoeft, G.R., 1978, Electrical properties of salt cored from Carlsbad, New Mexico: U.S. Geological Survey Open File Report 78-463, 4 p.
32. Olhoeft, G.R., 1978, Nonlinear complex resistivity as a technique to study the state and chemistry of groundwater, in Second Colloquium on Planetary Water and Polar Processes, Hanover New Hampshire, October 16-18: USACRREL, p. 9-11.
33. Olhoeft, G.R., Elliot, C., Fuller, B.D., Keller, B.D., Scott, W.J., and Strangway, D.W., 1978, Proposed Standards for the Presentation of Electrical and Electromagnetic Data, Report of the Subcommittee on Electrical Standards, Tulsa: Society of Exploration Geophysicists, 13 p.
34. Rossiter, J.R., Strangway, D.W., Koziar, A., Wong, J., and Olhoeft, G.R., 1978, Electromagnetic sounding of permafrost in International Conference on Permafrost, 3d, Proceedings: Edmonton Canada, Ottawa, National Research Council, July, 1978, v. 1, p. 567-572.
35. Olhoeft, G.R., 1979, Nonlinear electrical properties, in Neel, L., ed., in Nonlinear Behavior of Molecules, Atoms and Ions in Electric, Magnetic or Electromagnetic fields: Amsterdam, Elsevier Publishing Co., p. 395-410.
36. Olhoeft, G.R., 1979, Electrical properties, in Initial Report of the Petrophysics Laboratory: U.S. Geological Survey Circular 789 p. 1-25.
37. Olhoeft, G.R., 1979, Impulse radar studies of near surface geological structure, in Lunar an Planetary Science X: Lunar and Planetary Institute, Houston, p. 943-945.
38. Olhoeft, G.R., 1979, Tables of room temperature electrical properties for selected rocks and minerals with dielectric permittivity statistics: U.S. Geological Survey Open File Report 79-993, 24 p., 3 fig., 2 tables.
39. Olhoeft, G.R., 1979, Electrical conductivity from 200o to 1000oC for 264 rocks and minerals (after data in Bondarenko and Parkhomenko, 1972): U.S. Geological Survey Open File Report 79-846, 284 p.
40. Olhoeft, G.R., 1979, Schaefer, B., and Johnson, G.R., 1979, Experimental measurements of surface and volume scattering processes at microwave wavelengths, in Lunar and Planetary Science X: Lunar and Planetary Institute, Houston, p. 946-948.
41. Olhoeft, G.R., Watts, R.D., Frischknecht, F.C., Bradley, J.A., and Dansereau, D.A., 1979, Electromagnetic geophysical exploration in the National Petroleum Reserve in Alaska, in Symposium on Permafrost Field Methods and Permafrost Geophysics, Associated Commission on Technical Research: Natural Resource Council Technical Memo. 124, Ottawa p. 184-190.
42. Ucok, H., Olhoeft, G.R., and Ershaghi, I., 1979, Electrical resistivity of geothermal brines, SPE 7878, in Symposium on Oilfield and Geothermal Brines, Dallas: Society of Petroleum Engineers p. 163-171
43. Olhoeft, G.R., 1980, Thawing of permafrost along the Trans-Alaska pipeline, in Symposium on Permafrost Geophysics (no. 5), Proceedings: Ottawa, Canada, Nuclear Regulatory Commission Technical Memo. no. 128, p. 103-109.
44. Olhoeft, G.R., and Scott, J.H., 1980, Nonlinear complex resistivity logging, in Annual Logging Symposium Transactions, 21st: Society of Professional Well Log Analysts, p. T1-T18.
45. Ucok, H., Ershaghi, I., and Olhoeft, G.R., 1980, Electrical resistivity of geothermal brines: Journal of Petroleum Technology, v. 32, p. 717-727.
46. Olhoeft, G.R., 1980, Initial report of the Petrophysics Laboratory: 1977-1979 Addendum: U.S. Geological Survey Open-File Report 80-522, 9 p., 4 fig.
47. Olhoeft, G.R., 1980, Nonlinear complex resistivity 2, in Smith, J., ed., SUNY: Colloquium on Planetary Water, 3d, Proceedings, Buffalo, NY, p. 136-138.
48. *Olhoeft, G.R., 1981, Parametric considerations, in Physical Properties of Rocks and Minerals, in Touloukian, Y. S., Judd W. R., and Roy, R. F., eds: New York, McGraw-Hill, p. 21-28. (invited paper).
49. *Olhoeft, G.R., 1981, Electrical properties of rocks, in Physical Properties of Rocks and Minerals, in Touloukian, Y. S., Judd, W. R., and Roy, R. F., eds.: New York, McGraw-Hill, p. 257-330. (invited paper).
50. *Olhoeft, G.R., 1981, Electrical properties of rocks and minerals, in Advances in Induced Polarization and Complex Resistivity, Tucson: The University of Arizona, pp. 39-102 (invited paper comprising 3 1-hour lectures).
51. Olhoeft, G.R., 1981, Electrical properties of granite with implications for the lower crust: Journal of Geophysical Research, v. 86, p. 931-936.
52. Olhoeft, G.R., Reynolds, R.L., Friedman, J.D., Johnson, G.R., and Hunt, G. R., 1981, Physical properties of the June 1980 dacite dome, in The 1980 Eruptions of Mt. St. Helens, Washington, in Lipman P. W., and Mullineaux, D. R., eds: U.S. Geological Survey Professional Paper 1250, p. 549-556.
53. Daniels, J.J., Scott, J.H., and Olhoeft, G.R., 1981, Geophysical well logs for drill hole UPH-3, northern Illinois: U.S. Geological Survey Open File Report 81-237, 6 p., 3 pl.
54. Daniels, J.J., Scott, J.H., and Olhoeft, G.R., 1981, Interpreting Precambrian metamorphic geology from geophysical well logs, in Society of Professional Well Log Analysts Logging Symposium, 22nd, Transactions: Houston, Society of Professional Well Log Analysts p. T1-T17.
55. Friedman, J.D., Olhoeft, G.R., Johnson, G.R., and Frank, David, 1981, Heat content and thermal energy equivalent of the June 1980 dacite dome, in The 1980 Eruptions of Mt. St. Helens, Washington, in Lipman, P. W., and Mullineaux, D. R., eds.: U.S. Geological Survey Professional Paper 1250, p. 557-568.
56. Manghnani, M.H., Rai, C.S., Katahara, K.W., and Olhoeft, G.R., 1981, Ultrasonic velocity and attenuation in basalt melt: in Anelasticity in the Earth: American Geophysical Union, Geodynamics Series, v. 4, p. 118-122.
57.* Olhoeft, G.R., 1982, Warburg impedances at single water-mineral interfaces: Society of Exploration Geophysicists International Meeting and Exposition, Dallas, October 17-21, 1982, 52nd Annual Technical Program Abstracts and Bibliographies, p. 516-518 (invited paper).
58.* Olhoeft, G.R., 1983, Electrical properties of rocks and minerals, Short course notes: Australian Society of Exploration Geophysicists, Brisbane, 210 p. (invited)
59. Daniels, J.J., Olhoeft, G.R., and Scott, J.H., 1983, Interpretation of core and well log physical property data from drill hole UPH-3, Stephenson County, Illinois: Journal of Geophysical Research, v. 88, p. 7346-7354.
60. Olhoeft, G.R., 1984, Applications and limitations of ground penetrating radar, [Expanded abstracts]: Society of Exploration Geophysicists, 54th Annual International Meeting and Exposition, Atlanta, GA, p. 147-148.
61. Olhoeft, G.R., 1984, Clay-organic reactions measured with complex resistivity [Expanded abstracts]: Society of Exploration Geophysicists, 54th Annual International Meeting and Exposition, Atlanta, GA, p. 356-358.
62.* Olhoeft, G.R., 1984, Electrical properties of clays and zeolites, invited 1-hour lecture: Clay Mineral Society workshop on Clays and Log Analysis, Baton Rouge, Louisiana, September 29, workshop notes, 90 p.
63.* Johnson, G.R., and Olhoeft, G.R., 1984, Density of rocks and minerals, in Carmichael, I.S., ed., CRC Handbook of Physical Properties of Rocks and Minerals: CRC Press, p. 1-38 (invited paper).
64. Wright, D.L., Olhoeft, G.R., and Watts, R.D., 1984, Ground-penetrating radar studies on Cape Cod, in Conference on Surface and Borehole Geophysical Methods in Ground Water Investigations, Proceedings: U.S. Environmental Protection Agency and National Water Well Association, San Antonio, TX, Feb. 7-9, p. 666-680.
65.* Olhoeft, G.R., 1985, Low frequency electrical properties: Geophysics, v. 50, p. 2492-2503. (invited: Golden Anniversary Issue)
66. Sheets, P.D., Loker, W.M., Spetzler, H.A.W., Ware, R.H., and Olhoeft, G.R., 1985, Geophysical exploration for ancient Maya housing at Ceren, El Salvador: National Geographic Research Reports v. 20, p. 645-656.
67. Towle, J.N., Anderson, R.G., Pelton, W.H., Olhoeft, G.R., and LeBrecque, D., 1985, Direct detection of hydrocarbon contaminants using the induced-polarization method: Society of Exploration Geophysicists Expanded Abstracts, 55th American International Meeting and Exposition, Washington, D.C., p. 145-147.
68. Schaber, G.G., McCauley, J.F., Breed, C.S., and Olhoeft, G.R., 1986, Shuttle imaging radar: physical controls on signal penetration and subsurface scattering in the eastern Sahara: Institute of Electrical and Electronic Engineers Trans. Geoscience and Remote Sensing, v. GE-24, p. 603-623.
69.* Olhoeft, G.R., 1986, Electrical conductivity: in Eighth workshop on electromagnetic induction in the earth and the moon, review papers, IAGA Working Group 1-3, August, 1986, Neuchatel, Switzerland, p. 2-1 to 2-13. (invited)
70.* Olhoeft, G.R., 1987, Electrical properties from 10-3 to 10+9 Hz -- physics and chemistry, in Physics and Chemistry of Porous Media II, American Institute of Physics Conf. Proc. 154, Ridgefield, CT, 1986, J.R. Banavar, J. Koplik, and K.W. Winkler, eds., NY, AIP, p. 281-298. (invited). Adobe PDF Download 1,944,351 bytes
71. Olhoeft, G.R., 1986, Direct detection of hydrocarbon and organic chemicals with ground penetrating radar and complex resistivity, in Proc. of the NWWA/API Conference on Petroleum Hydrocarbons and organic chemicals in ground water -- prevention, detection and restoration, Nov., 12-14, 1986, Houston: Dublin, OH, NWWA, p. 284-305.
Adobe PDF Download 4,977,336 bytes
72. Walther, E.G., Pitchford, A.M., and Olhoeft, G.R., 1986, A strategy for detecting subsurface organic contaminants, in Proc. of the NWWA/API Conference on Petroleum hydrocarbons and organic contaminants in ground water -- prevention, detection and restoration, Nov. 12-14, 1986, Houston: Dublin, OH, NWWA, p. 357-381.
73. Trudeau, D.A., Hanor, J., Olhoeft, G.R., Ranganathan, V., McManus, K.M., Capron, D.E., and Lucius, J.E., 1986, Hydrogeology, occurrence and movement of oil-field brine and organic priority pollutant contamination at a waste site in Calcasieu Parrish, Louisiana: USGS Water Supply Paper (in press in WRD).
74. Hall, S.H., and Olhoeft, G.R., 1986, Nonlinear complex resistivity of some nickel sulfides from Western Australia, Geophys. Prosp., v. 34, p. 1255-1276.
75. Olhoeft, G.R., 1986, Detection of hazardous wastes by using geophysical techniques, in United States Geological Survey Yearbook, Fiscal Year 1985, Wash. D.C., U.S. Government Printing Office, p. 94-95.
76. Olhoeft, G.R., Callahan, G.D., Carrier III, W.D., Langmuir, D., Olsen, H.W., Rajaram, V., and Rhoderick, J.E., 1987, Annual review of U.S. Progress in rock mechanics: coupled processes, Wash. D.C., Nat. Academy Press, 36 p.
77. Olhoeft, G.R., 1990, Surface geophysical methods applicable to characterization of a low-level radioactive-waste sites - in Bedinger, M.S., and Stevens, eds., Safe Disposal of Radionuclides in Low-Level Radioactive-Waste Repository Sites, Proceedings, Low-Level Radioactive-Waste Disposal Workshop, U.S. Geological Survey, July 11-16, 1987, Big Bear Lake, California: U.S. Geological Survey Circular 1036, p. 119-121.
78. Olhoeft, G.R., and Johnson, G.R., 1987, Physical properties of Project Gas Buggy Core, to be a U.S. Army Waterways Experiment Station Report (through Army Review 5/87, now in Air Force review).
79. *Bacon, C.R., Anderson, R.N., Costain, J.K., Dallmeyer, R.D., Ferry, J.M., Olhoeft, G.R., Park, A., Rowley, J.C., Taylor, Jr., H.P., and Tullis, J.A., 1987, The scientific value of coring the proposed Southern Appalachian research drill hole: Comm. Cont. Sci. Drilling/NRC, National Academy Press, 45 p. (invited)
80. *Olhoeft, G.R., 1988, Selected bibliography on ground penetrating radar, in Proceedings of the Symposium on the Applications of Geophysics to Engineering and Environmental Problems, March 28-31, 1988, Golden, CO,
EEGS, p. 462-520. (invited) Adobe PDF Download 200,540 bytes
81. *Olhoeft, G.R., 1988, Interpretation of hole-to-hole radar measurements, in Proceedings of the Third Technical Symposium on Tunnel Detection, January 12-15, 1988, Golden, CO, p. 616-629. (invited)
82. Olhoeft, G.R., 1988, Geophysics advisor expert system: U.S. Geological Survey Open-File Report 88-399A/B 1 p. + floppy disc.
83. Lucius, J.E., Olhoeft, G.R., Hill, P.L., and Duke, S.K., 1989, Properties and hazards of 108 selected substances: U.S. Geological Survey Open-File Report 89-491, 538 p.
84. King, T.V.V., and Olhoeft, G.R., 1989, Mapping organic contamination by detection of clay-organic processes, in Proc. Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Detection and Restoration Conference, Nov. 15-17, 1989, Houston, AGWSE/NWWA/API, Dublin, OH, NWWA, p. 627-640.
85. Butler, D.K., Llopis, J.L., Dobecki, T.L., Wilt, M.J., Corwin, R.F., and Olhoeft, G.R., 1990, Comprehensive geophysics investigation of an existing dam foundation - engineering geophysics research and development:
The Leading Edge, v. 9, no. 9, p. 44-53.
86. Ethington, E.F., Olhoeft, G.R., and King, T.V.V., 1990, Oxygen depletion studies in the Electric Power Research Institute, Compressed Air Energy Storage Facility, Pittsfield, Illinois:
U.S. Geological Survey Open-File Report 90-36, 98 p.
87. Lucius, J.E., Olhoeft, G.R., and Duke, S.K., eds., 1990, Third International Conference on Ground Penetrating Radar, abstracts of the technical meeting, Lakewood, Colorado, USA, May 14-18, 1990:
U.S. Geological Survey Open-File Report 90-414, 94 p.
88. Lucius, J.E., Olhoeft, G.R., Hill, P.L., and Duke, S.K., 1990, Properties of 108 selected substances -- 1990 edition:
U.S. Geological Survey Open-File Report 90-408, 559 p.
89. Olhoeft, G.R., 1990, Monitoring geochemical processes with geophysics, Proceedings of a U.S. Geological Survey Workshop on Environmental Geochemistry, Doe, B.R., ed.:
U.S. Geological Survey Circular 1033, p. 57-60.
90. Olhoeft, G.R., 1991, Quantitative statistical description of subsurface heterogeneities with ground penetrating radar at Bemidji, Minnesota: in U.S. Geological Survey Toxic Substance Hydrology Program, Proceedings of the technical meeting, Monterey, California, March 11-15, 1991,
USGS WRI 91-4034, p. 650-653.
91. Olhoeft, G.R., 1990, Addressing Super VGA modes from protected mode C: The C Users Journal, v. 8, no. 10, p. 99-105.
92. Olhoeft, G.R., 1990, 386 protected mode access to 24-bit color graphics: TECH Specialist, v. 1, no. 5, p. 31-36.
93. *Olhoeft, G. R., 1991, Magnetic and electrical properties of martian particles: in Sand and Dust on Mars, R. Greeley and R. M. Haberle, eds., NASA Conf. Publ. 10074, p. 44-46. (invited)
94. Olhoeft, G.R., and King, T.V.V., 1991, Mapping subsurface organic compounds noninvasively by their reactions with clays: in U.S. Geological Survey Toxic Substance Hydrology Program, Proceedings of the technical meeting, Monterey, California, March 11-15, 1991,
USGS WRI 91-4034, p. 552-557.
95. Plumlee, G.S., Ethington, E.F., King, T.V.V., Olhoeft, G.R., and Ridley, W.I., 1990, Geochemical and geophysical studies of the reactions of some common minerals with air - implications for oxygen loss in compressed air energy storage reservoirs: EPRI Project RP-8000-17 Final Report, U.S. Geological Survey, 157 p.
96. *U. S. DOE (98 authors including Olhoeft), 1990, Basic research for environmental restoration, U.S. Department of Energy Report DOE/ER-0482T, 156 p.
97. Olhoeft, G.R., 1991, 1024x768x256 Images from 386 Protected Mode on SVGA, 8514/A and 34010 Cards: TECH Specialist, v. 2, no. 3, p. 37-44.
98. *Olhoeft, G.R., 1991, Spatial Variability, in Proc. NSF/EPRI Workshop on Dynamic Soil Properties and Site Characterization, v. 1, Palo Alto, Electric Power Research Institute Report NP-7337, p. 5-1 to 5-20
99. *Carrier III, W. D., Olhoeft, G. R., and Mendell, W., 1991, Physical properties of the lunar surface: in Lunar Sourcebook, Heiken, G., Vaniman, D., and French, B.M., eds.: Cambridge Univ. Press, p. 475-594.
100. *Vaniman, D., Reedy, R., Heiken, G., Olhoeft, G.R., and Mendell, W., 1991, The lunar environment, in Lunar Sourcebook, Heiken, G., Vaniman, D., and French, B.M., eds.: Cambridge Univ. Press,p. 27-60.
101. *Schenk, C.J., Gautier, D.L., Olhoeft, G.R., and Lucius, J.E., 1993, Internal structure of an eolian dune using ground penetrating radar, in Lancaster, N., and Rye, K., eds., Ancient and Modern Eolian Sediments: Spec. Publ. Int. Ass. Sediment, v. 16, p. 61-69 p. (invited)
102. Greenhouse, J.P., Brewster, M.L., Schneider, G.W., Redman, D.J., Annan, A.P., Olhoeft, G.R., Lucius, J.E., Sander, K.A., and Mazzella, A.T., 1993, Geophysics and solvents: the Borden experiment:
The Leading Edge, April, v. 12, no. 4, p. 261-267.
103. Lucius, J.E., Olhoeft, G.R., Hill, P.L., and Duke, S.K., 1992, Properties and hazards of 108 selected substances - 1992 edition: U.S. Geological Survey Open-File Report 92-527, 554 p.
104.*Olhoeft, G.R., 1992, Site characterization tools: in Subsurface restoration conference, Third Int'l. Conf. on Ground Water Quality Research, June 21-24, 1992, Dallas, TX: Rice University, National Center for Ground Water Research, p. 29-31. [invited]
105.* Olhoeft, G.R., 1992, Geophysical detection of hydrocarbon and organic chemical contamination: in Bell, R.S., ed, Proceedings on Application of Geophysics to Engineering, and Environmental Problems, Oakbrook, IL:
EEGS, p. 587-595.[invited] Adobe PDF Download 320,094 bytes
106. Olhoeft, G.R., 1992, Geophysics advisor expert system version 2.0:
U.S. Geological Survey Open-File Report 92-526, 21p. + floppy disk.
(also published as EPA/600/R-92/200)
EXPERT.LZH Download 150,858 bytes
107. Powers, M.H., Duke, S.K., Huffman III, A.C., and Olhoeft, G.R., 1992, GPRMODEL: one-dimensional full waveform forward modeling of ground penetrating radar data: U.S. Geological Survey Open-File Report 92-532, 22p.
108. Sander, K.A., Olhoeft, G.R., and Lucius, J.E., 1992, Surface and borehole radar monitoring of a DNAPL spill in 3D versus frequency, look angle and time, in Bell, R.S., ed, Proc. of the Symposium on the Application of Geophysics to Engineering and Environmental Problems, Oakbrook, IL:
EEGS, p. 455-469. Adobe PDF Download 2,980,617 Bytes
109.* U.S. EPA (17 authors including Olhoeft), 1992, Dense Nonaqueous Phase Liquid -- a workshop summary, April 16-19, 1991, Dallas Texas: U.S. Environmental Protection Agency report EPA/600/R-92/030, 81p. [invited]
110. Annan, A.P., Brewster, M.L., Greenhouse, J.P., Redman, J.D., Schneider, G.W., Olhoeft, G.R., and Sanders, K.A., 1992, Geophysical monitoring of DNAPL migration in a sandy aquifer:
Society of Exploration Geophysicists Technical Program, 62nd Annual International Meeting and Exposition, 25-29 October 1992, New Orleans, p. 344-347.
111. Lucius, J.E., and Olhoeft, G.R., 1993, Statistical analysis of field-scale subsurface heterogeneity at the Princeton, Minn., Management Systems Evaluation Area using ground penetrating radar, in Agricultural research to protect water quality conference proceedings, Feb. 21-24, 1993, Minneapolis, MN: Soil and Water Conservation Society, Ankeny, IA, p. 355-358.
112. *Olhoeft, G.R., 1992, Data fusion (integration), ch. 3; Ground penetrating radar (GPR), ch. 5, in Workshop on noninvasive geophysical site characterization, Van Eeckhout, E., and Calef, C., compilers: Los Alamos LA-12311-C, UC-903, p. 4-6 and p. 11-14.
113. Lucius, J.E., and Olhoeft, G.R., 1996, Geophysical investigations of heterogeneity and scale at Princeton, Minnesota, Management Systems Evaluation Area: in U. S. Geological Survey Toxic Substances Hydrology Program Review, Proc. of the technical meeting, Colorado Springs, CO, Sept 20-23, 1993, D. W. Morganwalp and D. A. Aronson, eds. ,
USGS WRI Report 94-4015, p. 581-589.
114. Olhoeft, G.R., 1993, Velocity, attenuation, dispersion and diffraction hole-to-hole radar processing, in Proceedings of the Fourth Tunnel Detection Symposium on Subsurface Exploration Technology, Colorado School of Mines, Golden, CO, 26-29 April 1993, Miller, R., ed.: U.S. Army Belvoir Research, Development and Engineering Center, p. 309-322.
Adobe PDF Download 13,524,276 bytes (over an hour download at 56k)
115. Olhoeft, G.R., and Capron , D.E., 1993, Laboratory measurements of the radiofrequency electrical and magnetic properties of soils from near Yuma, Arizona: U.S. Geological Survey Open-File Report 93-701, 214 p.
116. Wright, D.L., Olhoeft, G.R., and Grover, T.P., 1996, Velocity, attenuation and dispersion electromagnetic tomography in fractured rock: in U. S. Geological Survey Toxic Substances Hydrology Program Review, Proc. of the technical meeting, Colorado Springs, CO, Sept 20-23, 1993, D. W. Morganwalp and D. A. Aronson, eds.,
USGS WRI Report 94-4015, p. 111-118.
117. Wright, D.L., Olhoeft, G.R., Grover, T.P., and Bradley, J.A., 1993, High-speed digital radar systems and applications to subsurface exploration, in Proceedings of the Fourth Tunnel Detection Symposium on Subsurface Exploration Technology, Colorado School of Mines, Golden, CO, 26-29 April 1993, Miller, R., ed.: U.S. Army Belvoir Research, Development and Engineering Center, p. 275-288.
118. Wright, D.L., Olhoeft, G.R., Hsieh, P.A., Majer, E.L., Paillet, F.L., and Lane, J.W., Jr., 1996, Electromagnetic and seismic tomography compared to borehole acoustic televiewer and flowmeter logs for subsurface fracture in mapping at the Mirror Lake Site, New Hampshire: U. S. Geological Survey Toxic Substances Hydrology Program Review, Proc. of the technical meeting, Colorado Springs, CO, Sept 20-23, 1993, D. W. Morganwalp and D. A. Aronson, eds.,
USGS WRI Report 94-4015, p. 119-126.
119. Olhoeft, G. R., 1994, Geophysical observations of geological, hydrological and geochemical heterogeneity: in Symp. on the Application of Geophysics to Engineering and Environmental Problems, R. S. Bell and C. M. Leper, eds., Mar 27-31, 1994, Boston,
EEGS, Littleton, CO, p. 129-141. Adobe PDF Download 3,068,178 bytes
120. Olhoeft, G. R., 1994, Modeling out-of-plane scattering effects: in Proc. of the Fifth Int'l. Conf. on Ground Penetrating Radar, Kitchener, Ontario, 12-16 June 1994, p. 133-144. Adobe PDF Download 6,222,141 Bytes
121. Olhoeft, G. R. and Capron, D. E., 1994, Petrophysical causes of electromagnetic dispersion: in Proc. of the Fifth Int'l. Conf. on Ground Penetrating Radar, Kitchener, Ontario, 12-16 June 1994, p. 145-152.
122. Powers, M. H. and Olhoeft, G. R., 1994, Modeling dispersive ground penetrating radar data: in Proc. of the Fifth Int'l. Conf. on Ground Penetrating Radar, Kitchener, Ontario, 12-16 June 1994, p. 173-183.
123. Olhoeft, G. R., Lucius, J. E., and Phillips, S. J., 1994, Geophysical tracking of the injection of trench stabilization material at U. S. DOE Hanford Site, Richland, Washington:
USGS Open File Report 94-146, 77p.
124. Olhoeft, G. R., Powers, M. H. and Capron, D. E., 1994, Buried object detection with ground penetrating radar: in Proc. of Unexploded Ordnance (UXO) detection and range remediation conference, Golden, CO, May 17-19, 1994, p. 207-233.
Adobe PDF Download 3,496,170 bytes
125. Sander, K. A. and Olhoeft, G. R., 1994, 500-MHz ground penetrating radar data collected during an intentional spill of tetrachloroethylene at Canadian Forces Base Borden in 1991: U.S. Geological Survey Digital Data Series DDS-25, CD-ROM.
126. Powers, M. H. and Olhoeft, G. R., 1995, GPRMODV2: one-dimensional full waveform forward modeling of dispersive ground penetrating radar data, version 2.0:
U.S. Geological Survey Open File Report 95-58, 41p. + floppy diskette.
127. *Olhoeft, G. R., 1995, Noninvasive Complex Resistivity Measurements of Clay-Organic Processes to Map Organic Contamination and Degradation of Clay Barriers: in Proc. Environmental site characterization and monitoring basic research program 1995 contractor/grantee meeting, 11-12 May 1995, Hanscom AFB, MA, p. 33-37.
128. Brewster, M. L., Annan, A. P., Greenhouse, J. P., Kueper, B. H., Olhoeft, G. R., Redman, J. D. and Sander, K. A., 1995, Observed migration of a controlled DNAPL release by geophysical methods: Ground Water, v. 33, p. 977-987.
129. *Olhoeft, G. R., 1996, Environmental Geophysics: in McGraw-Hill Yearbook of Science and Technology 1997, S. P. Parker, ed., McGraw-Hill, NY, p.175-177.
130. Powers, M. H. and Olhoeft, G. R., 1996, Modeling the GPR response of leaking, buried pipes: in Proc. of SAGEEP ‘96, R. S. Bell and M. H. Cramer, eds., Keystone, Colorado,
EEGS, Wheat Ridge, CO, p. 525-534.
131. Powers, M. H. and Olhoeft, G. R., 1996, Computer Modeling to Transfer GPR UXO Detectability Knowledge Between Sites: in Proc. UXO Forum 1996 Conference Proceedings, Williamsburg, VA, March 26-29, 1996, Dept of Defense Explosives Safety Board, Alexandria, VA, p. 347-356.
Adobe PDF Download 799,222 bytes
132. *Olhoeft, G. R., 1996, Application of Ground Penetrating Radar: in Proceedings of the 6th Int'l. Conf. on Ground Penetrating Radar, GPR'96, Sept 30- Oct 3, 1996, Sendai, Japan, p. 1-4 (invited keynote address). Adobe PDF Download 14,548 bytes
133. * Olhoeft, G. R. and Jones, D. P., 1997, Noninvasive Complex Resistivity Measurements of Clay-Organic Processes to Map Organic Contamination and Degradation of Clay Barriers: in Selected research in environmental quality, 14-17 Jan 1997, Panama City, FL, AFOSR, Bolling AFB DC, p. 211-216.
134. Olhoeft, G. R., 1998, Ground penetrating radar on Mars: in Proc. of
GPR'98, 7th Int’l. Conf. On Ground Penetrating Radar, May 27-30, 1998, The Univ. of Kansas, Lawrence, KS, USA, p. 387-392. Adobe PDF Download 85,037 bytes
135. Olhoeft, G. R., 1998, Electrical, magnetic and geometric properties that determine ground penetrating radar performance: in Proc. of GPR'98, 7th Int’l. Conf. On Ground Penetrating Radar, May 27-30, 1998, The Univ. of Kansas, Lawrence, KS, USA,p.177-182. Adobe PDF Download 57,913 bytes
136. Olhoeft, G. R., 1998, GRORADAR(tm): Acquisition, processing, modeling, and display of ground penetrating radar data: ver. 4.0, software distributed on CD-ROM at GPR’98, 7th Int’l. Conf. On Ground Penetrating Radar, May 27-30, 1998, The Univ. of Kansas, Lawrence, KS, USA.
137. Olhoeft, G. R., 1998, Noninvasive Complex Resistivity Measurements of Clay-Organic Processes to Map Organic Contamination and Degradation of Clay Barriers: in Proceedings 1998 Conference on Hazardous Waste Research, AFOSR Review Session, May 18-21, 1998, Snowbird, UT, 6p.
Adobe PDF Download 196,832 bytes
138. Olhoeft, G. R. and Wardwell, D., 1998, Complex resistivity demonstration at Hill Air Force Base: Task 1X final report MRCEG-96119.01-FR-R0, MRC Corp. to USAF Armstrong Laboratory, Tyndall AFB, FL, AFRL-ML-TR-1998-4506, Contract F08637-95-D-6001, 95p.
139. Morey, R. M., Armaghnai, J.M., Bernstein, R., Bertrand, C., Clemena, G.G., Jayaprakash, G.P., Kopac, P.A., Olhoeft, G.R., Rix, G. J., Robson, G., and Springer, J., 1998, Ground Penetrating Radar for Evaluating Subsurface Conditions for Transportation Facilities:
National Cooperative Highway Research Program Synthesis of Highway Practice 255
, NRC Transportation Research Board, Washington DC, 37p.
140. Olhoeft, G. R., 1999, Ground penetrating radar: use and misuse:
SPIE Subsurface Sensors and Applications Conference 3752 Proceedings, C. Nguyen, ed., 19-21 July 1999, Denver, CO, p. 166-173.
141. * Olhoeft, G.R., 1999, Applications and frustrations in using ground penetrating radar: Ultra Wideband Conference, September 27-29, 1999, Washington, DC, Proceedings CD-ROM or
http://www.uwb.org/Conference/proceedings, 13p. (invited) Adobe PDF Download 4,063,143 bytes
142. * Olhoeft, G. R., 2000, Maximizing the information return from ground penetrating radar:  J. Appl. Geophys., v. 43/2-4, p. 175-187. (invited)
143. Sneddon, K.W., Olhoeft, G. R., and Powers, M. H., 2000,
Determining and mapping DNAPL saturation values from noninvasive GPR measurements: in Proc. of SAGEEP 2000, 21-25 February, 2000, Arlington, VA, M.H. Powers, A-B. Ibrahim, and L. Cramer, eds., EEGS, Wheat Ridge, CO, p. 293-302. Adobe PDF Download 307,048 bytes (corrected)
144. Olhoeft, G. R. and Smith III, S.S., 2000, Automatic processing and modeling of GPR data for pavement thickness and properties: in GPR 2000, Proc. of the 8th International Conference on Ground Penetrating Radar, Gold Coast, Australia, 22-25 May 2000, D. A. Noon, G. F. Stickley, and D. Longstaff, eds., SPIE vol. 4084, p. 188-193. Adobe PDF Download 1,126,434 bytes
145. Le Rousseau, J. H., de Hoop, M. V. and Olhoeft, G. R., 2000, Directional decomposition and generalized-screen approximation for the scattering of electromagnetic waves in isotropic, frequency dependent media:  in GPR 2000, Proc. of the 8th International Conference on Ground Penetrating Radar, Gold Coast, Australia, 22-25 May 2000, D. A. Noon, G. F. Stickley, and D. Longstaff, eds., SPIE vol. 4084, p. 848-855. Adobe PDF Download 1,141,992 bytes
146. Olhoeft, G. R., Sinex, D. B., Sander, K. A., Lagmanson, M. M., Stillman, D. E., Lewis, S., Clark, B. T., Wallin, E. L. and Kauahikaua, J. P., 2000, Hot and cold lava tube characterization with ground penetrating radar:  in GPR 2000, Proc. of the 8th International Conference on Ground Penetrating Radar, Gold Coast, Australia, 22-25 May 2000, D. A. Noon, G. F. Stickley, and D. Longstaff, eds., SPIE vol. 4084, p. 482-487. Adobe PDF Download 3,807,528 bytes
147. Roth, F. and Olhoeft, G. R., 2000, GPR antenna position and orientation estimation using strapdown intertial navigation:  in GPR 2000, Proc. of the 8th International Conference on Ground Penetrating Radar, Gold Coast, Australia, 22-25 May 2000, D. A. Noon, G. F. Stickley, and D. Longstaff, eds., SPIE vol. 4084, p. 596-601.
148. Olhoeft, G. R., 2000, Advanced processing and modeling of ground penetrating radar data: GPR 2000, 8th International Conference on Ground Penetrating Radar,  Gold Coast, Australia, 22-25 May 2000, Workshop notes CD-ROM.
149. Romig, P. R., Baltuck, M., Butler, D.K., Danbom, S.H., Ghiorse, W. C., Herman, J.S., Knight, R., Meltzer, A.S., Mercer, J.W., Mitchell, J.K., Morgan, F.D., Olhoeft, G.R., Pruess, K., Spies, B.R., Steeples, D.W., Sternberg, B.K., and Watson, K., 2000, Seeing into the Earth: Noninvasive Characterization of the Shallow Subsurface for Environmental and Engineering Applications: NRC Committee Report, NAS Press, Washington DC, 148p. Download Link
150. Beaty, D.W., Clifford, S., Gogineni, P., Grimm, R., Leuschen, C., Olhoeft, G. R., Raney, K., Safaeinili, A., 2001, Report of the virtual instrument Science Definition Team on a Facility Orbital Radar Sounder Experiment for Mars Reconaissance Oribter 2005 (FORSE), from JPL to NASA Headquarters, April 9, 2001, 35p.
151. Beaty, D. W., Farr, T.G., Gogineni, P., Grant, J., Grimm, R., Leuschen, C., Olhoeft, G. R., Safaeinili, A., 2001, Report of the virtual instrument Science Definition Team on Surface EM Experiments for Mars 2007: from JPL to NASA Headquarters, May 2001, 19p.
152. *Olhoeft, G.R., 2001, Subsurface geophysical detection methods to uniquely locate water on Mars: invited keynote address to Conference on the Geophysical Detection of Subsurface Water on Mars, August 2001, Houston, LPI Publication 1095, p. 72-73.
Adobe PDF Download 47,604 bytes
153. Grimm, R.E. and Olhoeft, G.R., 2001, Implementation of geophysical techniques for DNAPL delineation: complex resistivity surveys at the Savannah River site A-014 Outfall: Final report to USDOE contract DE-AF08-01NV14027, 60p.
154. Grimm, R.E., Daily, W., Morgan, F.D. and Olhoeft, G.R., 2001, Implementation of Geophysical Techniques for DNAPL Delineation: Electrical-Impedance Tomography And Related Surveys at the Savannah River Site A-014 Outfall: Group consensus report, USDOE National Nuclear Security Administration, Nevada Operations Office, Las Vegas, NV, 12p.
155. Grimm, R.E. and Olhoeft, G.R., 2001, Integrated geophysical detection of DNAPL source zones: Final report on SERDP Project CU-1090 to AFRL, Hill AFB, UT on contract #F08637-98-C-6006, 67p. + 2 CD-ROMs.

156. Olhoeft, G.R. and Selig, E.T., 2002, Ground penetrating radar evaluation of railway track substructure conditions: GPR2002, 9th International Conference on Ground penetrating radar, Santa Barbara, CA, April, 2002, S.K Koppenjan and H.Lee, eds., Proc. of SPIE vol. 4758, p. 48-53. Adobe PDF Download 5,173,478 bytes
157. Olhoeft, G.R., 2002, The new ground penetrating radar regulatory environment:GPR2002, 9th International Conference on Ground penetrating radar, Santa Barbara, CA, April, 2002, S.K Koppenjan and H.Lee, eds., Proc. of SPIE vol. 4758, p.115-120, Adobe PDF Download 448,983 bytes
158. McKinley, K., Oshetski, K. and Olhoeft, G.R., 2002, The use of complex resistivity to monitor the biooxidation of gold ore: in Proc. of SAGEEP 2002, Las Vegas, NV, February 2002, 5p.
159. Farr, T. and 37 others (incl. Olhoeft), 2002, Terrestrial analogs to Mars: Planetary Decadal Study Community White Paper, Solar System Exploration Survey 2003-2013, 25p.

 

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