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Biographical  Courses Offered  Current Research  Publications  

Contents updated Jan 20, 2004       

Gary L. Oppliger, Ph.D.
Research Associate Professor

Arthur Brant Laboratory for Exploration Geophysics 

Department of Geological Sciences, MS 172
University of Nevada, Reno
Reno, NV 89557-0138
Office: 775-784-7056
email: oppliger@mines.unr.edu

Personal web page: http://www.unr.edu/mines/able/People/Oppliger/

Biographical Sketch

Publications and Presentations

Courses Taught

Funded Research

InSAR Reservoir Monitoring - Geothermal Production Enhancement, Desert Peak, Nevada - GBCGE - DOE.

InSAR-GPS Investigation of Seasonal Groundwater Response In Reno NASA EPSCoR Core.

Gravity Analysis of Basement Structure, Geothermal Exploration, Desert Peak, Nevada - GBCGE - DOE.

Great Basin Potential Fields GIS products - Geothermal Exploration - GBCGE - DOE.

Developmental Research

Developing an Ultra High Resolution Local Gravimetric Geoid Model For The Reno-Tahoe Region

Developing a Versatile Geomagnetic Acquisition System for Crustal Conductivity Mapping and Continuous Magnetic Field Monitoring  

Extensional and Strike-Slip Faulting Interactions In the Northern Sierran – Great Basin Transition Zone Inferred from New Integrated Gravity Data

Gravity`s Potential to Contribute to Deep Crustal Investigations of the Northern Sierran - North Walker Lane Region


Biographical Sketch:

Dr. Gary Oppliger is an Associate Research Professor in the Arthur Brant Laboratory for Exploration Geophysics in the Geological Sciences Department at the University of Nevada, Reno (since Nov. 1999), where he teaches mining and resource geophysics courses in his specialties of electromagnetic and potential field exploration methods. He completed his Ph.D. in Engineering Geoscience from U. C. Berkeley in 1982, where he specialized in electromagnetic exploration methods including aspects of field instrumentation, signal processing and electrical modeling. Dr. Oppliger’s experience includes 18 years as a research and exploration geophysicist for major mining exploration companies, where his work involved the development of industry leading mineral exploration technologies -  including image processing methodologies and potential field acquisition systems - and the geologic analysis of geophysical information – much of it applied to the Great Basin of the Western U.S.A.  His recent research at UNR includes interferometric radar (InSAR), GPS and gravity investigations of basins in northwestern Nevada for geologic structure, groundwater, and geothermal resources.

Education

Ph.D. University of California, Berkeley, 1982. (Engineering Geoscience)
 Potential field and Electromagnetic Geophysics - Thesis advisor H. F  Morrison.
M.S.  University of California, Berkeley, 1977. (Engineering Geoscience)
B.S.   University of California, Berkeley, 1975. (Engineering Geoscience)

Current Research

Funded Research

InSAR Reservoir Monitoring - Geothermal Production Enhancement

Investigating the relation between geothermal reservoir compaction, geometry and production rates from a ten-year InSAR ground displacement history at the Bradys and Desert Peak fields: Assessing the potential of retrospective InSAR monitoring to assist reservoir management and expansion over fields without previously documented subsidence
Gary Oppliger1 (PI), Mark Coolbaugh2 (Co-PI), William Foxall3 (collaborator)
1Arthur Brant Laboratory for Exploration Geophysics, University of Nevada, Reno.
2 Great Basin Center for Geothermal Energy, University of Nevada, Reno.
3
Lawrence Livermore National Laboratory
A GBCGE project supported by the Department of Energy Under DE-FG36-02ID14311 July 2003 - Sept 2005.  Funded $43,000 in Year 1.      Project Page Link


InSAR-GPS Investigation of Seasonal Groundwater Response in Reno

An Interferometric Synthetic Aperture Radar (InSAR) research capability for developing integrated groundwater-monitoring methods. 
Gary L. Oppliger (PI),  Arthur Brant Laboratory for Exploration Geophysics, UNR
A project supported by NASA EPSCoR UCCSN-03-17 core funding,   Project Page Link


Gravity Analysis of Basement Structure, Geothermal Exploration, Desert Peak, Nevada

Structural and Geophysical Analysis of the Desert Peak-Brady Geothermal Field: Identifying links between northeast-trending structures and geothermal anomalies in the Great Basin   
James Faulds (PI), Larry Garside (PI), Nevada Bureau of Mines and Geology (NBMG)  
Gary Oppliger (PI), Department of Geological Science, ABLE, UNR
Geothermal Resources Council Annual Meeting Reno NV, Sept 24, 2002. Presentation and published extended abstract. 
A GBCGE project supported by the Department of Energy Under DE-FG07-02ID14311  March 2002 -  April 2003.  
Gravity Project Link


Gravity GIS Image Database - Geothermal Exploration:

An Improved Resolution GIS compatible Gravity and Aeromagnetic Data Sets for Great Basin Geothermal Exploration  Gary Oppliger  - A database development task under the Great Basin Center for Geothermal Energy’s - Geopowering of the West Project - PIs James V. Taranik and Lisa Shevenell. Supported with Department of Energy funding under DE-FG07-02ID14311.   Project Page Link 


Developmental Research

Ultra High Resolution Local Gravimetric Geoid Computation

Developing an Ultra High Resolution Local Gravimetric Geoid Model For The Reno-Tahoe Region   Project Page Link
Gary Oppliger
,, Arthur Brant Laboratory for Exploration Geophysics, University of Nevada, Reno.

Supported by Arthur Brant Laboratory for Exploration Geophysics

Project Summary: The GPS and InSAR methods are beginning to be widely applied to detect natural and man induced changes in ground elevations of potential economic importance that may be less than one centimeter per year. These measurement methods promise to extend and replace traditional optical sprit leveling in many applications. The successful fusion of measurement data from these new and traditional methods requires a local sub-centimeter accuracy geoid model to relate the ellipsoidal heights of GPS and InSAR to orthometric sea-level heights. This project will examine and evaluate a new computational protocol for developing and maintaining local gravimetric geoid models.  The method promises higher spatial resolution independent of local elevation and an improved facility for revision as new gravity control  becomes available. 


Geomagnetic Surveying for Crustal Conductivity Mapping and Monitoring

Developing a Versatile Geomagnetic Acquisition System for Crustal Conductivity Mapping and Continuous Magnetic Field Monitoring  
 
Project Page Link- placeholder
Gary Oppliger,, Arthur Brant Laboratory for Exploration Geophysics, University of Nevada, Reno.
James Scott,  Ph.D. Geophysics Program,
University of Nevada, Reno.

Supported by Arthur Brant Laboratory for Exploration Geophysics. Shared instrumentation support from a Keck Foundation grant to Mackay School of Mines through Bob Karlin (Fluxgate sensors) and DOE support to Nevada Seismological Lab through John Louie (Texan 24bit recorders).   


Gravity Applied to Regional Geology and Tectonics:

Extensional and Strike-Slip Faulting Interactions In the Northern Sierran – Great Basin Transition Zone Inferred from New Integrated Gravity Data
OPPLIGER, Gary L.1, WIDMER, Michael2, FAULDS, James E.3, and HENRY, Christopher D.3, (1) Geological Sciences, Univ of Nevada Reno, (2) Water Resources, Washoe County,(3) NBMG
GSA Denver Annual Meeting October 27, 2002.
Geophysics/Tectonophysics/Seismology (Oral). .  Abstract and PowerPoint Presentation Link

Supported by Arthur Brant Laboratory for Exploration Geophysics and Washoe County Water Resources.


Gravity Constraints on Deep Crustal Structure  

Gravity's Potential to Contribute to Deep Crustal Investigations of the Northern Sierran - North Walker Lane Region   Project Notes Link

Gary Oppliger,, Arthur Brant Laboratory for Exploration Geophysics, University of Nevada, Reno.

Supported by Arthur Brant Laboratory for Exploration Geophysics


Publications

Journal and Conference Publications 

  Coolbaugh, M., Sawatzky, D., Oppliger, G., Minor, T.,  Raines, G., Shevenell, L., Blewitt, G., 2003, Geothermal GIS Coverage of the Great Basin , USA: Defining Regional Controls and Favorable Exploration Terrains  Geothermal Resources Council Transactions Vol. 27. (in press).  

   Faulds, J., Garside, L., Oppliger, G.2003, Structural Analysis of the Desert Peak-Brady Geothermal Fields, Northwestern Nevada: Implications for Understanding Linkages between Northeast-Trending Structures and Geothermal Reservoirs in the Humboldt Structural Zone   Geothermal Resources Council Transactions Vol. 27. (in press).

   Faulds, J., Garside L., Johnson, G., Muehlberg, J.,Oppliger, G., 2002, Geologic Setting and Preliminary Analysis of the Desert Peak-Brady Geothermal Field, Western Nevada , Geothermal Resources Council Transactions. Vol 26. p491-494

   Murphy, B. J., Oppliger, G. L., Brimhall Jr, G., and Hynes, A. J., 1999, Mantle Plumes and  Mountains: American Scientist, v. 87, p. 146-153. March-April issue.

   Murphy, B. J., Oppliger G. L., Brimhall Jr, G., and Hynes, A. J., 1998, Plume Modified Orogeny: an example from the southwestern United States: Geology 26:731-734.

  Oppliger, G. L., Murphy, B. J., Brimhall Jr, G., 1997, Is the ancestral Yellowstone hotspot
responsible for the Tertiary “Carlin mineralization in the
Great Basin of Nevada ?: Geology 25:627-30.

  Nabighian, M. N., Oppliger, G. L., et. al., 1984, Cross-Hole Magnetometric Resistivity (MMR): Geophysics, Vol. 49 No. 8; P 1313-1326, 15 Figs., 1 Table. 

  Oppliger, G. L., 1984, Three-Dimensional Terrain Corrections for Mise-a-la-masse and Magnetometric Resistivity Surveys: Geophysics, Vol. 49, No. 10; P. 1718-1729. 15 Figs. 

Presentations:

   Cashman, P., Trexler, J.,  Muntean, T.,  Faulds, J., Louie, J.,  Oppliger, G., Abbott, R., Clark, M., 2003 Neogene Tectonic History of the Sierra Nevada – Basin and Range Transition Zone at the Latitude of Carson City, Nevada: Geological and Geophysical Evidence  , GSA Seattle Annual Meeting, Nov 2, 2003 Poster & published abstract.

   Coolbaugh, M., Sawatzky, D., Oppliger, G., Minor, T.,  Raines, G., Shevenell, L., Blewitt, G., 2003, Geothermal GIS Coverage of the Great Basin , USA: Defining Regional Controls and Favorable Exploration Terrains  Geothermal Resource Council's Annual Meeting, Morelia, Mexico October, 2003. Presentation.

    Faulds, J., Garside, L., Oppliger, G., 2003, Structural Analysis of the Desert Peak-Brady Geothermal Fields, Northwestern Nevada: Implications for Understanding Linkages between Northeast-Trending Structures and Geothermal Reservoirs in the Humboldt Structural Zone   Geothermal Resource Council's Annual Meeting, Morelia, Mexico October, 2003. Presentation.

   Oppliger, G.  L. (presenter), Widmer, M., Faulds, J. E., Henry, C. D., 2002, Extensional and Strike-Slip Faulting Interactions In the Northern Sierran – Great Basin Transition Zone Inferred from New Integrated Gravity Data , GSA Denver Annual Meeting Oct 27, 2002. Oral presentation and published abstract.

   Faulds, L. Garside, G Oppliger, G  (presenter), 2002, Structural and Geophysical Analysis of the Desert Peak-Brady Geothermal Field: Identifying links between northeast-trending structures and geothermal anomalies in the Great Basin  J., Geothermal Resources Council Annual Meeting Reno NV, Sept 24, 2002 . Oral presentation and published extended abstract.

   Smailbegovic, A. (presenter), Oppliger, G. L., Mihalasky, M. J.,  Taranik, J. V., 2002, Structural and Lithologic Constraints to Metallogenesis in The Bodie Hills, Nevada and California, Interpreted with Geophysical and Geostatistical Methods,  Denver Annual Meeting ,Oct 27, 2002. Poster and published abstract.

   Murphy, B., Hynes, A., Johnston, S, Oppliger, G., 2001, Flat Slab Subduction in the Geological Record: Consideration of Modern Analogs, GSA Annual meeting 2001. Oral w/published abstract.

Workshops and Seminars:

   Oppliger, G., L., 1998, Nevada's Gold Belts: Convergence of Mineral Technology and An Unusual Geologic History, U. C. Berkeley, Material Science and Mineral Engineering Departmental Seminar, Oct 29, 1998, invited speaker.

  Oppliger, G. L.,1998, Is the ancestral Yellowstone hotspot responsible for the Tertiary Carlin mineralization of Nevada and the Laramide Orogeny?: Geological Society of Nevada, Elko 1998.


Courses Taught   (see ABLE Faculty Courses for more information)

Taught Spring 04

GEOL 702h – Spring 04 - Advanced Geophysics - individual guided study in any of the areas of Potential Fields Methods, Electromagnetic Methods, or Interferometric Radar Methods.  Content will be customized toward the student's research interests. Instructor consent required. Contact Dr Oppliger for details.

To be offered Fall 04

GEOL 493-693 - Fall 04 Mining Exploration Geophysics - Introduction to Ground-based, Airborne and Spaceborne Imaging Methods for Earth Resource Applications  Syllabus   Taught jointly by Dr Gary Oppliger and Dr James Taranik.   An introductory level survey of methods employed by earth scientists and engineers to image, and map surface and subsurface geologic features and resources.  Geophysical imaging methods are integral  elements of most modern geoscience investigations. These methods play leading roles in the creation of geologic maps, the determination of geologic resource potential, and the discovery and protection of subsurface resources.   This course examines the full range of remote investigative technologies – including, both, remote imaging (satellite and aircraft imaging) and subsurface sensing methods (magnetic, gravity, ground penetrating radar, electrical and seismic).   The labs work with the practical aspects of accessing data resources,  survey design, GPS surveying methods, digital map construction, and GIS data integration and visualization.  For each class of method, the focus is on understanding:  1) physical principles,  2) extraction of geologic information from measurements, and  3) effective applications.   

GEOL 701h  -  Fall 04 -  Advanced Geophysics - individual guided study in any of the areas of Potential Fields Methods, Electromagnetic Methods, or Interferometric Radar Methods.  Content will be customized toward the student's research interests. Instructor consent required.   

To be offered Spring 05

GEOL 7XX – Spring 05 - Geophysics – Remote Sensing for Geoscience Applications - Imaging Radar   Jointly taught by Dr. Taranik and Dr. Oppliger.  A new course number will be assigned. <Fall 2003 course web page

Recently Taught 

GEOL 702h – Fall 2003 - Geophysics – Remote Sensing for Geoscience Applications - Imaging Radar  To be jointly taught by Dr. Taranik and Dr. Oppliger. This course reviews fundamental principles of aerospace remote sensing in the microwave portions of the electromagnetic spectrum.    Link to course web page.

GEOL 450 -   Spring 2003, 2002 -  Field Methods GPS Lab sessions assignments and lectures 
GEOL 702h - Spring 2002 - Advanced Potential Fields Methods  
GEOL 702h - Spring 2003 & 00 - Natural Geomagnetic Field Exploration Methods
GEOL 693   - Fall  2002 -  Potential Fields and EM Methods  - graduate level  Syllabus - This course focuses on understanding the principles and processes that make these geophysical methods useful in the geosciences. Laboratory sessions provide experience with high level processing, interpretation and modeling software.  Interactive three-dimensional visualizations of actual electromagnetic survey systems are used to compare and contrast various methods.  Note: The advanced content of GEOL 693 is now offered by Dr Oppliger in GEOL 702h individual guided research courses - see above. 
GEOL 493   - Fall 2001-  Introduction to Exploration Geophysics - undergraduate level