Professor
Department of Geology
Utah State University
Logan, UT 84322-4505
435-797-1267 office
435-797-1588 fax Jpevans@cc.usu.edu

IF YOU ARE INTERESTED IN CONTACTING
THE JOURNAL OF STRUCTURAL GEOLOGY (http://www.elsevier.nl/locate/jstrugeo)

 PLEASE email:
jsg@cc.usu.edu

---

---

Skip to:

Research and Teaching interests -  What I do

• The hydrology of faults in a crystalline thrust sheet, including laboratory measurements of fault rock permeability (see Evans et al., 1997, JSG)
• Detailed mapping and geochemical study of faults related to the San Andreas fault [photo], which shows how  large amounts of slip are localized on very narrow faults of the San Andreas system (see Chester et al., 1993; Evans and Chester, 1995, and Schulz and Evans, 1998)   [photo]
• The development of and in situ permeability structure of the Bighole fault, San Rafael Swell, Utah.  We have drilled a tip zone of a small, reservoir-scale fault zone mapped in detail by Zoe Shipton of the University of Edinburgh for her Ph. D.  The five drillholes were continously cored, logged, and a complete suite of borehole geophysics was run, and now we are trying to figur eout how to correlate the various data sets, and to predict permeability along the fault zone.   See http://www.usu.edu/~uf3/  for details.
• Study of well exposed faults in the Sierra Nevada, California, with the goals of determining the likely three-dimensional structure of the faults, and developing new stochastic models for faults and fault growth.  Collaboration with Kevin Hestir, Steve Martel  (http://www.soest.hawaii.edu/martel/Stevem.html) , and Jane Long of the University of Nevada, Reno.
• The structural influences on gold mineralization in Nevada, where open-pit gold mines are located along fault intersections (see  http://www.usu.edu/~uf3/people/kjill.htm ) and faults in sedimentary rocks in Japan, where mines and underground labs provide exposures of faults, and Ron Jeffreys will determine the mechanical properties and microstructures of the fault rock.
• Structural analysis of complexly deformed rocks in the Park City, Utah, area, to characterize the bedrock hydrogeology.  Much of the development in the area is in bedrock, and wells are being drilled in some complicated compressional structures which greatly influence the hydrogeology.  This is Kelly Bradbury's work, along with with Adolph Yonkee, Weber State University.  (See Keighley et al., 1997).
• We examine the textures and deformation mechanisms in faults in the upper crust, and also examine how fluids move to, and through, the faults.  We use optical and scanning electron microscopy, combined with mapping, drilling,  borehole geophysics,  and geochemistry to identify fluid paths in the faults.  Students do a fair bit of field work, structural analysis, and synthesis related to the specific topic of interest.  This work is part of the efforts of UF3 - Utah Faults, Fluids, and Fractures - a loose collaboration of workers in Utah interested in the geologic ipact of fluid flow in and near faulted and fractured rocks.  For much more information on this, please see: http://www.usu.edu/~uf3/ .
• The bottom line:  I love to figure out, and help others figure out, deformed rocks - how they got that way, what it means, what it might mean for a host of academic and applied problems.  We do lots of stuff, and we enjoy it a lot !

Teaching Interests

• I teach a variety of courses, including Planet Earth - an introductory level integrate earth science claoss, Structural Geology - the class which examines the geometry, kinematics, mechanics, and processes of rock deformation;  Field Methods - introduction to  geology in the field, Geologic Field Camp - a 4 week intensive capstone class for geologistsl;  Mechanics of Earth processes - basic mechanics class for graduate students in Geology, Engineering, Geography, and Watershed Science.

Several other good links to geo stuff are:
Utah Geology:     http://www.usu.edu/~geoldept/    or:  http://www.ugs.state.ut.us/
Structural geology stuff :   http://home.earthlink.net/~schimmrich/structure/structure.html
Susanne Janecke's homepage:
• The UF3 page:

Education

Employment

July 1991- June 1997
Associate Professor, Department of Geology, Utah State University, Logan, UT 84322-4505

January 1987 - June, 1991
Assistant Professor, Department of Geology, Utah State University, Logan, UT 84322-4505

In my spare time, I am the editor of the Journal of Structural Geology, which publishes the results of research on structural geology and rock deformation.  For more information about the journal, see  http://www.elsevier.nl/locate/jstrugeo

Several other good links to geo stuff are:

Utah Geology:     http://www.usu.edu/~geoldept/    or:  http://www.ugs.state.ut.us/
Structural geology stuff :   http://home.earthlink.net/~schimmrich/structure/structure.html
The UF3 page:

Return to the top of the page

Title, Agency, Amount; Duration; Co-PI's

Subsurface hydraulic properties of faults in sandstone aquifers and correlation with geologic data, DOE $262,000; 1998-2001, Co-PIís Thomas Lachmar and Kevin Hestir

U.S. Japan Center (NSF/DOD) $4,000 Travel Grant for US-Japan collaborations on fault research, 1998-1999

Growth of faults and scaling of fault structure, DOE $219,358, 6/1/98-5/31/01, with Kevin Hestir, Math and Stat, USU:  Steven J. Martel, Univ. Hawaii, Jane Long, Univ. Nevada, Reno

Hydraulic structure of normal faults in carbonate reservoir analogs, Nevada $45,000,   10/1/97 - 6/30/97   Energy and Geoscience Institute and Enterprise Oil and Gas

Three-dimensional hydrogeology of fault zones, Department of Energy, $416,459; 4/1/95-3/30/98; Co-PIs Kevin Hestir; Steven Martel Univ. Hawaii, Jane Long, Janet Jacobsen, Lawerence Berkeley Lab.

Collaborative Research (St. Louis University and Utah State University): Geologic studies of deeply exhumed faults of the San Andreas system, souther California, $33,582; 3/7/95-3/6/96.

Collaborative Research: Geologic studies of deeply exhumed faults of the San Andreas System, Southern California; U. S. Geological Survey NEHRP $39,200, 3/1/94 - 2/28/95.

Collaborative Research: Weakening and slip mechanisms in large-displacement faults of the San Andreas system: Characterization and experimental investigations, National Science Foundation, (Tectonics) $61,000 USU; 7/1/92-12/31/94; with Fred Chester, St. Louis University.

Deformation of the footwall of thrust faults and its implications for the kinematics and mechanics of thrust sheet emplacement; Petroleum Research Fund, American Chemical Society, $37,800; 7/1/92 -6/30/94.

Physically based stochastic models of fractures and fluid flow in rock; National Science Foundation (Mathematical Sciences), $99,844; 8/1/92 - 12/31/94; PI: Kevin Hestir, co PI's: James Evans, Joesph Koebbe, Craig Forster, and Steven Martel.

Field and model studies of the hydrogeologic and structural evolution of faults in granitic rocks in the upper crust; National Science Foundation, $90,527, 7/1/90-6/30/92; Craig Forster.

Structural setting of seismicity in northern Utah; Utah Geological and Mineral Survey, $3,025; 7/1/89-6/30/90.

Geologic map and description of the Logan, Utah 7.5' quadrangle; Utah Geological and Mineral Survey $1,500; 7/1/89-12/1/90.

Return to the top of the page

The Publications - I only list  the last 10 yrs. or so.

Refereed Papers  (the bold indicates students who have worked with me.)

1998

Schulz, S. E., and Evans, J. P. 1998,  Spatial variability in microscopic deformation and composition of the Punchbowl fault, Southern California: implications for mechanisms, fluid-rock interaction, and fault Morphology, Tectonophysics, 295, p. 223-244).

1997

Evans, J. P., Forster, C. B., and Goddard, J. V., 1997, Permeabilities of fault-related rocks and implications  for fault-zone hydraulic structure, J. Structural Geology, v. 19, pp. 1393-1404.

Evans, J. P., Yonkee, W. A., Parry, W. T., and Bruhn, R. L., 1997, Fault-related rocks of the Wasatch normal fault, in:  Brigham Young University Studies in Geology, Geological Society of America Fieldtrip Guidebook, v. 42, p. 279-297.

Keighley, K. E., Yonkee, W. A., Ashland, F. X., and Evans, J. P., 1997, Structural Geology of Western Snyderville Basin, and Its Impact on Hydrogeology in a Rapidly  Developing Region, in:  Brigham Young University Studies in Geology, Geological Society of America Fieldtrip Guidebook, v. 42, p. 325-344.
 

1996

Caine, J. S., Evans, J. P., and Forster, C. B., Fault zone architecture and permeability structure, Geology, v.  18, p. 1025-1028.

Chester, F. M., and Evans, J. P., in press, Fault-related rocks from deeply exhumed faults of the San Andreas system, in: Atlas of mylonitic and fault-related rocks, A. W. Snoke, J. A. Tullis, and V. R. Todd, eds., Princeton University Press.

Evans, J. P., in press,  Reaction-weakening in phyllonites formed in granite,  in: Atlas of mylonitic and fault-related rocks, A. W. Snoke, J. A. Tullis, and V. R. Todd, eds., Princeton University Press.

______,  in press, Deformation of granitic rocks at shallow crustal levels,  in: Atlas of mylonitic and fault-related rocks, A. W. Snoke, J. A. Tullis, and V. R. Todd, eds., Princeton University Press.

_____, Influence of biotite and foliation on brittle deformation of gneiss,  in: Atlas of mylonitic and fault-related rocks, A. W. Snoke, J. A. Tullis, and V. R. Todd, eds., Princeton University Press.

Evans, J. P., McCalpin, J. P., and Holmes, D. C., 1996, Geologic map and description of the Logan, Utah, 7.5' quadrangle, Utah Geological Survey Map 96-1, 16 p., 2 plates.

Evans, J. P., and Oaks, R. Q., Jr., 1996,  Three-dimensional variation in extensional fault shape and basin form: The Cache Valley basin, eastern Basin and Range Province, USA, in: Geological Society of America Bulletin, v. 108, p. 1380-1393.

1995

Evans, J. P., and Chester, F. M., 1995,  Fluid-rock interaction and weakening of faults of the San Andreas system: inferences from San Gabriel fault-rock geochemistry and microstructures, Journal of Geophysical Research, v.  100,  p. 13007-13020.

Goddard, J. V., and Evans, J. P., 1995, Fluid-rock Interactions in Faults of Crystalline Thrust Sheets, NorthwesternWyoming, U. S. A.;  Inferences from Geochemistry of Fault-related Rocks, Journal of Structural Geology, v. 17, p. 533-549.

1994

Evans, J. P., and Langrock, H., 1994,  Structural analysis of the Brigham City-Weber Segment Boundary zone, Wasatch Normal fault zone, Utah: Implications for fault growth and structure, in: Pure and Applied Geophysics, v. 142, p. 663-685.

1993

Chester, F. M., Evans, J. P., and Biegel, R. L., 1993, Internal structure and weakening mechanisms of the San Andreas fault, Journal of Geophysical Research, v. 98, p., 771-786.

Evans, J. P.,1993,  Deformation mechanisms and kinematics of a crystalline-cored thrust sheet: The Washakie thrust system, Wyoming, in : Schmidt, C. J., Chase, R., and Erslev, E. A., eds., Basement deformation in Rocky Mountain Foreland structures, Geological Society of America Special Paper 280, p. 147-161.

 Evans, J. P., DuBois, M. A., Batatian, D., Derr, D., Harlan, S., Malizzi, L., McDowell, R., Nelson, G., Parke, M., Schmidt, C. J., and Weberg, E., 1993, Mechanisms and kinematics of a Precambrian-cored fold and fault structure: Jakey's Fork, Wyoming, in: Schmidt, C. J., Chase, R., and Erslev, E. A., eds., Basement deformation in Rocky Mountain Foreland structures, Geological Society of America Special Paper 280, p. 163-176.

 Schmidt, C. J., Evans, J. P., Harlan, S., Batatian, D., Derr, D., DuBois, M., Malizzi, L., McDowell, R., Nelson, G., Parke, M., and Weberg, E., 1993, Mechanical behavior of basement rocks, Scarface thrust, central Madison Range, Montana, in: Schmidt, C. J., Chase, R., and Erslev, E. A., eds., Basement deformation in Rocky Mountain Foreland structures, Geol. Soc. America Special Paper 280. p.  89-105.

1992

Evans, J. P., and Neves, D. S., 1992,  Footwall deformation along the Willard thrust, Sevier orogenic belt:  Implications for mechanisms, timing and kinematics, Geological Society of America Bulletin, v. 104, p.  516-527.

1991

Evans, J. P., 1991, Structural Setting of Seismicity in northern Utah, Utah Geological Survey Contract Report 91-15, 37 p., 3 plates.

Forster, C. B., and Evans, J. P., 1991, Fluid flow in thrust faults and crystalline thrust sheets: Results of combined field and modeling studies, Geophysical Research Letters, v. 18, p. 979-982.

1990

Evans, J. P., 1990, Textures and deformation mechanisms and the role of fluids in cataclastically deformed granitic rocks, in: Knipe, R. J., and Rutter, E., eds., Deformation Mechanisms, Rheology, and Tectonics, Geological Society of London Special Publication no. 54, p. 29-39.

Evans, J. P., 1990, Thickness-displacement relationships for fault zones, J. of Structural Geol., v. 12, p. 1061-1066.

Smith, L., Forster, C. B., and Evans, J. P., 1990, Interaction between fault zones, fluid flow and heat transfer at the basin scale, in: Hydrogeology of low Permeability environments, (S. P. Newman and I. Neretnieks, eds.), International Association of Hydrological Sciences selected papers in Hydrogeology, v. 2, p. 41-67.
 
 

Unrefereed and miscellaneous publications:
 

Evans, J. P., and Chester, F. M. , Fluid-Rock Interaction and weakening in faults of  the San Andreas system: Inferences from San Gabriel Fault-Rock Geochemistry and Microstructures, in: U. S. Geological Survey "Redbook" Fluids and Faulting, Bruhn, R. L., Hickman, S., and Sibson, S., eds.

Evans, J. P., and Craddock, J. P., 1985, Deformation history and displacement transfer between the Crawford and Meade thrust systems, Idaho-Wyoming thrust belt, in, Kerns, GJ., and Kerns, R.L., eds., Orogenic Patterns and stratigraphy of North-central Utah and Southeastern Idaho, Utah Geol. Assoc. Guidebook 14, p. 83-96.

Evans, J. P., Yonkee, W. A., Parry, W. T., and Bruhn, R. L.,  1997, Fault-related rocks of the Wasatch normal fault, Utah;  In: Brigham Young University Studies in Geology, Geological Society of America Fieldtrip Guidebook, v. 42, p. 279-298.

Forster, C. B., Goddard, J. V., and Evans, J. P.,  Permeability structure of a thrust fault, in: U. S. Geological Survey "Redbook" Fluids and Faulting, Bruhn, R. L., Hickman, S., and Sibson, S., eds.

Keighley, K. E. and Evans, J. P., 1997.  Structural geology applied to the evaluation of fractured sedimentary bedrock aquifers in the Pinebrook Subdivision, Summit County, Utah.  In: Four Corners Geological Society Symposium on Fractured Natural Systems, 173-189.

Yonkee, W. A., Evans, J. P., and DeCelles, P. G., 1992, Mesozoic tectonics of the northern Wasatch Range, Utah, in:  Field Guide to geologic excursions in Utah and adjacent areas of Nevada, Idaho, and Wyoming, Utah Geological Survey Misc. Pub. 92-3, J. R. Wilson, ed., p. 429-459.

Editing

 Special Editor:  Fault-related folding, Journal of Structural Geology Special Issue, 1997.

       Granite transport, emplacement, and deformation, Journal of Structural Geology, 1998.

       Twentieth Anniversary Issue, Journal of Structural Geology, 1999.

Recent Abstracts

1998

Evans, J. P., Lachmar, T. L., Robeson, K., Schieb, B., Shipton, Z., Forster, C. B., and Snelgrove, S.  submitted, Detailed Three-Dimensional  Fault Zone Structure and Hydraulic Properties of the Big Hole Normal Fault, Utah, to American Association of Petroleum Gologists annual meeting.

Hammond, K. J., and Evans, J. P., in press, Variations in deformation along a moderately dipping normal fault, central Nevada, Geological Society of America Annual Meeting.

1997

Hestir, K., Yang, J., Martel, S. J., and Evans, J. P., 1997, A mechanically based stochastic model for a fault zone conditioned on field data, Geol. Soc. Am. Abst. w. Progs., v. 29, p. A. 198.

Lim, J. S., and Evans, J. P., 1997,  Three-dimensional structure analysis of small left-lateral faults in Sierra Nevada, Geol. Soc. Am. Abst. w. Progs., v. 29, p. A. 258.

Robeson, K. R., and Evans, J. P., 1997,  Three-dimensional structure of a small strike slip fault zone, Geol. Soc. Am. Abst. w. Progs., v. 29, p. A. 258.

1996

Evans, J. P., Martel, S., and Yang, J, 1996, Three-dimensional structure, mineralization, and fluid flow along small strike slip faults in granite,  Geol. Soc. Am. Abst. w. Progs., v. 28, p. A. 254.

 Evans, J. P., Yonkee, W. A., and Fiesinger, D. W.,  1996, Short duration field camps: Educational objectives and techniques for time and finacial savings, Geol. Soc. Am. Abst. w. Progs., v. 28, p. A. 203.

Evans, J. P., and Schulz, S. E., 1996, Three-dimensional networks of faults in the San Gabriel Mountains, southern California, and implication for seismogensis on thrust and strike-slip faults, EOS, Trans. Am. Geophys. Un., v. 77, p. F 644.

Evans, J. P., Yonkee, W. A., and Brown, C. B., 1996, Evolution of small-displacement faults in sandstones related to footwall folds, Mitten Park structure, Utah and Wyoming: in:  Faulting and Fault Seals, Tectonic Studies Group special Meeting, 23-25 Sept., 1996.

Hestir, K., Yang, J., Evans, J. P., Martel, S. J., and Long, J. C. S., 1996, A three-dimensional model for fault zone structure and flow, EOS, Trans. Am. Geophys. Un., v. 77, p. F 235.

Keighley, K. E., and Evans, J. P., 1996,  Structural and hydrogeological analysis of deformed sedimentary bedrock aquifers, Summit County, Utah, Geol. Soc. Am. Abst. w. Progs., v. 28, p. A.247.

 Martel,  S. J., and Evans, J. P., 1996, Structure of a Sierra Nevada fault zone and hydrologic implications,   Geological Society of Am. Abst., v. 28, p. A-135.

Pollock, C., and Evans, J. P., 1996, Physical modeling of fault zone evolution for joints reactivated as left-lateral strike-slip faults, Geol. Soc. Am. Abst. w. Progs., v. 28, p. A-245.

Schulz, S. E., and Evans, J. P., 1996, Spatial variability in deformation and geochemistry across the Punchbowl fault, southern California:  Implications for scale-dependance of fault-related structures, Geol. Soc. Am. Abst. w. Progs., v. 28, p. A. 437.

Schulz, S. E., Evans, J. P., and Pollock, C. J., 1996, Morphology of an exhumed large displacement strike-slip fault, Geol. Soc. Am. Abst. w. Prog., v. 28, #5, p. 110.

Swenson, M . L., Jensen, P. W., Willsey, S., Evans, J. P., and Yonkee, W. A., 1996, Geologic map and structural analysis exercise at the northern termination of the Darby thrust, Wyoming thrust belt, Geol. Soc. Am. Abst. w. Progs., v. 28, p. A. 329.
 

 Last Updated  (Finally !)  19 August 1999