Research And Development Hub

Articles submitted to Stanford Geothermal Workshop, 2016

The Geology, Geochemistry, and Hydrology of the EGS FORGE Site, Milford Utah

Stuart Simmons, Stefan Kirby, Clay Jones, Joe Moore, Rick Allis

EGI, University of Utah, 423 Wakara Way, Ste 300, Salt Lake City, Utah
Utah Geological Survey, PO Box 146100, Salt Lake City

e-mail: ssimmons@egi.utah.edu

The Milford FORGE site, located 16 km northeast of Milford City, Beaver County, and 350 km south of Salt Lake City, is ideal as an EGS field laboratory. The site covers an area of about 25 km2 and is underlain by large volumes of granite and gneiss at temperatures in the range of 175 – 225°C at 2 to 4 km depth. A deep exploration well, Acord-1, drilled in 1979 to 3.8 km depth 5 km from the proposed drill site, encountered granite and gneiss at 3.1 km depth and a temperature at total depth of 230°C. Read More

Information about the geological setting of the FORGE site, water-rock interaction effects, and fluid chemistry come from investigations of the Acord-1 well and drill cores cuttings and production fluids from Blundell-Roosevelt steamfield, which is situated ~5 kms to the east. The shallow hydrology is known from a number of distributed ground water wells.

Preliminary results indicate the crystalline rocks that will host the EGS laboratory comprise plagioclase, hornblende, biotite, and magnetite which are weakly altered to illite, chlorite, calcite, epidote, and anhydrite. New analyses indicate the reservoir fluids at Blundell-Roosevelt are largely unchanged since production began in 1984, except for effects of steam-loss and partial inmixing of reinjected waters. The compositions of ground waters from wells, especially Cl/B, reveal a large but shallow outflow zone that extends across the FORGE site, down gradient from Roosevelt hot springs area. These data suggest that ground waters are a viable source of fluid required for stimulation experiments and that the resulting effects of water-rock interaction, notably mineral deposition reducing permeability, will be minimal. Articles can be downloaded from the following links. Allis Paper, Hardwick Paper and Simmons et all Paper.

Enhanced Geothermal System Concept Testing and Development at the Milford, Utah FORGE Site.

Rick Allis, Joe Moore, Stuart Simmons

EGI, University of Utah, 423 Wakara Way, Ste 300, Salt Lake City, Utah
Utah Geological Survey, PO Box 146100, Salt Lake City

The Milford FORGE site, located 16 km northeast of Milford City, Beaver County, and 350 km south of Salt Lake City, is ideal as an EGS field laboratory. The site covers an area of about 25 km2 and is underlain by large volumes of granite and gneiss at temperatures in the range of 175 – 225°C at 2 to 4 km depth. A deep exploration well, Acord-1, drilled in 1979 to 3.8 km depth 5 km from the proposed drill site, encountered granite and gneiss at 3.1 km depth and a temperature at total depth of 230°C. The well did not produce fluids and its conductive temperature profile indicates the crystalline rocks at depth are impermeable. Several deep wells are situated between the eastern edge of the FORGE drill site and the 36 MWe Roosevelt Hot Springs geothermal system, located about 4 km to the east. Read More

These wells confirm the near-surface presence of granite and gneiss, high temperatures, and poor permeability at depth, and demonstrate the FORGE site is outside any active hydrothermal system. All of the wells have been extensively logged, with data and cuttings available for further analysis. The existing Acord-1 well, which was plugged and suspended, will be entered and cleaned out to provide open-hole access to hot crystalline rocks prior to the drilling of the FORGE wells. Considerable infrastructure is available near the FORGE site, including power and fiber-optic cable for real-time data streaming, a major paved road, airport, graded dirt roads, a rail line, and supportive private landowners. A motel and eating establishments are available in Milford City and in the larger community in Beaver, Utah, located 35 km further away. The project has secured sufficient groundwater for drilling, stimulation, and heat exchange testing. There are no anticipated environmental constraints with the site, which is adjacent to a 306 MW wind farm, a 240 MW solar PV plant under construction, and several large transmission lines.

Geophysical Signatures of the Milford Utah FORGE site

Christian Hardwick, Mark Gwynn, Rick Allis, and Phil Wannamaker

EGI, University of Utah, 423 Wakara Way, Ste 300, Salt Lake City, Utah
Utah Geological Survey, PO Box 146100, Salt Lake City

The Milford FORGE site is situated over Tertiary-Quaternary granitic intrusions that crop out in the Mineral Mountains, and are at 3.1 km depth in the Acord-1 well in the central Milford valley some 10 km west of the mountains. Modeling of the 20 mgal gravity low caused by the basin fill overlying the granite has been carried out using a decreasing density contrast with increasing depth based on Acord-1 geophysical logs. This shows the granite to dip gently down to the west beneath the surficial fan deposits on the western edge of the Mineral Mountains, but this dip increases at about 5 km forming a more localized basin beneath the center of the valley. Read More

At the proposed deep drilling site, the granite is at about 0.5 km depth. A residual, reduced-to-pole aeromagnetic map is featureless near the proposed site due to the burial depth of the relatively magnetic granite. Long wavelength magnetic high anomalies west of the site may be originating from buried Tertiary andesite which occurs in the Acord-1 well immediately on top of the granite, and also outcrops in the Beaver Lake Mountains 10 miles to the west.

Several magnetotelluric soundings close to the site show the basin fill sediments have a resistivity of about 3 ohm-meters due to both their clay content and to the warm geothermal groundwater they host. This indicates that resistivity surveying may be a valuable technique for mapping the characteristics of the basin fill. A 3-D thermal model is being developed for the site using a combination of over 30 thermal gradient wells and 10 deep wells. Most of the shallow wells show thermally conductive gradients which can be converted to heat flows using characteristic thermal conductivities for the basin fill. The heat flow in the Acord-1 well is 120 ± 20 mW/m2, with heat flows derived from the thermal gradient wells increasing eastwards towards the Mineral Mountains. The Roosevelt hydrothermal system, with temperatures of at least 260°C, occurs along the Opal Mound fault adjacent to the Mineral Mountains, and it had a pre-development heat output of 60 – 70 MWth. Re-evaluation of the temperature data suggests anomalously hot granite occurs over an over an area of at least 100 km2 at 4 km depth. This thermal anomaly appears similar in area to seismic velocity and attenuation anomalies deeper in the crust. The stored heat that is potentially accessible in the granite, if technologies for enhancing and creating permeability can be developed, is gigawatts in magnitude.

Comprehensive List of Relevant Publications

References on Roosevelt Hydrothermal System and adjacent Mineral Mountains

Allis, R.G., 2014, Formation pressure as a potential indicator of high stratigraphic permeability: Proceedings, 39th Workshop on Geothermal Reservoir Engineering, Stanford University, 11 p.   https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2014/Allis.pdf

Allis, R.G., Gwynn, M., Hardwick, C., Kirby, S., Moore, J., and Chapman, D., 2015, Re-evaluation of the pre-development thermal regime of Roosevelt Hot Springs geothermal system, Utah: Proceedings, 40th Workshop on Geothermal Reservoir Engineering, Stanford University, 12 p.  http://www.geothermal-energy.org/pdf/IGAstandard/SGW/2015/Allis.pdf

Allis R. G. and Larsen, G., 2012,  Roosevelt Hot Springs Geothermal field, Utah – reservoir response after more than 25 years of power production: Proceedings, 37th Workshop on Geothermal Reservoir Engineering, Stanford University, 8 p.  https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2012/Allis.pdf

Allis, R.G., Moore, J.N., Davatzes, N., Gwynn, M., Hardwick, C., Kirby, S., Pankow, K., Potter, S., and Simmons, S.F., 2016, EGS Concept Testing and Development at the Milford, Utah FORGE Site: Proceedings, 41st Workshop on Geothermal Reservoir Engineering, Stanford University, 13 p.  http://www.geothermal-energy.org/pdf/IGAstandard/SGW/2016/Allis.pdf

Alienikoff, J.N., Nielson, D.L., Hedge, C.E., and Evans, S.H. Jr., Geochronology of Precambrian and Tertiary rocks in the Mineral Mountains, south-central Utah: U.S. Geological Survey Bulletin, 1622, p. 1-12, 1987.  http://pubs.usgs.gov/bul/1622/report.pdf

Anders, M. H., Christie-Blick, N., and Malinverno, A., 2012, Cominco American well: Implications for the reconstruction of the Sevier Orogen and Basin and Range extension in west central Utah. America: Journal of Science, v. 312, p. 508-533.  http://www.ajsonline.org/content/312/5/508

Anders, M. H., Christie-Blick, N., Wills, S., and Krueger, S.W.. 2001, Rock deformation studies in the Mineral Mountains and Sevier Desert of west-central Utah—Implications for upper crustal low-angle normal faulting: Geological Society of America Bulletin, v. 113, no. 7, p. 895-907.  http://gsabulletin.gsapubs.org/content/113/7/895

Arabasz, W., Pechmann J.C., and Burlacu, R., in press, Development of an earthquake catalog and calculation of seismicity rates for the Wasatch Front and surrounding Utah region—Appendix E, in Working Group on Utah Earthquake Probabilities (WGUEP), Earthquake probabilities for the Wasatch Front region—Utah, Idaho, and Wyoming: Utah Geological Survey Miscellaneous Publication 16-3, p. E1-E126.

Atkinson, D.J., 1981, The Roosevelt Field—new model and geochemical evaluation: Geothermal Resources Council Transactions, v. 5, p. 149-152.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000757

Ballantyne, G. H., 1978, Hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah—characterization of rock types and alteration in Getty Oil Company well Utah State 52-21: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 24 p.  http://www.osti.gov/geothermal/biblio/6579521

Ballantyne, J. M., 1978, Hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah—modal mineralogy, and geochemistry of sericite, chlorite, and feldspar from altered rocks, Thermal Power Company well Utah State 14-2: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 42 p.    http://www.osti.gov/geothermal/biblio/5754229

Ballantyne, J. M., 1980, Geochemistry of sericite and chlorite in well 14-2 Roosevelt Hot Springs geothermal system and in mineralized hydrothermal systems: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, 92 p.  http://www.osti.gov/geothermal/biblio/5285752

Ballantyne, J. M. and Parry, W.T., 1978, Technical report 78-1701-a.1.1, hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah—petrographic characterization of the alteration to 2 kilometers depth: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 26 p.  http://digitalcommons.usu.edu/govdocs/275/

Bamford, R.W., 1978, Geochemistry of solid materials from two U.S. geothermal systems and its application to exploration: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for, Utah, U.S. Department of Energy, Division of Geothermal Energy, 196 p.  http://www.osti.gov/geothermal/biblio/6779944

Bamford, R.W., 1980, Multielement geochemistry of solid materials in geothermal systems and its applications—part 1, the hot-water system at the Roosevelt Hot Springs KGRA: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 168 p.  http://www.osti.gov/geothermal/biblio/5197458

Bamford, R.W., Bowman, J.R., Brown, F.H., Cook, K.L., Chapman, D.S., Hohmann, G.W., Nash, W.P., Parry, W.T., Ross, H.P., Sill, W.R., Smith, R.B., Ward, S.H., Whelan, J.A., Wright, P.M., 1977, Geothermal research, Roosevelt Hot Springs KGRA, quarterly progress report, August 1–October 31, 1977: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 30 p.  http://www.osti.gov/geothermal/biblio/896040

Barker, C.A., 1986, Upper-crustal structure of the Milford Valley and Roosevelt Hot Springs, Utah Region—By modeling of seismic refraction and reflection data: Salt Lake City, University of Utah, M.S. thesis.  http://www.worldcat.org/oclc/14865881

Becker D.J., and Blackwell, D, 1983, Gravity and hydrothermal modeling of the Roosevelt Hot Springs area, southwest Utah: Journal of Geophysical Research, v. 98, n. B10, p. 17787-17800.   http://onlinelibrary.wiley.com/doi/10.1029/93JB01231/abstract

Benoit, D., 2013, An empirical injection limitation in fault-hosted Basin and Range geothermal systems: Geothermal Resources Council Transactions, v. 37, p. 887-894.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1030675

Benoit, W.R., and Butler, R.W., 1980, A review of high-temperature geothermal developments in the northern Basin and Range Province: Geothermal Resources Council, Special Report No. 13, p. 57-80.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1005447

Blackett, R.E., 2005, Geothermal Utah, geology, resources and development in the Beehive State: Geothermal Resources Council Bulletin, v. 34, no. 2, p.78‐83.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=7004995

Blackett, R. E., 2007, Review of selected geothermal areas in southwestern Utah: Geothermal Resources Council Transactions, v. 31, p. 111-116.   https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1025203

Blackett, R.E., and Moore, J.N., editors, 1994, Cenozoic geology and geothermal systems of

southwestern Utah: Utah Geological Association Publication 23, 215 p.  http://www.mapstore.utah.gov/uga23.html

Blackett, R.E. and Ross, H.P., 1992, Recent exploration and development of geothermal resources in the Escalante Desert region of southwestern Utah, in Harty, K.M., editor, Engineering geology of southwest Utah: Utah Geological Association Publication 21, p. 261-280.  http://archives.datapages.com/data/uga/data/063/063001/261_ugs630261.htm

Blackwell, D.D. and Chapman, D.S., 1977, Interpretation of geothermal gradient and heat flow data for Basin and Range geothermal systems: Geothermal Resources Council Transactions, v. 1, p. 19-20.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000007

Bowman, J.R., 1979, Topical report—volume 77-10, stable isotope investigation of fluids and water-rock interaction in the Roosevelt Hot Springs thermal area, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 18 p.  http://www.osti.gov/geothermal/biblio/5911506

Bowman, J.R., Brown, F.H., Cook, K.L., Nash, W.P., Parry, W.T., Sill, W.R., Smith, R.B., Ward, S.H., Whelan, J.A., 1976, Geothermal research, Roosevelt Hot Springs KGRA, quarterly progress report, August 1–October 31, 1976: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 26 p.    http://www.osti.gov/geothermal/biblio/5665459

Bowman, J.R., Evans, S.H., Jr., Hohmann, W.P., Nash, W.P., Reynolds, G.R., Sill, W.R., and Ward, S.H., 1980,         Management assistance and technical support for the programs in exploration technology, final report for the period December 1, 1978–February 28, 1980: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 41 p.  http://www.osti.gov/geothermal/biblio/6509015

Bowman, J.R. and Rohrs, D.T., 1981, Light-stable-isotope studies of spring and thermal waters from the Roosevelt Hot Springs and Cove Fort/Sulphurdale Thermal areas and of clay minerals from the Roosevelt Hot Springs thermal area: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 36 p.  http://www.osti.gov/geothermal/biblio/5245145

Brown, F.H., 1977, Technical report—volume 77-1, attempt at paleomagnetic dating of opal, Roosevelt Hot Springs KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 13 p.  http://www.osti.gov/geothermal/biblio/5754238

Brumbaugh, W.D., 1977, Technical report 77-4, gravity survey of the Cove Fort-Sulphurdale KGRA and the north Mineral Mountains area, Millard and Beaver Counties: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 131 p.  http://www.osti.gov/geothermal/biblio/893365

Bruhn, R.L., Yusas, M.R, and Huertas, F., 1982, Technical report volume 77-5, mechanics of low-angle faulting—an example from Roosevelt Hot Springs geothermal area, Utah: Tectonophysics, v. 86, p. 343-361.  http://www.sciencedirect.com/science/article/pii/0040195182901792

Bryant, N. L., and Parry, W.T., 1977, Hydrothermal alteration at Roosevelt Hot Springs KGRA-DDH 1976-1: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 87 p.  http://www.osti.gov/geothermal/biblio/5815782

Buck, W.R., 1989, Flexural rotation of normal faults: Tectonics, v. 7, p. 959-973.  http://ic.ucsc.edu/~casey/eart150/Death%20Valley%20Reading/Buck,1988_Rolling%20Hinge.pdf

Butz, J.R., 1980, A case study of two-phase flow at the Roosevelt Hot Springs, Utah KRGA: Geothermal Resources Council Transactions, v. 4, p. 439-442.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000622

Butz, J. and Plooster, M., 1979, Final report, subsurface investigations at the Roosevelt KGRA, Utah: unpublished report prepared by Denver Research Institute, University of Denver, Denver Colorado, for U.S. Department of Energy, Department of Geothermal Energy, 73 p.  http://www.osti.gov/scitech/biblio/5592994-lPtGQs/

Capuano, R.M., 1978, Initial investigation of soil mercury geochemistry as an aid to drill site selection in geothermal systems: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 32 p.  http://www.osti.gov/scitech/biblio/5778808

Capuano, R.M., and Cole, D.R., 1982, Fluid-mineral equilibria in a hydrothermal system, Roosevelt Hot Springs, Utah: Geochimica et Cosmochemica Acta, v. 46, p. 1353-1364. http://www.sciencedirect.com/science/article/pii/001670378290271X

Carlston, K.J., 1982, Electric field ratio telluric survey of the Roosevelt Hot Springs, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 59 p.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1019328

Carter J.A., and Cook, K.L., 1978, Final report volume 77-11, regional gravity and aeromagnetic surveys of the mineral mountains and vicinity, Millard and Beaver Counties, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 180 p.  http://www.osti.gov/scitech/biblio/5665404

Christensen, O.D., Moore, J.N., and Capuano, R.M., 1980, Trace element geochemical zoning in the Roosevelt Hot Springs thermal area, Utah: Geothermal Resources Council Transactions, v. 4, p. 149-152.  http://pubs.geothermal-library.org/lib/grc/1000549.pdf

Chu, J.J., 1980, Induced polarization data at Roosevelt Hot Springs geothermal area, Utah: Salt Lake City, University of Utah, M.S. thesis.  http://ngds.egi.utah.edu/files/GL04031/GL04031.pdf

Chu, J.J., Sill, W.R., and Ward, S.H., 1979, Induced polarization measurements at Roosevelt Hot Springs thermal area, Utah: Salt Lake City: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 34 p.  http://www.osti.gov/scitech/biblio/6564250

Clement, M.D., 1981, Heat flow and geothermal assessment of the Escalante Desert, southwestern Utah, with emphasis on the Newcastle KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 118 p.  http://www.osti.gov/scitech/biblio/6150551

Cochrane, F., Tosaya, C.A., and Owen, J.L., 1988, Evaluation of a site-specific commercial hot dry rock geothermal power prospect: Geothermal Resources Council Transactions, v. 12, p. 375-382.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1001731

Coleman, D.S., and Walker, J.D, 1992, Evidence for the generation of juvenile granitic crust during continental extension, Mineral Mountains batholith, Utah: Journal of Geophysical Research, v. 97, p. 11011-11024.  http://onlinelibrary.wiley.com/doi/10.1029/92JB00653/abstract

Cook, K.L., 1978, Final report—volume 77-9, precision leveling and gravity studies at Roosevelt Hot Springs KGRA, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 56 p.  http://www.osti.gov/scitech/biblio/5696697

Cook, K.L., 1980, Topical report—detailed gravity and aeromagnetic surveys of the Cove Fort-Sulphurdale KGRA and vicinity, Millard and Beaver Counties, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy.  http://www.osti.gov/scitech/biblio/7044813

Crebs, T.J. and Cook, K.L., 1976, Technical report—gravity and ground magnetic surveys of the central Mineral Mountains, Utah, volume 6, final report: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City.   http://www.osti.gov/scitech/biblio/7211157

Crecraft, H.R., Nash, W.P., and Evans, S.H., Jr., 1980, Topical report, petrology, geochronology, and chemical evolution of the Twin Peaks rhyolite domes, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 200 p.  http://www.osti.gov/scitech/biblio/5285924

Dedolph, R.E. and Parry, W.T., 1976, Technical report, volume 76-2, a thermodynamic model of the hydrolysis of microcline in acid sulfate solutions: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 63 p.  http://www.osti.gov/scitech/biblio/5744970

Dickinson, W.R., 2006, Geotectonic evolution of the Great Basin: Geosphere, v. 2, no. 7, p. 353-368.   http://pyrite.utah.edu/fieldtrips/SEGFnevada2009/Readings/Dickenson.pdf

Earll, F.N., 1957, Geology of the central Mineral Range, Beaver Co., Utah—georeferenced map files: Salt Lake City, University of Utah, Ph.D, dissertation, 112 p.  http://content.lib.utah.edu/cdm/ref/collection/etd3/id/1541

East, J., 1981, Hot dry rock geothermal potential of Roosevelt Hot Springs area—review of data and recommendations: unpublished report prepared by Los Alamos National Laboratory, Los Alamos, New Mexico, for U.S. Department of Energy, Division of Geothermal Energy, 46 p.  http://www.osti.gov/geothermal/biblio/6349353

Evans, S.H., Jr., 1980, Summary of potassium/argon age dating, 1979: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 23 p.  http://www.osti.gov/scitech/biblio/5166169

Evans, S.H., Jr. and Nash, W.P., 1978, Final report—volume 77-10, Quaternary rhyolite from the Mineral Mountains, Utah, U.S.A.: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 59 p.  http://www.osti.gov/scitech/biblio/5696814

Evans, S.H., Jr. and Nash, W.P., 1980, Compositional gradients in natural silicic liquids: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 29 p.  http://www.osti.gov/scitech/biblio/6773738

Evans, S.H., Jr. and Nielson, D.L., 1982, Thermal and tectonic history of the Mineral Mountains intrusive complex: Geothermal Resources Council Transactions, v. 6, p. 15-18.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000906

Faulder, D.D., 1991, Conceptual geologic model and native state model of the Roosevelt Hot Springs hydrothermal system:  Proceedings, 16th Workshop on Geothermal Reservoir Engineering, Stanford University, p. 131-142 1991.  https://pangea.stanford.edu/ERE/pdf/IGAstandard/SGW/1991/Faulder.pdf

Faulder, D.D., 1994, Long term flow test no. 1, Roosevelt Hot Springs: Geothermal Resources Council Transactions, v. 18, p. 583-590.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1007044

Forrest, R.J., 1980, Historical synopsis of the Roosevelt Hot Springs geothermal field, Utah, in Nielson, D.L., editor, Geothermal systems in central Utah, guidebook to field trip number 7, Geothermal Resources Council annual meeting, p. 18-24.

Forrest, R.J., 1994, Geothermal development at Roosevelt Hot Springs geothermal area, Beaver County, Utah, 1972-1993, in Blackett, R.E., and Moore, J.N., editors, Cenozoic geology and geothermal systems of southwest Utah: Utah Geological Association Publication 23, p. 37-44. 1993.  http://archives.datapages.com/data/uga/data/065/065001/37_ugs650037.htm

Frangos, W. and Ward, S.H., 1980, Bipole-dipole survey at Roosevelt Hot Springs thermal area, Beaver County, Utah: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 51 p.  http://www.osti.gov/scitech/biblio/5050398

Gertson, R.C. and Smith, R.B., 1979, Interpretation of a seismic refraction profile across the Roosevelt Hot Springs, Utah and vicinity: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 120 p.  http://www.osti.gov/scitech/biblio/5814637

Giggenbach, W.F., and Stewart, M.K., 1982, Processes controlling the isotopic compositions of steam and water discharges from steam vents and steam-heated pools in geothermal areas: Geothermics, v. 11, p. 71-80.  https://www.researchgate.net/publication/248522678

Glenn, W.E. and Hulen, J.B., 1979, Interpretation of well log data from four drill holes at Roosevelt Hot Springs KGRA: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 74 p.  http://www.osti.gov/scitech/biblio/5597946

Glenn, W.E.. Hullen, J.B., and Nielson, D.L., 1980, A comprehensive study of LASL well C/T-2, Roosevelt Hot Springs KGRA, Utah, and applications to geothermal well logging: unpublished report prepared by Los Alamos National Laboratory, Los Alamos, New Mexico, for U.S. Department of Energy, Division of Geothermal Energy, 176 p.  http://www.osti.gov/scitech/biblio/6600607

Goff F. and Decker, E.R., 1983, Candidate sites for future hot dry rock development in the United States: Journal of Volcanology and Geothermal Research, v. 15, p. 187-221.  http://www.sciencedirect.com/science/article/pii/0377027383901002

Gwynn, M., Allis, R., Hardwick C.L., Hill, J., and Moore, J., 2016, A New Look at the Thermal Regime Around Roosevelt Hot Spring, Utah: Proceedings, 41st Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA. http://www.forgeutah.com/wp-content/uploads/2017/02/Gwynn-et-al.-2016-GRC-RHS.pdf

Halliday, M.E. and Cook, K.L., 1978, Final report—volume 77-7, gravity and ground magnetic surveys in the Monroe and Joseph KGRA’s and surrounding region, south central Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 164 p. http://www.osti.gov/scitech/biblio/5754069

Hardwick C.L., Gwynn, M., Allis, R., Wannamaker, P., and Moore, J., 2016, Geophysical signatures of the Milford, Utah FORGE site: Proceedings, 41st Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA.  http://www.geothermal-energy.org/pdf/IGAstandard/SGW/2016/Hardwick.pdf

Hintze, L.F. and Davis, F.D., 2003, Geology of Millard County, Utah: Utah Geological Survey Bulletin 133, 305 p.  http://ugspub.nr.utah.gov/publications/bulletins/B-133.pdf

Hintze, L.H., Davis, F.D., Rowley, P.D., Cunningham, C.G., Steven, T.A., and Willis, G.C., 2003, Geologic map of the Richfield 30′ x 60′ quadrangle, southeast Millard County, and parts of Beaver, Piute, and Sevier Counties, Utah: Utah Geological Survey Map 195.  http://ugspub.nr.utah.gov/publications/geologicmaps/30x60quadrangles/M-195Richfield.pdf

Hirtz, P. and Lovekin, J., 1995, Tracer dilution measurements for two-phase geothermal production—comparative testing and operating experience: Geothermal Resources Council Transactions, v. 19, p. 563-568.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1010748

Hohmann, G.W. and Ting, S.C., 1978, Three dimensional magnetotelluric modeling: unpublished report prepared by Earth Science Laboratory University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 48 p.  http://ngds.egi.utah.edu/files/GL01154/GL01154.pdf

Hulen, J.B., 1978, Stratigraphy and alteration, 15 shallow thermal gradient holes, Roosevelt Hot Springs KGRA and vicinity, Millard and Beaver Counties, Utah: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 59 p.  http://www.osti.gov/scitech/biblio/5598309

James, L.P. and Bamford, R.W., 1977, Final report—volume 77-1, an evaluation of AIRTRACE in the geothermal environment: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, various pagination.  http://ngds.egi.utah.edu/files/GL01138/GL01138.pdf

Johnson, E.H., 1975, Resistivity and induced polarization survey of a basalt flow in a geothermal environment, western Utah: Salt Lake City, University of Utah, M.S. thesis, 16 p.  http://content.lib.utah.edu/cdm/ref/collection/etd2/id/2260

Katz, L., undated, Seismic emissions study, Roosevelt Hot Springs, Milford, Utah: unpublished report prepared by Seismic Exploration Inc., Salt Lake City, Utah for Getty Oil Company, 7 p.  http://ngds.egi.utah.edu/files/GL04417/GL04417.pdf

Kerna, M.J. and Allen, T.S., 1984, Roosevelt Hot Springs development, Geothermal Resources Council Transactions, v. 8, p. 75-77.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1001153

Kennedy, B.M. and van Soest, M.C., 2006, A systematic regional trend in helium isotopes across

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Kirby, S., 2012, Geologic and hydrologic characterization of regional nongeothermal groundwater resources in the Cove Fort area, Millard and Beaver Counties, Utah: Utah Geological Survey Special Study, 140, 46 p.  http://ugspub.nr.utah.gov/publications/special_studies/ss-140.pdf

Klusman, R.W. and LeRoy, M.P., 1996, Potential for use of gas flux measurements in surface exploration for geothermal resources: Geothermal Resources Council Transactions, v. 20, p. 331-338.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1014753

Koenig, J.B., and Gasrdner, M.C., 1977, Geothermal potential of the lands leased by Geothermal Power Corporation in the northern Mineral Mountains, Beaver and Millard Counties, Utah: open file report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 43 p.  http://www.osti.gov/scitech/biblio/5045454

Koenig, J.B., and Gasrdner, M.C., 1982, Geothermal reservoir assessment, Roosevelt Hot Springs, final report, October 1, 1977 – June 30 1982: open file report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 81 p.  http://www.osti.gov/scitech/biblio/5045454

Lee, W., 1908, Water resources of the Beaver Valley: U.S. Geological Survey Water Supply Paper 217, 57 p.  https://pubs.er.usgs.gov/publication/wsp217

Lenzer, R.C., Crosby, G.W., and Berge, C.W., 1976, Geothermal exploration of Roosevelt KGRA, Utah: conference paper, 17th U.S. Symposium on Rock Mechanics, American Rock Mechanics Association,      2 p.  https://www.onepetro.org/conference-paper/ARMA-76-0283

Lenzer, R.C., Crosby, G.W., and Berge, C.W., 1977, Recent developments at the Roosevelt Hot Springs, KGRA: Transactions American Nuclear Society Topical Meeting, Golden, Colorado, April 12-14.  http://ngds.egi.utah.edu/files/GL01615/GL01615_1.pdf

Lin, Y.T., 1981, The impact of bit performance on geothermal well cost: Geothermal Resources Council Transactions, v. 5, p. 253-256.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000784

Lipman, P.W., Rowley, P.D., Mehnert, H.H., Evans S.H., Jr., Nash, W.P., and Brown F.H., 1978, Pleistocene rhyolite of the Mineral Mountains, Utah—geothermal and archeological significance: Journal Research U.S. Geological Survey, v. 6, p. 133-147.  https://www.researchgate.net/publication/236393864_Pleistocene_rhyolite_of_the_Mineral_Mountains_Utah-Geothermal_and_archeological_significance

Lynch, W.C. and Nash, W.P., 1980, Chemical trends in the Ice Springs basalt, Black Rock Desert, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 86 p.  http://www.osti.gov/scitech/biblio/5209691-rUJP7f/

Lynne, B.Y., Campbell, K.A., Moore, J.N., and Browne, P.R.L., 2004, Siliceous sinter diagenesis at the Opal Mound Roosevelt Hot Springs, Utah, USA: Proceedings, 26th NZ Geothermal Workshop, p. 12-17.  http://www.geothermal-energy.org/pdf/IGAstandard/NZGW/2004/Lynne_et_al.pdf

Lynne, B.Y., Campbell, K.A., Moore, J.N., and Browne, P.R.L., 2005, Diagenesis of 1900 year-old siliceous sinter (opal-A to quartz) at Opal Mound, Roosevelt Hot Springs, Utah: Sedimentary Geology, v. 179, p. 249-278.  http://www.sciencedirect.com/science/article/pii/S0037073805002162

Mabey, D.R., and Budding, K.E., 1987, High temperature geothermal resources of Utah: Utah Geological and Mineralogical Survey Bulletin, 123, 64 p.   http://ugspub.nr.utah.gov/publications/bulletins/B-123.pdf

McKinney, D.B., 1978, Annotated bibliography of the geology of the Roosevelt Hot Springs known geothermal resource area and the adjacent Mineral Mountains, March 1978: Salt Lake City: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 15 p.  http://www.osti.gov/scitech/biblio/5514935

Micro Geophysics, 1977, Final report 77-4, refraction shooting near Roosevelt Hot Springs—Data. Salt Lake City: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 56 p.  http://ngds.egi.utah.edu/files/GL01141/GL01141.pdf

Miller, C.D., 1976, Alteration and geochemistry of the Monroe known geothermal resource area: Salt Lake City, University of Utah, M.S. thesis, 120 p.  http://www.worldcat.org/oclc/2600671

Moore J.N. and Nielson, D.L., 1994, An overview of the geology and geochemistry of the Roosevelt Hot Springs geothermal system, Utah: Utah Geological Association Publication 23, p. 25-36.  http://archives.datapages.com/data/uga/data/065/065001/25_ugs650025.htm

Mower, R.W., 1978, Hydrology of the Beaver Valley area, Beaver County, Utah, with emphasis on ground water: Utah Department of Natural Resources Technical Publication 63, 90 p.  http://www.waterrights.utah.gov/cgi-bin/docview.exe?Folder=TP20-5-530&Title=Technical+Publication+63

Mower, R.W., and Cordova, R.M., 1974, Water resources of the Milford area, Utah, with an emphasis on ground water: Utah Department of Natural Resources Technical Publication 43, 106 p.  http://www.waterrights.utah.gov/cgi-bin/libview.exe?Modinfo=Viewpub&LIBNUM=20-5-140

Mundorf, J.C., 1970, Major thermal springs of Utah: Utah Geological and Mineral Survey, Water Resources Bulletin 13, 60 p.  http://ugspub.nr.utah.gov/publications/water_resources_bulletins/WRB-13.pdf

Nash, W.P., 1976, Final report—volume 1, petrology of the Quaternary volcanics of the Roosevelt KGRA and adjoining area, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 114 p.  http://www.osti.gov/scitech/biblio/7308985-uWl9gW/

Nash, W.P., 1982, Evolution of the Quaternary magmatic system, Mineral Mountains, Utah—interpretations from chemical and experimental modeling: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 50 p.  http://www.osti.gov/scitech/biblio/893697

Nash, W.P., Crecraft, H.R., Evans S.H., Jr., 1980, Volcanism of the Black Rock Desert and Twin Peaks areas, west-central Utah, in Nielson, D.L., editor, Geothermal systems in central Utah, guidebook to field trip number 7, Geothermal Resources Council annual meeting. http://ngds.egi.utah.edu/files/GL04060/GL04060.pdf

Nash, W.P. and Evans, S.H., Jr., 1978, Final report—volume 77-13, fluid dynamic properties of rhyolitic magmas, Mineral Mountains, Utah, part I—volatile content and flow characteristics, part II—physical properties: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 45 p.  http://www.osti.gov/scitech/biblio/890953

Nielson, D.L., 1978, Radon emanometry as a geothermal exploration technique—theory and an example from Roosevelt Hot Springs KGRA, Utah: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 31 p.  http://www.osti.gov/scitech/biblio/5815672

Nielson, D.L., 1989, Stress in geothermal systems: Geothermal Resources Council Transactions, v. 13, p. 271-276.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1001789

Nielson D. L., Evans, S.H., Jr., Sibbett, D.S., 1986, Magmatic, structural, and hydrothermal evolution of the Mineral Mountains intrusive complex, Utah: Geological Society of America Bulletin, v. 97, no. 6, p. 765-777.  http://gsabulletin.gsapubs.org/content/97/6/765.short

Nielson, D.L., and Moore, J.N., 1979, The exploration significance of low-angle faults in the Roosevelt Hot Springs and Cove Fort-Sulphurdale geothermal systems, Utah: Geothermal Resources Council Transactions, v. 3, P. 503-506.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000431

Nielson, D.L., Sibbett, B.S., and McKinney, D.B., 1979, Geology and structural control of the geothermal system at Roosevelt Hot Springs, Beaver County, Utah [abs.]: AAPG Bulletin, v. 63, p. 836. http://archives.datapages.com/data/bulletns/1977-79/images/pg/00630005/0800/08360.pdf

Nielson, D.L., Sibbett, B.S., McKinney, D.B., Hulen J.B., Moore, J.N., and Samberg, S.M., 1978, Geology of Roosevelt Hot Springs KGRA, Beaver County, Utah: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 120 p.  http://www.osti.gov/scitech/biblio/5696785

Olson, T.L., and Smith, R.B., 1976, Earthquake surveys of the Roosevelt Hot Springs and the Cove Fort areas, Utah, final report—volume 4: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for National Science Foundation, 83 p.  http://www.osti.gov/scitech/biblio/7289667

Pankow, K.L., Arabasz, W.J., Nava, S.J., and Pechmann, J.C., 2004, Triggered seismicity in Utah from the 3 November 2002 Denali fault earthquake: Bull. Seism. Soc. Am. V. 94, no. 6B, p. S332–S347.   http://www.bssaonline.org/content/94/6B/S332.abstract

Parry, W.T., Ballantyne, J.M., Bryant, N.L., and Dedolph, R.E., 1980, Geochemistry of hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah: Geochimica et Cosmochimica Acta, v. 44, iss. 1, p. 95-102.  http://www.sciencedirect.com/science/article/pii/0016703780901799

Parry, W.T., Ballentyne, J.M., and Jacobs, D.C., 1980, Geochemistry of hydrothermal sericite from Roosevelt Hot Springs and the Tintic and Santa Rita porphyry copper systems: Economic Geology, v. 79, no. 1, p. 72-86.  http://economicgeology.org/content/79/1/72.short

Parry, W.T., Benson, N.L., Miller, C.D., 1976, Final report—volume 3 revised, geochemistry and hydrothermal alteration at selected Utah hot springs: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for National Science Foundation, 131 p.  http://www.osti.gov/scitech/biblio/5026993

Parry, W.T., Bryant, N.L., Dedolph, R.E., Ballantyne, J.M., Ballantyne, G.H., Rohrs, D.T., and Mason J.L., 1978, Final Report, hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 29 p.  http://www.osti.gov/scitech/biblio/6564287

Parry, W.T., and Cleary, M., 1978, Final report, volume 78-1, Na-K-Ca and SiO₂ temperature estimates for Utah spring and well waters: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Geological Survey, Geothermal Research Program, 51 p.  http://search.geothermaldata.org/dataset/na-k-ca-and-sio2-temperature-estimates-for-utah-spring-and-well-waters

Parry, W.T., Ward, S.H., Nash, W.P., and others, 1977, Final report—volume 77-2, part I—geology and geochemistry of the Roosevelt Hot Springs—a summary, part II—geophysics of the Roosevelt Hot Springes thermal area, Utah, part III—Roosevelt Hot Springs area field trip: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, various pagination.  http://www.osti.gov/scitech/biblio/893367/

Pelton, W. H., 1977, Interpretation of induced polarization and resistivity data: Salt Lake City, University of Utah, Department of Geology and Geophysics, Ph.D. dissertation, 255 p.  http://www.worldcat.org/oclc/2972563

Petersen, C.A., 1975, Geology and geothermal potential of the Roosevelt Hot Springs area, Beaver County, Utah: Salt Lake City, University of Utah, Department of Geology and Geophysics, M.S. dissertation, 50 p.  http://content.lib.utah.edu/cdm/ref/collection/etd3/id/302

Petrick, W.R., Jr.,1974, Technical report 74-1, test electromagnetic soundings, Roosevelt Hot Springs KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for National Science Foundation, 18p.  http://www.osti.gov/scitech/biblio/7320342

Petrick, W.R., Jr., Sill, W.R., and Ward, S.H., 1979, Three-dimensional resistivity inversion using alpha centers: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 64 p.  http://www.osti.gov/scitech/servlets/purl/6809531/

Robinson R. and Iyer, H.M., 1981, Delineation of a low-velocity body under the Roosevelt Hot Springs geothermal area, Utah, using teleseismic P-wave data: Geophysics, v. 46, iss. 10, p. 1456-1466.  http://library.seg.org/doi/abs/10.1190/1.1441152

Rohrs, D.T. and Bowman, J.R., 1980, A light stable isotope study of the Roosevelt Hot Springs thermal area, southwestern Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, 89 p.  http://www.osti.gov/scitech/biblio/5285736

Roxlo, K.S., 1980, Uranium geochemistry of the Roosevelt Hot Springs thermal area, Utah: Salt Lake City, University of Utah, M.S. thesis, 62 p.  http://www.worldcat.org/oclc/6248087

Ross, H.P., Nielson, D.L. and Moore, J.N., 1982, Roosevelt Hot Springs geothermal system, Utah—case study: AAPG Bulletin, v. 66, iss. 7, p. 879-902.  http://archives.datapages.com/data/bulletns/1982-83/data/pg/0066/0007/0850/0879.htm

Rowley, P.D., Vice, G.E., McDonald, R.E., Anderson, J.J., Machette, M.N., Maxwell, D.J., Ekren, E.B., Cunningham, C.G., Steven, T.A., and Wardlaw, B., 2005, Interim geologic map of the Beaver 30′ x 60′  quadrangle, Beaver, Piute, Iron, and Garfield Counties, Utah: Utah Geological Survey Open-File Report 454, 27 p.,1 plate, scale 1:100,000.  http://ugspub.nr.utah.gov/publications/open_file_reports/OFR-454_Beaver.pdf

Rudisill, J.M., 1978, A case history the completion of a shallow, over-pressured geothermal well: Geothermal Resources Council Transactions, v. 2, p. 587-590.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000264

Sandberg, S.K., and Hohmann, G.W., 1980, Controlled-source audiomagnetotellurics in geothermal exploration: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 85 p.  http://www.osti.gov/scitech/biblio/6749290-r1BMPL/

Sawyer, R.F. and Cook, K.L.,1977, Gravity and ground magnetic surveys of the Thermo Hot Springs KGRA Region, Beaver County, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 142 p.  http://www.osti.gov/scitech/biblio/895548

Serpa, L.F. and Cook, K.L., 1980, Detailed gravity and aeromagnetic surveys in the Black Rock Desert Area, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 210 p.  http://www.osti.gov/scitech/biblio/6773977

Shannon, S. S., Jr., Goff, F., Rowley, J.C., Pettit, R.A., and Vuataz, F.D., 1983, Roosevelt Hot Springs/hot dry rock prospect and evaluation of the Acord 1-26 well: Geothermal Resources Council Transactions, v. 7, p. 541-544.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1001123

Sibbett, B.S., and Nielson, D.L., 1980, Geology of the central Mineral Mountains, Beaver County, Utah: Salt Lake City, Earth Science Laboratory University of Utah Research Institute, Report 33, 42 p.  http://www.osti.gov/scitech/biblio/5040670

Sill, W.R. and Bodell, J., 1977, Thermal gradients and heat flow at Roosevelt Hot Springs: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 46 p.  http://www.osti.gov/scitech/biblio/5696712

Sill, W.R. and Johng, D.S., 1979, Self-potential survey, Roosevelt Hot Springs, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 19 p.  http://www.osti.gov/scitech/biblio/6623737

Sill, W.R. and Ward, S.H., 1978, Electrical energizing of well casings: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 5 p.  http://www.osti.gov/scitech/biblio/6771882

Simmons, S., Kirby, S., Jones, C., Moore, J., and Allis, R., 2016, The geology, geochemistry, and hydrology of the EGS FORGE site, Milford Utah: Proceedings, 41st Workshop on Geothermal Reservoir Engineering, Stanford University, 10 p.  http://www.geothermal-energy.org/pdf/IGAstandard/SGW/2016/Simmons2.pdf

Smith, L., 1980, A model study of the regional hydrogeologic regime, Roosevelt Hot Springs, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 30 p.  http://www.osti.gov/scitech/biblio/5231822

Smith, R.B., 1977, Long-term seismic monitoring of the Roosevelt – Cove Fort KGRA’s: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 3 p.  http://www.osti.gov/scitech/biblio/893368

Smith, R.B., and Arabasz, W.J., 1991, Seismicity of the Intermountain Seismic Belt, in Slemmons, D. B.,

Engdahl, E.R., Zoback, M.D., Zoback, M.L., and Blackwell, D., eds., Neotectonics of North America: Geological Society of America, Decade Map Volume 1, p. 185-228.  https://rock.geosociety.org/Store/detail.aspx?id=DNAGCSMS7

Smith, R.B., and Bruhn, R.L., 1984, Intraplate extensional tectonics of the eastern Basin and Range: Inferences on structural style from seismic reflection data, regional tectonics, and thermal-mechanical models of brittle-ductile deformation: Journal of Geophysical Research, v. 9, p. 5733-5762.  http://onlinelibrary.wiley.com/doi/10.1029/JB089iB07p05733/full

Stodt, J.A., Hohmann, G.W., and Ting, S.C., 1981, The telluric-magnetotelluric method in two- and three- dimensional environments: Geophysics, v. 46, no. 8, p. 1137-1147.  http://ngds.egi.utah.edu/files/GL04094/GL04094.pdf

Sweeney, M.J., 1980, McCulloch, Acord 1-26 test well, Roosevelt Hot Springs Area, Beaver County, Utah: unpublished petrography.  (NOTE: From link search on Well Name- Acord. Report is listed as first Log Type- OTHER.)  http://oilgas.ogm.utah.gov/Data_Center/LiveData_Search/scan_data_lookup.cfm

Thangsuphanich, I., 1976, Regional gravity survey of the southern Mineral Mountains, Beaver County, Utah: Salt Lake City, University of Utah, Department of Geology and Geophysics, M.S. thesis, 38 p.  http://www.worldcat.org/oclc/2212382

Ting, S.C., and Hohmann, G.W., 1979, Integral equation modeling of three-dimensional magnetotelluric response: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 33 p.  http://www.osti.gov/scitech/biblio/6718866

Tosaya, C., Findikakis, A., Cochrane, F., and Nicholson, R.,1988, Preliminary reservoir design and screening for a commercial hot dry rock geothermal prospect:  Geothermal Resources Council Transactions, v. 12, p. 485-490.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1001750

Tripp, A.C., Ross, H.P., Stodt, J.A., and Wright, P.M., 1989. Surface-to-borehole electromagnetic experiment at Roosevelt Hot Springs-a feasibility study: Geothermal Resources Council Transactions, v. 13, p. 289-293.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1001791

University of Utah, Geology and Geophysics Department, and United States Geological Survey, 1977, Workshop on electrical methods in geothermal exploration: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 177 p.  http://www.osti.gov/scitech/biblio/892808

Utah Division of Oil, Gas and Mining, 1979, Various logs for McCulloch, Acord 1-26 test well, API well no. 43-001-30009, Roosevelt Hot Springs Area, Beaver County, Utah: unpublished logs archived by Utah Division of Oil, Gas and Mining.  (NOTE: From link search on Well Name- Acord.)  http://oilgas.ogm.utah.gov/Data_Center/LiveData_Search/scan_data_lookup.cfm

Vuataz, F.D. and Goff, F., 1987, Water geochemistry and hydrogeology of the shallow aquifer at Roosevelt Hot Springs, southern Utah: Los Alamos National Laboratory Report, LA-11160-HDR, 61 p.  http://www.osti.gov/scitech/biblio/5292912/

Wannamaker, P.E., 1978, Magnetotelluric investigations at the Roosevelt Hot Springs KGRA and Mineral Mountains, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 54 p.  http://www.osti.gov/scitech/biblio/6766105

Wannamaker, P.E., Bartley, J.M., Sheehan, A.F., Jones, C.H., Lowry, A.R., Dumitru, T.A., Ehlers, T.A., Holbrook, W.S., Farmer, G.L., Unsworth, M.J., Hall, D.B., Chapman, D.S., Okaya, D.A., John, B.E., and Wolfe, J.A., 2001, Great Basin-Colorado Plateau transition in central Utah—an interface between active extension and stable interior: Utah Geological Association Publication 30, p. 1–38.  http://www.utahgeology.org/uga30Titles.htm

Wannamaker, P.E., Hohmann, G.W., Ward, S.H., 1982, Magnetotelluric responses of three-dimensional bodies in layered earths: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 83 p.  http://www.osti.gov/geothermal/biblio/893412

Wannamaker, P.E., Moore, J. N., Pankow, K. L., Simmons, S.F., Nash, G. D., Maris, V., Batchelor, C., and Hardwick, C. L., 2015, Play fairway analysis of the eastern Great Basin extensional regime, Utah, preliminary indications: Proceedings of the Geothermal Resources Council, v. 39, p. 793-804.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1032220

Wannamaker, P.M., Sill, W.R., and Ward, S.H., 1978, Magnetotelluric observations at the Roosevelt Hot Springs KRGA and Mineral Mountains, Utah: Geothermal Resources Council Transactions, v. 2, p. 697-700.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000292

Wannamaker, P.E, Ward, S.H., Hohmann, G.W., and Sill, W.R., 1980, Magnetotelluric models of the Roosevelt Hot Springs thermal area, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 213 p.  http://www.osti.gov/geothermal/biblio/6870224-bNJq50/

Ward, S.H., 1980, Induced seismicity and seismic baseline studies at Roosevelt Hot Springs and Cove Fort/Sulphurdale, Utah : Final report for period September 15, 1978 – March 31, 1980: Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 29 p.  http://www.worldcat.org/oclc/441497507

Ward, S.H. and Crebs, T.J., 1975, Report on preliminary resistivity survey, Roosevelt Hot Springs KRGA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 5 p.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1019327

Ward, S.H., Parry, W.T., Nash, W.P., Sill, W.R., Cook, K.L., Smith, R.B., Chapman, D.S., Brown, F.H., Whelan, J.A., and Bowman, J.R., 1978, A summary of the geology, geochemistry, and geophysics of the Roosevelt Hot Springs thermal area, Utah: Geophysics, v. 43, p. 1515-1542.  http://library.seg.org/doi/abs/10.1190/1.1440912

Ward, S.H., Ross, H.P., and Nielson, D.L., 1979, A strategy of exploration for high-temperature hydrothermal systems in the Basin and Range province: unpublished report prepared by Earth Science Laboratory University of Utah Research Institute, Salt Lake City, Utah, 42 p.

http://www.osti.gov/scitech/servlets/purl/5598270-YVvDYb/

Ward, S.H. and Sill, W.R., 1976, Dipole-dipole resistivity delineation of the near surface zone at the Roosevelt Hot Springs KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 6 p.  http://www.osti.gov/scitech/biblio/6081571

Ward, S.H. and Sill, W.R., 1976, Dipole-dipole resistivity surveys, Roosevelt Hot Springs KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 29 p.  http://www.osti.gov/scitech/biblio/7255740

Wechsler, D.J., and Smith, R.B., 1979, An evaluation of hypocenter location techniques with applications to southern Utah, regional earthquake distributions and seismicity of geothermal areas: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 131 p.  http://www.osti.gov/scitech/biblio/6579471

Welsh, J.E., 1980, McCulloch, Acord 1-26 test well, Roosevelt Hot Springs Area, Beaver County, Utah: unpublished petrography.  (NOTE: From link search on Well Name- Acord. Report is listed as second Log Type- OTHER.)  http://oilgas.ogm.utah.gov/Data_Center/LiveData_Search/scan_data_lookup.cfm.

Whelan, J.A., 1977, Thermal gradient and heat flow drilling by Department of Geology and Geophysics, University of Utah, Summer 1975: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 46 p. http://digitallib.oit.edu/cdm/ref/collection/geoheat/id/1108

Whidden, K.M., and Pankow, K.L., 1994, A catalog of regional moment tensors in Utah from 1998 to 2011: Seismological Research Letters, v. 83, p. 775–783.   http://quake.utah.edu/wp-content/uploads/Whidden_Pankow_20121.pdf

Wilson, W.R., 1980, Thermal studies in a geothermal area: Salt Lake City, University of Utah, Department of Geology and Geophysics, Ph.D. dissertation, 145 p.   http://www.worldcat.org/oclc/7033941

Wilson, W.R, 1980, Three topical reports : thermal studies in a geothermal area: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 102 p.  http://www.osti.gov/scitech/biblio/7015581

Wilson, W.R., and Chapman, D.S., 1980, Thermal studies at Roosevelt Hot Springs, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 102 p. http://www.osti.gov/scitech/biblio/7015581

Wright, P.M., Ruth, K.A., Langton, D.R., and Bullett, M.J., 1990, Publications and geothermal sample library facilities of the Earth Science Laboratory, University of Utah Research Institute, Rev 2.0: unpublished report by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah for U.S. Department of Energy, various pagination.  http://www.osti.gov/scitech/servlets/purl/890978-Brm7HP/

Yearsley, E., 1994, Roosevelt Hot Springs reservoir model applied to forecasting remaining field potential: Geothermal Resources Council Transactions, v. 18, p. 617-622.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1007049

Yusas, M.R., 1979, Structural evolution of the Roosevelt Hot Springs Geothermal Reservoir: Salt Lake City, University of Utah, M.S. thesis, 120 p. http://www.worldcat.org/oclc/5778529

Yusas, M.R. and Bruhn, R.L., 1979, Structural fabric and in-situ stress analyses of the Roosevelt Hot Springs KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 62 p.   http://www.osti.gov/geothermal/biblio/6852810

Zandt, G., McPherson, L., Schaff, S., and Olsen, S., 1982, Final technical report—seismic baseline and induction studies, Roosevelt Hot Springs, Utah and Raft River, Idaho: unpublished report by Earth Science Laboratory University of Utah Research Institute, Salt Lake City, Utah for U.S. Department of Energy, 58 p.  http://www.osti.gov/geothermal/biblio/6396329