History
Due to the desolate nature of the Hot Springs Mountains, the history of the area has been dominated by a series of people passing through, or by people searching for and attempting to produce a wide variety of mineral resources. Although there is a lack of known archaeological sites and artifacts in the Hot Springs Mountains, Indians probably visited nearby Brady's Hot Springs regularly. Early explorers visited Brady's Hot Springs but rapidly moved on in search of more productive land. The...
Shallow Temperaturegradient Holes
After a seven-year hiatus, geothermal exploration in the Brady's area resumed in 1973. The U. S. Geological Survey and the U. S. Bureau of Reclamation drilled 21 FIGURE 6. Three of Brady's geothermal wells flowing photo from Garside, 1974 . shallow test holes to determine shallow subsurface temperatures and temperature gradients and to evaluate the movement of ground water Olmsted and others, 1975 . Most of these drill holes hereafter referred to as holes are located within 1 mile of Brady's...
Geologic Structure And The Geothermal Reservoir
Post-discovery geologic mapping in the northern part of the Hot Springs Mountains shows that the area underlain by the Desert Peak geothermal field is structurally higher than other parts of the northern Hot Springs Mountains. Most of the surface in this area is covered by alluvium, but where bedrock is exposed it consists mostly of rocks of the lower Chloropagus Formation or of units of the unnamed rhyolite sequence. The subsurface temperature distribution is areally nonlinear based on present...
Magnetotelluric Survey
Magnetotelluric MT surveys are unique among electrical surveys since they can provide resistivity data from depths up to several tens of miles. Consequently, numerous magnetotelluric surveys have been run in geothermal exploration and research. The method is expensive and data handling and interpretation are complex. If additional information is desired on the magnetotelluric method the reader is referred to Pdlmason 1975 for a brief description and to Vozoff 1972 for a more thorough treatment....
Introduction Purpose And Scope
In November 1976 Phillips Petroleum Company culminated a three-year exploration effort by drilling a geothermal discovery well near Desert Peak, in northwestern Churchill County, Nevada. This discovery, the Desert Peak geothermal field, has since been proven by the drilling of two more deep test wells. As the geothermal field has a notable lack of surface thermal manifestations, the Desert Peak geothermal field is the first blind geothermal discovery in the Basin and Range physiographic...
Info Bjx
A temperature of 96.3 was reached at 105 ft in hole no. USGS-2. A temperature of 96.3 was reached at 105 ft in hole no. USGS-2. Albers, J. P. 1964 Tertiary and Quaternary rocks, in Mineral and water resources of Nevada Nevada Bureau of Mines and Geology Bulletin 65, 314 p. Axelrod, D. I. 1956 Mio-Pliocene floras from west-central Nevada University of California Publication in Geologic Science, v. 33, p. 1-322. Bailey, E. H., and Phoenix, D. A. 1944 Quicksilver deposits in Nevada Nevada...
Stratigraphic Test No 1
Strat. test no. 1 is located near shallow temperature-gradient hole no. 37 principally because hole no. 37 had such a high bottom-hole temperature and thermal gradient. Hopefully, the 64 F 100 foot gradient would continue to a depth of 500 or 600 feet and possibly would give the base temperature of the geothermal system. There was also some meager geological and geophysical evidence ground magnetics, gravity, and heat flow that a northwest-southeast trending structure was located near strat....
Info Eqo
metamorphosed impure quartzite with irregular chlorite crystals chlorite schist and hornfels this unit appears to be contact metamorphosed phyllite with some interbedded mica schist and impure quartzite or argiflite chlorite schist and hornfels this unit has been intruded by 4 granite dikes. The first granite is present at 5730 feet. Chips of biotite schist are abundant granite, very low in mafic minerals composed of feldspar, quartz, and biotite altered to chlorite chlorite schist and hornfels...
Chloropagus Formation
A series of andesitic to basaltic flows, agglomerates, and tuff-breccias with minor intercalations of water-laid tuffs and shales was named the Chloropagus Formation Axelrod, 1956 for exposures at Green Hill in the northern part of the Hot Springs Mountains. Outcrops of this formation are excellent in the western foothills of the mountains and also in isolated areas southwest of Cinnabar Hill. The Chloropagus Formation consists chiefly of dark-brown, black, green, and reddish vesicular basalt...
Roving Dipole Electrical Resistivity Survey
During the latter stages of the shallow temperature-gradient program a roving dipole resistivity reconnaissance survey was run over the entire thermal anomaly by an independent contractor. In addition, ten depth soundings were made to provide more detailed information on lateral and vertical resistivity variations. Two plates from this survey are included as plates 4 and 5, an apparent resistivity anomaly map and a total-field apparent conductance map. There were six dipole source locations...
Truckee Formation
The Truckee Formation is composed of fluvial and lacustrine sediments and associated volcanic rocks. It is well exposed on the northern and western margins of the Hot Springs Mountains but is absent in the interior portions due to erosion. Axelrod 1956 divided the formation into three members. The lower member consists of basaltic tuff palagonite tuff gray, mollusc-rich, sandy coquina limestone water-laid ash tuff breccia sandstone diatomaceous shale and basalt. The middle member is...
Contents
Purpose and Scope 3 Location and Physical Features 3 History 4 Previous Work 6 Regional Geology 6 Geothermal Exploration Prior to 1973 7 Shallow Temperature-Gradient Holes 12 Roving Dipole Electrical Resistivity Survey 14 Desert Peak Well 29-1 15 Desert Peak Stratigraphie Tests One Through Five 20 Stratigraphie Test No. 1 21 Stratigraphie Test No. 2 21 Stratigraphie Test No. 3 23 Stratigraphie Test No. 4 24 Stratigraphie Test No. 5 24 Temperature Cross Section A-A' 25 Desert Peak Well B21-1 29...