The results of a geothermal investigation will be presented. The project, part of the Colorado School of Mines Undergraduate Geophysics curriculum, is conducted throughout a student's senior year. The geothermal reservoir studied has surficial manifestations at Waunita Hot Springs, located in the southeastern corner of Gunnison County. The springs have been identified by the Colorado Geological Survey as a resource with potential for geothermal power generation, (Barrett and Pearl, 1978). The project goals are to better understand the geothermal reservoir and its geologic structure. To understand the fracturing system that defines and controls the reservoir, geophysical mapping of the subsurface conductivity will be presented. An image of the deeper conductivity distribution will be displayed as a result of a time domain electromagnetic survey. For imaging at shallower depths, with greater detail, the electrical methods, specifically SP and DC resistivity, were utilized. Detailed geologic maps of the area are limited; therefore, a geologic survey will be conducted along with the collection of hydrological data. A geochemical analysis of the water from the springs and temperature gradients calculated from borehole measurements will also be presented. The observations and data will be useful in assessing the geothermal potential of Waunita Hot Springs.
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